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Crop Rotations for Prevention of Phytophthora capsici Infection in
Solanaceous and Cucurbit Crops A Lecture
By Mr.Allah Dad Khan Former DG Agriculture Extension
KPK Province [email protected]
03329221298
Crop Rotation: Planting different type
crops in succession in the same field.Rotating crops helps to:
1. utilize nutrients in the soil2. control disease organisms3. control weed species4. control nematode populations5. control insect populations
Solanceous CropsFamily: Solanaceae
–Susceptible to Phytophthora capsicia) Tomatob) Pepperc) Eggplantd) Tobacco
Cucurbit CropsFamily: Cucurbitaceae
• Susceptible to Phytophthora capsici1. Squash2. Cucumbers3. Pumpkins4. Melons
Grower Reasons for Lack of Using Crop Rotations
1. Limited Land Resources 2. Farm Specializes in a Few Crops3. Limited Markets for Alternative Crops4. Unfamiliarity with Plant Families and
Disease Susceptibility
Crop Rotation Plan to reduce Phytophthora capsici
1. Plant non-susceptible crops for 3-5 years2. Plant winter cover crops to increase soil
organic matter3. Plant summer cover crops rather than
leaving field fallow
Plant Families Not Susceptible to Phytophthora capsici
Family: Fabaceae (Leguminosae)• “The Bean and Pea Family”
1. Beans2. Peas3. Clovers4. Vetches
Plant Families Not Susceptible to Phytophthora capsici
Family: Brassicaceae (Cruciferae)
• “The Cole Crops”1. Greens: Collards, Kale, Mustards2. Cauliflower 3. Turnip4. Broccoli5. Cabbage6. Radish
Plant Families Not Susceptible to Phytophthora capsici
Family:Apiaceae (Umbelliferae)
1. Carrots2. Celery3. Florence Fennel4. Parsley5. Cilantro6. Parsnip
Plant Families Not Susceptible to Phytophthora capsici
Family: Alliaceae (Amaryllidaceae)
A. OnionsB. GarlicC. LeeksD. ShallotsE. ScallionsF. Chives
Plant Families Not Susceptible to Phytophthora capsici
Family: Asteraceae (Compositae)
1. Lettuces2. Dandelion3. Jerusalem Artichoke4. Endive/Escarole5. Globe Artichoke
Plant Families Not Susceptible to Phytophthora capsici
Family: Chenopodiaceae
1) Spinach2) Swiss Chard3) Beets
Plant Families Not Susceptible to Phytophthora capsici
Family: Poaceae (Gramineae)
• FOR HARVEST OR GREEN MANURE• “The Cereals”
– Rye– Wheat– Corn– Sudangrass– Sorghum
Other Plants Not Susceptible to Phytophthora capsici
Medicinal Herbs
1. Purple Cone Flower2. St. John’s Wort3. Chamomile4. Yarrow5. Golden Seal
Other Plants Not Susceptible to Phytophthora capsici
Culinary Herbs
1. Basil2. Oregano3. Mint4. Thyme5. Sage
Additional Tools to Control Phytophthora capsici
• FIELD WATER MANAGEMENT 1. Irrigation2. Raised Beds3. Field Water Flow 4. Swails at Field Ends 5. Cultivate to the Swail
Additional Tools to Control Phytophthora capsici
• CHEMICAL CONTROLS - FUNGICIDES1. Soil fumigation2. Soil Applied Fungicides 3. Foliar Applied Fungicides
Additional Tools to Control Phytophthora capsici
PRACTICE GOOD SANITATION1. Clean Equipment
2. Work Contaminated Field Last3. Do Not Work Contaminated Areas4. Remove Infected Plants
Additional Tools to Control Phytophthora capsici
• ENHANCE SOIL HEALTH– Increase Organic Matter
• green manure• off-farm supplements
– Stay Off Wet Fields– Break up hard pans
– Eliminate fumigation if possible
Summary: Controlling Phytophthora capsici
• Use proper crop rotations
• Practice good water management
• Utilize fungicides correctly
• Practice good sanitation
• Enhance Soil Health
CONCLUSIONS
1. Crop rotation can help to control Phytophthora capsici
2. Rotations must be used with other tools to be successful
3. Know susceptible and non-susceptible crops to plan rotations
4. Rotating crops will show more benefits than just controlling Phytophthora capsici
Thank you very muchThank you very much
