Upload
aaralyn
View
40
Download
0
Tags:
Embed Size (px)
DESCRIPTION
Building the Propagation Environment. LAT 109. What does the propagation environment have to do?. Depends… on what you’re propagating and where you are. Hardwood cuttings Softwood and semi-hardwood cuttings Seed propagation. - PowerPoint PPT Presentation
Citation preview
What does the propagation environment have to do?
• Depends… on what you’re propagating and where you are.
• Hardwood cuttings
• Softwood and semi-hardwood cuttings
• Seed propagation
For semi-hardwood and seed prop
• Provide a low-water loss environment– High humidity
• Provide protection from the elements– Cover
• Provide light (but not too much)– Open, but shade if necessary
• Provide a temperature conducive to rooting (germination)– 70 to 75° F
Key features
• Structure• Cover• Raised bench• Drainage• Intermittent mist• Bottom heat• Light/shade system
Drainage
• Ground cloth• Gravel• Permeable pavers• Concrete (with drain
tile)• Proper grade• Critical if propagating
on the ground!
Intermittent mist
• Water source• Piping• Nozzles• Mist timer• Day timer• Turn on in the morning,
turn off at night• Every 8 minutes for 8
seconds is typical
Light/shade system
• Shade cloth– Summer– Reduce UV– Reduce temperature– Sold by % shade– Automated systems
• Supplemental light– Induce flush of growth– Tricks the plant into
thinking long days (short nights)
Light interruption to induce growthWinter = short days and long nights = minimal growth
Summer = long days and short nights = growth
Light interruption = short nights = growth
Avoiding diseases• Major pathogens– Soil born pathogens– Root rots – “damping
off” or “foot rot”– Water molds• Pythium (wet & cool)
and Phytophthora (wet & cool)
– True fungi• Rhizoctonia (wet &
warm) and Fusarium (variable)
Strategies
• Cultural– Disease free plants– Clean tools– Clean facilities– Clean containers
• 10% bleach– Sterile media– Work in a separate area
from mist bench– Environmental conditions– Monitor daily
• Chemical– Fungicide
• Soak cuttings prior to sticking
• Drench beds after sticking
– http://ipm.illinois.edu/diseases/rpds/615.pdf
Easy-ish to propagate conifers• Cupressus• Chamaecyparis• Thuja• Juniperus• Thujopsis• x Cupressocyparis leylandii• Taxus• Cryptomeria• Tsuga• Calocedrus
Our protocol today• 4 to 8 inches long terminal (tip) cuttings with some wood are most often
used. However, you can try heel and mallet cuttings as well.• Remove foliage from lower half• Trim foliage (tops) if necessary• Basal wounding can help• Using Wood’s rooting hormone (1.03% IBA), we’ll want to mix up 10 oz
of 3000 ppm IBA to be divided among the benches for our 5 second quick dip. How much Wood’s do we add to how much water to get 10 oz of a 3000 ppm IBA solution?
• Insert ~ 2 inches into propagation media• e.g. Cupressus, Chamaecyparis, Thuja, Juniperus, Thujopsis,
× Cupressocyparis leylandii, Taxus, Cryptomeria, Tsuga, Calocedrus• Today we’ll use the 6-cell packs for our conifer cuttings. Each student is
to stick a minimum of 12 cuttings (2 packs per person)• Remember: 10% bleach to sterilize pots, 1:2 peat:perlite media, LABELS,
all cuttings go on the mist bench in the West greenhouse.