8
Alternaria leaf spot (ALS) develops on older leaves first and is not a problem unless it infects the head (Fig. 1). Look for circular small, dark/brown spots with concentric rings (target spots) on the upper surface of leaf. When humid- ity is high, lesions can be covered with a sooty black mass of spores (Fig. 2). Symptoms on cauliflower and broccoli heads begin as browning at the margins of individual flowers. Black sunken spots develop on individual florets and expand to include large areas of the head (Fig. 3). On cabbage, spots range in size from pinpoint to several cen- meters in width (Fig. 2). Bravo, Quadris/Quadris Top, Switch, Cabrio and Inspire Super are control opons for ALS. In a 2010 Cornell study, Dillard et al. found that best control of ALS was achieved with Switch, fol- lowed by Quadris and then Rov- ral (only labeled on Chinese mus- tard). Although Bravo provided some control of ALS, it was not as effecve as the other fungi- cides. None of the fungicides provided more than 50% control of ALS in this study. Another Volume 8, Issue 21 August 15, 2012 Cooperative Extension Cornell Vegetable Program Cornell University Weekly Veg Edge Veg Edge Veg Edge Contents General Erie Canal to Re-Open on Thursday ........................ 6 Dates .......................................................................... 6 Sponsors .................................................................... 7 Weather Charts ......................................................... 7 Crops Crops: Tidbits & Insights ................................... 4 & 5 Cole Crops: Control of Alternaria Leaf Spot ............ 1 High Tunnel Winter Greens Project ........................ 3 Potato/Tomato: Late Blight Risk ............................. 2 Sweet Corn Trap Network Rpt, 8/14/12 ................. 3 Control of Alternaria Leaf Spot with Fungicides in Cole Crops by Christy Hoepng, Cornell Vegetable Program Figure 1. Alternaria leaf spot on cabbage head. Photo courtesy of Helene Dillard, Cornell Figure 2. Diagnostic target-spot lesions of Alternaria leaf spot on cabbage leaf. Notice the black spores in the center of the lesions. Continued on next page

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Page 1: Cornell University Cornell Vegetable Programrvpadmin.cce.cornell.edu/pdf/veg_edge_weekly/pdf44_pdf.pdf · growers on implementing these and other IPM steps in their fall/winter tunnels

Alternaria leaf spot (ALS) develops on older leaves first and is not a problem unless it infects the head (Fig. 1). Look for circular small, dark/brown spots with concentric rings (target spots) on the upper surface of leaf. When humid-ity is high, lesions can be covered with a sooty black mass of spores (Fig. 2). Symptoms on cauliflower and broccoli heads begin as browning at the margins of individual flowers. Black sunken spots develop on individual florets and expand to include large areas of the head (Fig. 3). On cabbage, spots range in size from pinpoint to several centi-meters in width (Fig. 2).

Bravo, Quadris/Quadris Top, Switch, Cabrio and Inspire Super are control options for ALS. In a 2010 Cornell study, Dillard et al. found that best control of ALS was achieved with Switch, fol-lowed by Quadris and then Rov-ral (only labeled on Chinese mus-tard). Although Bravo provided some control of ALS, it was not as effective as the other fungi-cides. None of the fungicides provided more than 50% control of ALS in this study. Another

Volume 8, Issue 21 August 15, 2012

Cooperative Extension Cornell Vegetable Program

Cornell University

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Contents General

Erie Canal to Re-Open on Thursday ........................ 6

Dates .......................................................................... 6

Sponsors .................................................................... 7

Weather Charts ......................................................... 7

Crops Crops: Tidbits & Insights ................................... 4 & 5 Cole Crops: Control of Alternaria Leaf Spot ............ 1 High Tunnel Winter Greens Project ........................ 3 Potato/Tomato: Late Blight Risk ............................. 2 Sweet Corn Trap Network Rpt, 8/14/12 ................. 3

Control of Alternaria Leaf Spot with Fungicides in Cole Crops by Christy Hoepting, Cornell Vegetable Program

Figure 1. Alternaria leaf spot on cabbage head. Photo courtesy of Helene Dillard, Cornell

Figure 2. Diagnostic target-spot lesions of Alternaria leaf spot on cabbage leaf. Notice the black spores in the center of the lesions.

