powerpoint presentationswfrec.ifas.ufl.edu/docs/pdf/veg-hort/tomato-institute/presentations/... ·...
TRANSCRIPT
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Causes of Inconsistency : • Physical
• Chemical
• Cultural
• Environmental
Physical & Chemical Characteristics
Soil Movement – Behavior in Soil
WHAT WILL WE TALK ABOUT ?
Summarize Key Concepts
*
Full System Approach
Fallow Program Selection
Fallow Weed Management
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4 - 6 weeks
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Production = Full System Approach
Preplant preparation Herbicides/cultivation
Fumigation Select fumigant and plastic mulch based on known
field history Herbicides
Preplant, under mulch, postemergence, row middles Post production burn-off Fallow season programs
Cover crop or stale seedbed technique
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Fallow Programs
Do not allow fields to sit after harvest!
1st application – Gramoxone/Firewall burns down existing foliage but it does not clean up a
field Yellow and purple nutsedge, goosegrass, purslane,
etc. continue to grow
2nd application - glyphosate plus carfentrazone for control of nutsedge and difficult to control
broadleaf weeds
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Fallow Program Selection
Integrated Pest Management Cover crops vs. Fallow weed management program Weedy fallow is not an option
What is your major pest problem
Nematodes and/or disease – cover crop Weeds – fallow weed management program
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Fallow Weed Management
Cultivation only Controls annual grass and broadleaf weeds May spread perennial weeds while providing little
control
Herbicide only Controls weeds that will emerge with little disturbance
to soil
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Fallow Weed Management Programs
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Cultural Control of Nutsedge
Yellow and Purple nutsedge underground reproduction by rhizomes and chains of
tubers
Cultivation break nutsedge tuber chain
Glyphosate systemic POST emergent herbicide
Cultivation (break the chain of tubers) followed by glyphosate (kills the tuber that the sprout is growing from)
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Whitefly Management Cover crops
May allow for increase in whitefly population Should not be a host for whitefly transmitted diseases
Fallow weed management program
If timely, should help reduce whitefly populations If timely, should reduce whitefly transmitted diseases
Weedy fallow
Will provide a place for whiteflies to breed May possibly be a sink/source for whitefly transmitted
diseases
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Nutsedge Tuber Production
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Nut
sedg
e sh
oots
/A
ab
Nutsedge count 28 days after no fumigation
C = cultivation, x = followed by, G = glyphosate
a
e
bc
cd d
ab bc
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Nut
sedg
e sh
oots
/A
Nutsedge count 28 days after PicClor 60 fumigation
C = cultivation, x = followed by, G = glyphosate
abc
ab
abc
c c c
a
bc
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Nut
sedg
e sh
oots
/A
Nutsedge count 28 days after Paladin Pic fumigation
C = cultivation, x = followed by, G = glyphosate
bc a b c bc c bc c
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14 Days After Application
Non-treated Control
PicClor-60 at 250 lbs/treated acre Paladin Pic at 50 gal/treated acre
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12 Month Pest Control Program Keep your fields clean
Pests will take refuge on weeds in row middles and field edges
Know your fields Use different programs for different fields
Tailor your off-season programs to target your pests
If you are having problems with virus
Check field edges/old fields
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