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WEED CONTROL

WEED CONTROL. What is a Weed??. What is a Weed?. A weed is a plant growing where it is not wanted. Ex. Red rice, Giant Ragweed. How do weeds affect us??. 2-Brainstorm….What are some affects of weeds on our everyday life?. 6 Ways Weeds affect Humans. Housing pest Impurities in crops

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WEED CONTROL

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  1. WEED CONTROL

  2. What is a Weed??

  3. What is a Weed? • A weed is a plant growing where it is not wanted. • Ex. Red rice, Giant Ragweed

  4. How do weeds affect us?? 2-Brainstorm….What are some affects of weeds on our everyday life?

  5. 6 Ways Weeds affect Humans • Housing pest • Impurities in crops • Poisonous • Allergies • Costly • Aesthetic • Impure seed products

  6. 6 ways weeds affect humans Housing insects and disease. Impurities in agriculture products. Ex.-red rice causes lower yields. Poisonous to livestock. Allergic reactions-common ragweed

  7. Why do weeds cost $$? Competition for water and nutrients. Competition reduces crop yields. Expense of herbicides. Contamination of seeds Aesthetics

  8. How do weeds compete with crops? • Uses nutrients intended for crops. • Competes for growing space. • Interferes with harvest. • Crowds out crops and allows for crop loss.

  9. Review Define weed The effects of competition on the crop or yields The effects of weeds on humans and livestock Theaesthetic effects of weeds in home yards and public areas The economic effects on crop yields.

  10. Identifying Weeds • Weeds can be classified based upon their: • Lifecycle • Persistence • Leaf Structure

  11. Weed Lifecycles • Annuals- • Grow from seed and complete their life cycle in one growing season • Biennials- • Complete their life cycle in two growing seasons • Perennials • Require two or more years to complete their lifecycle

  12. Persistence • Common Weeds: • These are more persistent and may or may not be vigorous. • Cause serious problems to farmers because they reoccur so often • Mostly annuals • Noxious Weeds: • Most undesirable • Persistent growth makes them hard to control • Leaf Structure: • Grasses • Broadleaf

  13. Identifying Common Weeds • Weed ID Project • You must collect 15 different common weeds • Label each weed, identifying their: • lifecycle • Persistence • leaf structure.

  14. Review • Major Weed Categories: • Lifecycle • Annual • Biennial • Perennial • Persistence • Common • Noxious • Leaf structure • Weed ID Project

  15. Student Learning Objective • Describe the methods of weed control. • Determine the use of chemicals to control weeds. • Explain alternative methods of weed control. • Describe methods of weed management.

  16. Methods for weed control 1. Mechanical: hand pulling, hoeing, tractor cultivation, etc. 2. Biological: using parasites, predators, genetic engineering, etc 3. Cultural: cropping practices, host resistance, sanitation, varying planting dates 4. Chemical controls: use of herbicides. • Herbicides are classified as either: - Selective - kill only certain types of plants - Nonselective - kill all plants they come in contact with - Herbicides are classified further according to the time they are applied. - Pre-emergent - Post-emergent

  17. What is the most common control practice? Why? • Chemical control is still the most popular form.

  18. What information must be listed on a pesticide label?

  19. Brand, trade, or product name Ingredient statement Manufacturer Registration number Establishment number Classification statement Directions for use Signal words and symbol Precautionary statements What information must be listed on a pesticide label?

  20. What information must be listed on a pesticide label? • Statement of practical treatment • Environmental hazard statement • Re-entry statement • Storage and disposal statement

  21. Mixing and Loading Pesticides • Follow all instructions provided on the pesticide label. • The most serious pesticide poisonings occur during mixing and loading.

  22. Protective Clothing and Equipment • Refer to the pesticide label to determine the proper protective clothing and equipment to use. • Look for the signal words on the label. • Caution • Warning • Danger

  23. Applying Pesticides • Some pesticides require extra personal protective equipment. • This is why it is important to follow all information provided on the label.

  24. Alternative Methods of Weed Control • Hoeing and hand weeding • Use of mulch to smother weeds • Cultivating • Mowing • Burning

  25. Disadvantages of Alternative Weed Control • Labor intensive • Unrealistic for large crops and pastures

  26. Integrated Pest Management(IPM) • Used to: • Manage crop diseases • Managing insect pests • Managing weeds

  27. What information must be listed on a pesticide label? • Brand, trade, or product name • Ingredient statement • Manufacturer • Registration number • Establishment number • Classification statement • Directions for use • Signal words and symbol • Precautionary statements

  28. What information must be listed on a pesticide label? • Statement of practical treatment • Environmental hazard statement • Re-entry statement • Storage and disposal statement

  29. Weeds Classed According to Lifecycle • Annuals • Biannuals • Perennials

  30. Weeds Classed According to Plant Type • Grasses • Broad Leaves • Sedges

  31. Weeds Classed According to Persistence • Common Weeds • Noxious Weeds

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