Continued on next page

Page 2: Cornell University Cornell Vegetable Programrvpadmin.cce.cornell.edu/pdf/veg_edge_weekly/pdf44_pdf.pdf · growers on implementing these and other IPM steps in their fall/winter tunnels

Continued from cover

study conducted in the greenhouse showed that different isolates of Alternaria brassicicola (the most common path-ogen of ALS in NY) collected from different fields across NY responded differently to the different fungicides. In two of the isolates, Quadris Top provided 88 to 100% control of ALS, which was closely followed by Bravo, while Inspire provided ~50% control. In another isolate, Bravo failed to control ALS while Quadris Top and Inspire provided only ~50% control. Finally, in a forth isolate, none of the fungi-cides provided any control of ALS. Finally, isolates collected in 2011 from cauliflower, Brussels sprouts and kale were effectively controlled by Bravo and Quadris Top. Previous studies outside of Cornell have shown that best control of ALS caused by Alternaria brassica (not brassicicola) was provided by Inspire Super, followed by Quadris and then Bravo. These results suggest that ALS can be very challeng-ing to control with fungicides, especially when weather conditions are very favorable for disease development. For best control, when disease pressure is threatening head quality, a tank mix of Quadris/Quadris Top + Bravo should be used, perhaps alternated with Switch or Inspire Super. Note that there are restrictions on the number of consecutive applications and rotation partners that can be used with Quadris/Quadris Top and Inspire Super for resistance management. For example, Inspire Super, Quadris, Pristine and Cabrio cannot be used as rotation partners with Quadris Top. Read labels carefully!

Veg Edge Weekly

Page 2

Volume 8, Issue 21

Figure 3. Cauliflower head infected with Alternaria leaf spot. Photo courtesy of Helene Dillard, Cornell

Late Blight Risk

C. MacNeil, CVP: Late blight (LB) was confirmed on pota-toes in Allegany Co, NY, the end of last week, has since been confirmed as US-23, and has been stopped in its tracks by a mefenoxam (Ridomil, OLF) spray. This is the first WNY confirmation of LB, and the first upstate NY confirmation of LB on potato. LB was just confirmed on tomatoes in Tompkins Co. on 8/14. Scout your potato and tomato fields carefully! The occasional showers, even if light and brief, and the dew, can result in long enough wetting periods for LB spore development and dispersal. LB spores can be carried on the wind long dis-tances, to cause infection 30 miles away. LB was previ-ously confirmed on tomatoes in Onondaga Co. All other LB confirmations in NY have been in Eastern NY. Since LB can’t overwinter on tomato crop residue or tomato seed it is likely that any LB infections are from volunteer, cull or seeded potatoes on farms or in gardens. To date all NY LB with tests completed has been US-23, sensitive to mefenoxam (Ridomil, OLF), as is all the LB in PA (south and central PA).

For potato growers who rely on seed from Maine: LB has been confirmed in central ME in several locations, and in Southern, central and Northern ME in specific locations.

If you think you may have LB contact Carol MacNeil at 585-313-8796 or [email protected], or one of the other Cornell Veg Program Specialists, ASAP. It’s important that LB be confirmed so that other growers in the region can be alerted. Also, if the LB strain is known then the best fungicide can be chosen to control it, or prevent further infection. Kill any hotspots immediately!

