Preventive Weed Control. Weed control practices must be: Effective, economical, practical Safe to...
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Transcript of Preventive Weed Control. Weed control practices must be: Effective, economical, practical Safe to...
![Page 1: Preventive Weed Control. Weed control practices must be: Effective, economical, practical Safe to humans Safe to environment Minimal non-target.](https://reader035.fdocuments.us/reader035/viewer/2022072016/56649ef35503460f94c05b73/html5/thumbnails/1.jpg)
Preventive Weed Control
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Weed control practices must be:
Effective, economical, practicalSafe to humansSafe to environmentMinimal non-target effects
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Objectives of Weed Management
Prevention:
Keeping a weed from being introduced into an uninfested area.
Control:
Suppression of a weed to the point that its economic ( or harmful) impact is minimized.
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Objectives of Weed Management(cont.)
Eradication:
Elimination of all plants and plant parts of a weed from an area (seeds, vegetative propagules, rhizomes, creeping roots, tuber).
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Methods or Strategies of Weed Control
PreventionPhysicalMechanicalCulturalBiologicalChemical
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Preventive Weed Control
Definition –
Those measures taken to prevent or forestall the introduction and spread of weeds.
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Preventive measures include:
Weed-free seed.Competitive crops.Crop rotation and diversity.
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Preventive measures include:(cont)
Manage wind-borne seeds. Weed cleaning equipment. Legal measures – county, state, agency,
national, quarantines.
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Preventive measures include:(cont)
Spot eradication.Clean equipment.Manage feedstuffs and manure.Weed-free waterways and drainage.
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Prevention can be an integration of other methods
Physical – burning, draining, flooding, mulching, sterilization.
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Preventive Weed Control
Definition –
Those measures taken to prevent or forestall the introduction and spread of weeds.
A gram of prevention is worth a kilogram of cure.
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Preventive weed control embraces all practices that
control weeds, with the objective of preventing the introduction or
propagation of weeds in a specified area.
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Methods of Weed control
Four General Principles(simple concepts that underlie all control practices – keep in mind when considering method of control use)
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Methods of Weed control (cont.)
1. Weed control practices depend on the life cycle of the specific weeds (annual, biennial, or perennial – time of germination – when seed matures (must prevent seedling)).
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Methods of Weed control (cont.)
2. Weed control practices will depend on the habitat (where the weed is growing) of the weed (corn field – cultivate; grain field – spray; pasture – mow; wasteland – sterilization; good land vs. poor land – economics).
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Methods of Weed control (cont.)
3. Weed control practices will depend on the size, density, and age of the infestation (small intensive patch (expensive) – large patch – extensive acreage).
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Methods of Weed control (cont.)
4. Weed control methods depend on prevailing farm practices and available equipment (depends on the individual farmer and his past experience).