Dennis Calvin Odero Vegetable Weed Management. Vegetable production Important to the economy of Palm...
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![Page 1: Dennis Calvin Odero Vegetable Weed Management. Vegetable production Important to the economy of Palm Beach County −Lettuce, sweet corn, green beans, celery.](https://reader036.fdocuments.net/reader036/viewer/2022062421/56649f445503460f94c65c9a/html5/thumbnails/1.jpg)
Dennis Calvin Odero
Vegetable Weed Management
![Page 2: Dennis Calvin Odero Vegetable Weed Management. Vegetable production Important to the economy of Palm Beach County −Lettuce, sweet corn, green beans, celery.](https://reader036.fdocuments.net/reader036/viewer/2022062421/56649f445503460f94c65c9a/html5/thumbnails/2.jpg)
Vegetable production
• Important to the economy of Palm Beach County
−Lettuce, sweet corn, green beans, celery
• Intensive practices including effective weed control options are needed for profitable production of high-value vegetable crops
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Weed management
• Weed management is a very important economic component of vegetable production
• Weed interference− Reduce yield− Reduce quality− Interfere with harvesting efficiency
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Weed control options: Palm Beach
• Growers have a limited number of herbicide options available
• There is need for additional weed control options that will provide selective and consistent control of grass and broadleaf weeds
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Research priorities
• Research to identify herbicides that can control problem weeds− PRE and POST herbicide options
• Incorporate into weed management programs
− Crop sensitivity under our environmental conditions• Important factor for registration of herbicides
− Herbicide rate and timing
• CPWC − Period in the crop growth cycle when weeds must be
controlled to prevent yield losses− Provides a basis for planning effective weed control
strategies in crops
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Integrated Weed Management
• Develop weed management program using a combination of preventive, cultural, mechanical, and chemical practices
• Applying the principles of IWM− Minimize overall economic impact of weeds− Reduce herbicide use− Provide optimum economic returns
• Development of IWM program is based on a few general rules that can be used in any farm
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Prevent weeds before they start
• Best method of weed control is to keep weeds out of the field− Field sanitation – practices that prevent weeds from
entering or spreading across your field− Planting certified seed is a good starting point to
reduce weeds− Control of volunteer weeds along field edges and
ditches− Cleaning equipment before moving from field to field
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Help the crop compete against weeds
• Several things can be done to give the crop an advantage over weeds− Fertilizer placement – placing the fertilizer
where the crop, but not weeds, has access allows the crop to be more competitive
• Banding reduces competitiveness and population density of weeds
− Competitive crop varieties• Taller varieties close the canopy more completely
than shorter types, which helps shade weeds
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Keep weeds of balance
• Don’t give them a chance to adopt− Crop rotation – rotating crops with different life
cycles will help prevent weeds from adapting− Rotating crops allows rotating herbicide
practices
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Making a spray decision
• Scout your field to assess the type and number of weeds to help determine spray operation
• Consider timing of weed emergence relative to the crop growth stage – use the concepts of CPWC and economic thresholds
• CPWC • Cost of delaying weed control• Economic threshold – is the level of weed
infestation at which the cost of weed control equals the increased return on the crop yield
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Spiny amaranth
• Cotyledons linear, dull green to reddish on the upper surface and bright red beneath, hairless• Hypocotyl tinged red and hairless
• 1st true leaves green to red, smooth, alternate, ovate, long stalk, wavy margins• Stems reddish with spines at nodes
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Contact Information
Dennis Calvin Odero
Office
EREC, Belle Glade
Wedgworth Building Room 155
Telephone
561-992-1336 (Office)
307-399-4740 (Cell)