1 Weather stations. For more sites: http://newa.cornell.edu/ 2 Simcast Blight Units (BUs)

Simcast Blight Units (BUs) during the past week across the CVP area have risen tremendously at many weather stations. Almost all indicate the need for no more a 5 day spray interval for sus-ceptible varieties, if chlorothalonil (Bravo, OLF) is used. Several weather stations indicate the need for a 5 day interval for even moderately resistant varieties. Note: The weather at your fields may differ from the weather at the station. In addition, in low spots, shaded parts of the field, and areas next to windbreaks like trees, foliage will stay wet longer than average increasing the LB risk. (This chart assumes the last spray was the high rate of chlo-rothalonil (Bravo, OLF). The threshold for the next spray on a LB susceptible variety is 30 BUs; for a moderately susceptible variety - 35 BUs; a moderately resistant variety - 40 BUs.)

August 15, 2012

Location1 Blight Units2

8/08-8/14

Location1 Blight Units2

8/08-8/14

Blight Units2

8/01-8/07

Blight Units2

8/01-8/07

Albion 38 Lafayette 33 17 27

Appleton 30 Lodi 25 0 25

Baldwinsville 39 Penn Yan 46 23 31

Buffalo 30 Ransomville 34 13 12

Ceres NA Rochester 46 38 32

Elba NA Sodus 26 NA 10

Farmington 10 Syracuse 32 22 21

Gainesville 48 Versailles NA 44 NA

Geneva 24 Williamson 26 25 12

Late Blight Risk Chart, 8/14/12

Page 3: Cornell University Cornell Vegetable Programrvpadmin.cce.cornell.edu/pdf/veg_edge_weekly/pdf44_pdf.pdf · growers on implementing these and other IPM steps in their fall/winter tunnels

August 15, 2012 Volume 8, Issue 21 Veg Edge Weekly

Page 3

High Tunnel Winter Greens Project J. Reid, CVP: It’s time to begin planning for Fall and Winter grown high tunnel crops such as spin-ach, lettuce and Asian greens. Although we re-duce some diseases and insects in high tunnels, others can be accentuated. Pest management in cold season tunnel crops begins now as the first step is to scout summer tunnel crops. Tomatoes, peppers and cucumbers can all pre-load the win-ter crop with pests such as aphids and thrips. For-tunately in August and September temperatures and day-length allow us to implement a biocon-trol program. Aphids, thrips, mites and white-flies all have predators and parasitoids that can be purchased and released, providing very good control with no concerns about preharvest intervals, re-entry intervals or phytotoxicity. We continue to work with growers on implementing these and other IPM steps in their fall/winter tunnels and greenhouses. We are actively seeking co-operators now! If you are growing greens in a tunnel, or are interested in doing so, contact Judson or Katie. We can help with recommended varieties, planting dates, fertili-zation and pest control.

Harvesting high tunnel greens (above). Cornell Vegetable Program Technician, Katie Klotzbach, scouting high tunnel spinach (left). Photos: Judson Reid, Cornell Vegetable Program

WNY Pheromone Trap Network Report, 8/14/12 Abby Seaman, NYS IPM Program

E race European corn borer (ECB) numbers remain low this week; Z race counts are up at a few locations. Corn ear-worm (CEW) numbers took a big jump at several locations this week, with numbers at some locations high enough to call for a 4 day spray schedule while temperatures are above 80 (See table). The weather forecast calls for lower temperatures later this week, so a day can be added to the spray interval once temperatures drop for a few days. Fall armyworm numbers remain low. Western bean cutworm (WBC) numbers are mostly lower this week with the excep-tion of Kennedy in Chautauqua county. WBC larvae were found last week in field corn in the Attica area, so where CEW numbers are not high enough to determine the spray schedule, scout for ECB and WBC egg masses and larvae in late whorl and tassel-emergence stage fields. Here’s a vid-eo (http://youtube/rlt9nftkja) from Purdue on scouting for WBC egg masses and larvae. Ontario is suggesting a thresh-old for WBC of 5% infested plants in sweet corn. If WBC is not present, the 15% infested plants at tassel emergence and 5% at silking thresholds are still useful.

ECB - European corn borer CEW - corn earworm FAW - fall armyworm

WBC - western bean cutworm NA - not available

Average corn earworm catch

Per Day Per Five Days Per Week Days Between Sprays

<0.2 <1.0 <1.4 No Spray (for CEW)

0.2-0.5 1.0-2.5 1.4-3.5 6 days

0.5-1.0 2.5-5.0 3.5-7.0 5 days

1-13 5-65 7-91 4 days

over 13 over 65 over 91 3 days

Add one day to the recommended spray interval if daily maximum temperatures are less than 80° F for the previous 2-3 days.

Location ECB-E ECB-Z CEW FAW WBC

Baldwinsville (Onondaga) 1 2 14 5 11

Batavia (Genesee) 0 2 4 0 0

Bellona (Yates) 0 0 9 2 3

Eden (Erie) 0 0 2 0 10

Farmington (Ontario) 0 0 0 0 0

Hamlin (Monroe) 3 4 9 0 5

LeRoy (Genesee) 0 0 6 0 2

Lockport (Niagara) 0 0 0 0 0

Olean (Cattaraugus) 0 3 1 0 0

Penn Yan (Yates) 0 11 2 0 2

Spencerport (Monroe) 0 0 0 0 0

Waterport (Orleans) 0 1 0 0 1

Williamson (Wayne) NA NA NA NA NA

WNY Pheromone Trap Catches: August 14, 2012

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August 15, 2012 Volume 8, Issue 21

CABBAGE & COLE CROPS It feels like fall is in the air! Cooler nights and heavy morning dews favor disease development of Alternaria leaf spot and fungicide sprays may be warranted – see front cover article.

DRY BEANS Dry beans are developing, with split or prolonged pod set noticeable in a num-ber of fields due to the prolonged hot, dry weather earlier.

From Keith Waldron, NYS IPM Field Crops Coordinator: Small Western bean cutworm (WBC) larvae were found in field corn ears, the first in NYS this sea-son, next to the dry bean field with the Attica WBC moth trap. About 1% of corn plants were infested, a low rate. No WBC eggs were found. If you are farming in the Attica area scout dry beans and field/sweet corn for WBC larvae now. Attica is a hot spot in WNY, with a much higher moth catch than else-where. In dry beans, scout in ten spots in a field and examine pods from sever-al plants in each spot for cut pods, feeding on pods or holes in the pods. While very small WBC larvae may remain on the bean plants, the larger ones drop to the soil for the day and feed at night. Peak moth catch was around July 24th and dry bean pod damage can be expected 10 – 21 days later. Moth catches are now dropping. If any pod damage is seen an insecticide should be applied soon, before the larvae damage bean seeds. A single application of a pyre-throid insecticide is recommended.

Very young WBC have small, distinct spots, their true legs are black, and they loop when they walk. These characteristics distinguish them from small European corn borers. Dr. Difonzo states: “Middle-aged WBC larvae look like true armyworm without the bands on their pro-legs. WBC larvae have a gap between their true legs at the front and the prolegs (chubby back legs). This gap causes them to walk like an inch worm.”

GREENS Lettuce continues to get hammered by leaf hoppers. Hoppers are spread-ing the aster yellows virus causing discoloration and leaf distortion on some varieties. Resistant varieties aren’t really available, though, observa-tions indicate that some varieties seem to have more tolerance than oth-ers. Like cucumber beetles where some carry bacterial wilt and others don’t, leaf hoppers can do damage through feeding and some can pass the virus making matters worse.

Slugs and snails have increased in some locations where there has been wet cool weather. The product Deadline Bullets is available among others for management.

ONIONS For the first time in a long time, the irrigation wasn’t going when I went out to scout onions this Monday. The majority of the crop is laying down or on its way with only a few fields still left green and standing. Early direct seeded onions have reportedly not yielded as well as hoped; the crop finished up too quickly during the stifling heat of July and didn’t make size. Main and late season direct seeded and trans-planted onions are holding on well and continue to make size. Looks like the rainfall over the past couple of weeks will make a difference. Not much new to report this week: Onion thrips pressure is very low and I don’t know if they have just moved on or if growers have killed them all. We do not recommend applying insecticides to manage thrips when they are less than 1.0 per leaf.

Attention Onion Grower Cooperators of Research Trials: All on-farm research trials underway will be going to yield this year. This includes large small-plot trials, as well as several mini plots that are set up in several fields. During Christy’s absence in the next 2 weeks, please contact Katie Klotzbach (585-732-2545) or Elizabeth Buck (607-425-3494) for estimated harvest dates, as it is critical that we get our final data prior to onion pulling. Your cooperation is much appreciated!

POTATOES Reminder: If you’ll be attending the 8/23 Fresh Market Potato Varieties, and Insect & Disease Management Meeting pre-register for dinner ASAP by calling 585-313-8796! Potatoes range from green and sizing tubers to harvest of early planted, early varieties. Many fields are being vine-killed as vines mature, and to control size. The prolonged heat has hastened growth and development. If your potatoes, or a specific variety, is particularly hard to kill you may have used more nitrogen than needed. See the 2012 Cornell Vegetable Guidelines Potato section for nitrogen rate recommendations for specific varieties at: http://www.nysaes.cals.cornell.edu/recommends/24frameset.html See the 7/25 Veg Edge Weekly for cautions regarding early potato harvest/harvest in hot weather. If your potatoes have a ways to go continue scouting for Colorado potato beetles and potato leafhoppers. See the Late Blight Risk section, page 2!

CROPS Tidbits & Insights

Veg Edge Weekly

Page 4

Western bean cutworm dry bean pod damage. Photo courtesy of Chris Difonzo, Michigan State University

Aster yellows on lettuce. Notice the yellowing and distortion of leaves.

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August 15, 2012 Volume 8, Issue 21 Veg Edge Weekly

Page 5

PROCESSING CROPS Beets - Harvest started last week and was a bit delayed this year due to the drought. Yields are reported to be good so far. Keep scouting for leaf spot diseases. See last week’s Veg Edge Weekly.

Carrots - Growth has improved this month with rain and cooler temperatures. Continue management of leaf blights and aster leafhoppers.

Snap beans - Harvest is about 30% complete. Yields have improved with the rain received this month. Both processors report that there have been no disease issues so far. The risk for molds will remain high through the end of the season as long as rain and morning dews are present. The field crop IPM program reports that potato leaf hopper populations continue to be high, but are dropping somewhat. Soybean aphid populations have been very low this year, reducing the risk for viruses. Other aphids are around that can spread virus, but the risk for processing snap beans is relatively low.

Sweet corn - Harvest started around the first of the month, a little earlier than planned. Yields are running below average. Common rust is beginning to show up on susceptible varieties. Quadris, Quilt, Quilt XL, PropiMax, Tilt and Headline are all labeled. Headline SC, Headline AMP and Headline SC all have a SLN label for aerial application now. See special labels at the PIMS website http://pims.psur.cornell.edu/.

From J. Pataky, Univ. Illinois: Sweet corn yield is reduced about 6% for each 10% of the leaf area infected with common rust. Severity of rust is affected by the growth stage at which plants are first infected, weather, and host resistance. Severe infection must be prevented in order to avoid yield reductions due to rust. Host resistance is the best control. Results of the Univ. of Illinois sweet corn disease resistance evaluations from 1984 to 2010, as well as management information can be found at www.sweetcorn.uiuc.edu. When resistance is not ade-quate to control rust, fungicides are applied to prevent severe infection. Fungicides are NOT curative. They are of little benefit after infec-tion is severe. Fungicide applications are more crucial when plants are young than after tassels emerge. Juvenile tissue is more susceptible than adult plant tissues, and moisture accumulates in leaf whorls of seedlings creating excellent conditions for urediniospores to germinate and infect. Application of fungicides to younger plants also is important to prevent the production of large amounts secondary inocula. Two or three well-timed applications of fungicides before rust becomes severe will provide better control than multiple applications after rust is severe. If rust severity reaches 10 or 20% on lower leaves, urediniospores are so abundant that subsequent applications of fungicides may only retard rust development rather than effectively controlling it. Fungicide applications after pollination are of minimal value since the latent period for Puccina sorghi is seven days, and sweet corn harvest usually is only 2 or 3 weeks away.

TOMATOES Armyworms have been found on high tunnel tomatoes over the last two weeks. These were early stage in-stars of the second generation for this season (Fig. 1). In most cases the infestation is light, considering that tomatoes are not a preferred host of Armyworm, and treatment is not warranted. However in at least once case, interven-tion was necessary to maintain fruit quality. When ap-plying insecticides inside a high tunnel we must verify that there is no greenhouse prohibition on the label, and that both the pest and the crop are listed. At this time of year a short pre-harvest (PHI) interval is also important. A short list would include Hero (1-day PHI), Dipel (OMRI listed, 0-day PHI) and Entrust (OMRI listed, 1-day PHI). Remember that all sprays work best against the younger life stages. Check your Veg Edge archives for more details on the biology of Armyworms.

Early blight (Fig. 2) has not been severe this year, although this disease can be somewhat farm specific. Severity is higher when there is soil splashing, re-used stakes and susceptible varieties. A small amount of Early Blight is not a crisis. Our current work on inter-row cover crops is measuring the impact on early blight, but there is little disease pressure to date.

VINE CROPS Downy mildew is spreading to other counties now. New findings in Alleghany, Suffolk, Seneca, and Ontario. Being this widely distributed, it is safe to assume the spores have spread everywhere so tighten up your spray schedules especially after rain events keep the pressure up (smaller droplet size) on the sprayer to get good coverage on both sides of the leaves. Downy can spread from cucumbers to melons easily but also can move to squashes.

Powdery mildew is full blown in some plantings with the humidity and rains increasing. Remember that most of the products used to man-age DM aren’t labeled for PM or the few that are (ie. Bravo and copper) aren’t as effective for one as the other. Products that do well to control PM (Quintec and Procure for example) aren’t listed for DM. Take home message is that to control both diseases, separate products are needed.

Spider mites have been found more widely on cucumber plantings adding to the pressure on these crops. Scout to see if they spread to other vine crop plantings. Once established, spider mites are hard to get rid of.

CROPS Tidbits & Insights (continued)

Figure 1. Armyworm on tunnel tomato. Photo: Judson Reid, Cornell Vegetable Program

Figure 2. Tomato early blight. Photo: Judson Reid, Cornell Vegetable Program

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August 15, 2012 Volume 8, Issue 21 Veg Edge Weekly

Page 6

AUGUST 16 - MANAGING DISEASES & INSECTS ON ORGANIC FARMS 4:00 - 7:00 pm, Homer C. Thompson Vegetable Research Farm, Freeville. Presented by Organic at Cornell University and NOFA-NY. Learn about beneficial insect habitats, the latest disease resistant crop varieties, pest management on Cornell’s organic research farm, and growing broccoli in a reduced tillage system. FREE! For more information, contact Betsy Leonard at 607-423-8366 or [email protected].

AUGUST 21 - PROCESSING SNAP BEAN AND SWEET CORN VARIETY FIELD DAY Vegetable Research Farm, County Road 4, Geneva (1 mile west of the NYS Ag Experiment Station). 1:00 pm Snap Beans; 3:00 pm Sweet Corn; 5:30 pm Vegetable Agribusiness Steak Roast, at the Pavillion behind Jordan Hall. For more information or to RSVP for dinner, contact Jim Ballerstein 315-787-2223 or [email protected].

AUGUST 22 - NORTHEAST BUCKWHEAT FIELD DAY 1:00 - 3:30 pm, Oeschner Farm, 1045 Trumbulls Corners Rd, Newfield, NY 14867. Free, no preregistration needed. Buck-wheat in your rotation, double-cropping after small grains, harvest equipment display, farmer-to-farmer exchange. Produc-tion information: www.hort.cornell.edu/bjorkman/lab/buck/ Questions? Thomas Björkman, Cornell, 315-787-2218 or [email protected] Sponsored by: Cornell University, Cornell Cooperative Extension, The Birkett Mills and NOFA-NY.

AUGUST 23 - FRESH MARKET POTATO VARIETIES, AND INSECT AND DISEASE MANAGEMENT Please pre-register for dinner ASAP! Call Carol MacNeil at 585-313-8796. John Williams' Farm in Marion is again the host for the extensive Cornell fresh market potato variety and breeding line trial. Don Halseth will discuss the varieties’ yield, quality and marketability. Tom Zitter will describe reducing black dot stem infection (early dying) and tuber disease. Manag-ing CPB insecticide resistance and high potato leafhopper populations will be covered by Brian Nault. CVP Specialist Carol MacNeil, and participating growers, will describe benefits using the updated Late Blight Decision Support System (DSS). 1.0 DEC pesticide recertification credit available. Thanks to Bayer CropScience, DuPont, Stanton Ag Service, and Syngenta for sponsoring! Visit the Cornell Vegetable Program website for more information and the full agenda at http://cvp.cce.cornell.edu/event.php?id=28.

AUGUST 27 - EDEN VALLEY CROP WALK AND TWILIGHT MEETING 5:30 pm, Eden Valley Growers Coop, Rt 62, Eden Valley. DEC pesticide recertification credits will be available. Crop walk and discussion of diseases plus review of pepper IPM project. For more information, contact Robert Hadad at 585-739-4065 or [email protected].

SEPTEMBER 18 - 2012 NYS DRY BEAN FIELD MEETING 5:00 - 8:15 pm, Bob and Dan Duyssen Farm, 6620 Westacott Rd, Stafford 14143. $5 for current Cornell Vegetable Program enrollees; $10 for all others. Start at the Cornell dry bean variety trial at Duyssen’s. Eric Sandsted and Don Halseth will de-scribe the black, and light and dark red kidney, varieties and lines in the trial and you’ll have a chance for a first-hand look. Duyssen’s strip trials of promising black and light red kidney lines are also nearby. Eight WNY growers have the lines and there will be time to discuss how they look. Phil Griffiths, bean breeder, will discuss and show his white mold resistant red kidneys. Leafhoppers were terrible this year and Brian Nault, Cornell, will explain why and how to decide whether to spray. Keith Waldron, NYS IPM Program, and Carol MacNeil, Cornell Vegetable Program, will report on the spotty, high Western bean cutworm populations, including in Attica in WNY, and how to recognize their damage. There will be a brief update on food safety as it relates to dry beans, and the Good Ag Practices (GAPs) program. DEC and CCA credits will be available. Thanks to King Cole Bean for sponsoring! Pre-register for supper by 9/12 – 585-313-8796 or [email protected]. Watch for the full agenda and sponsor information to be posted on the Cornell Vegetable Program website next week.

Dates...

Erie Canal to Re-Open on Thursday, August 16th

Julie Kikkert, CVP: According to Howard Goebel from the NYS Canal Corporation, the embankment repairs at the Albion worksite are complete. Canal Corporation staff have begun to slowly refill the 10-mile section between the Albion and Holley Guard Gates. The canal was half-full yesterday afternoon. It is anticipated that the entire system will be refilled to normal navi-gation levels on Thursday. This is good news for growers still wishing to irrigate from the canal.

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Volume 8, Issue 21 Veg Edge Weekly

Page 7

* Airport stations ** Data from other station/airport sites is at: http://newa.cornell.edu/ Weather Data, Daily Summary and Degree Days.

August 15, 2012

Weather Charts J. Gibbons, CVP:

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Rainfall (inch) Temp (°F)

Location Week Month August

Max Min

Albion 0.61 1.11 85 58

Appleton, North 0.05 1.21 86 57

Baldwinsville 0.36 0.74 87 56

Buffalo* 0.04 0.86 85 57

Ceres 1.90 2.50 85 52

Elba NA NA NA NA

Farmington 0.34 0.66 87 52

Gainesville 0.16 0.64 83 50

Geneva 0.28 0.36 86 57

Lafayette 0.37 0.64 88 53

Lodi 1.22 1.24 89 56

Penn Yan* 0.97 1.03 86 57

Ransomville 0.39 1.42 85 61

Rochester* 0.75 2.45 87 57

Sodus 1.23 1.93 88 51

Syracuse* 0.83 0.93 91 56

Versailles NA NA 84 50

Williamson 0.12 0.43 86 58

Weekly Weather Summary: 8/07 - 8/13

Accumulated Growing Degree Days (AGDD) Base 50°F: Jan. 1 — August 13, 2012

Location 2012 2011 2010

Albion 2067 1831 1970

Appleton, North 1906 1518 1725

Baldwinsville 2164 2036 NA

Buffalo 2267 1945 2001

Ceres NA 1748 NA

Elba NA 1753 1957

Farmington 1984 1759 1908

Gainesville 1920 1797 1847

Geneva 2134 1969 2064

Lafayette 2049 1850 1863

Lodi 2085 1968 2135

Penn Yan 2172 2016 2028

Ransomville 2059 1833 1946

Rochester 2223 1935 2048

Sodus 1927 1734 NA

Syracuse 2334 2190 2111

Versailles 2035 NA NA

Williamson 2123 1835 2013

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Serving Allegany, Cattaraugus,

Erie, Genesee, Monroe, Niagara,

Onondaga, Ontario, Orleans,

Seneca, Wayne and Yates Counties

Veg Edge Weekly is a seasonal weekly publication of the Cornell Vegetable Program providing information about crop development, pest activity and management, pesticide updates, local weather conditions, meetings and resources.

Veg Edge is published 28 times annually, monthly from October-May and weekly from May-September. If you have any questions about this publication, contact Julie Kikkert at 585-394-3977 x404 or [email protected]. Visit the Cornell Vegetable Program website at http://cvp.cce.cornell.edu/ for information on our research, upcoming events and enrolling in our program.

Cornell Cooperative Extension provides equal program and employment opportunities.

Robert Hadad 585-739-4065 Cell [email protected]

Christy Hoepting 585-721-6953 Cell [email protected]

Julie Kikkert 585-313-8160 Cell [email protected]

Carol MacNeil 585-313-8796 Cell [email protected]

Judson Reid 585-313-8912 Cell [email protected]

Cornell Vegetable Program Extension Specialists

Elizabeth Buck, 607-425-3494 Cell

John Gibbons, 716-474-5238 Cell

Katie Klotzbach 585-732-2545 Cell

CVP Assistants

This publication contains pesticide recommendations. Changes in pesticide regulations occur constantly and human errors are possible. Some materials may no longer be available and some uses may no longer be legal. All pesticides distributed, sold or applied in New York State must be registered with the New York State Department of Environ-mental Conservation (DEC). Questions concerning the legality and/or registration status for pesticide usage in New York State should be directed to the appropriate Cornell

Cooperative Extension specialist or your regional DEC office.

Cornell Cooperative Extension and its employees assume no liability for the effectiveness or results of any chemicals for pesticide usage. No endorsement of products or com-panies is made or implied. READ THE LABEL BEFORE APPLYING ANY PESTICIDE.

Yates County Cornell Cooperative Extension 417 Liberty Street Penn Yan, NY 14527

Cooperative Extension Cornell Vegetable Program

Cornell University