1. August 2008 KEEPING PLANTS HEALTHY CHAPTER 10 AGRISCIENCE AND TECHNOLOGY Modified by Georgia Agricultural Education Curriculum Office July, 2002

2. August 2008 FIVE MAJOR CATEGORIES OF PESTS INSECTS NEMATODES DISEASES WEEDS RODENTS

3. August 2008 CHARACTERISTICS OF INSECTS Insects have three pair of legs. Insects body is divided into three sections: head, thorax and abdomen. The legs and wings, if any, are on the thorax. The abdomen usually has no attachments.

4. August 2008 TWO TYPES OF MOUTH PARTS CHEWING : Bite off, chew and swallow parts of plants; examples include cutworms, bean beetles and armyworms. SUCKING : Suck sap from a plant; examples include aphids, chinch bugs, thrips, squash bugs and leafhoppers.

5. August 2008 METAMORPHOSIS FOUR STAGES 1. EGG 2. LARVA 3. PUPA 4. ADULT Examples of insects with complete metamorphosis include moths and butterflies, beetles and boll weevils.

6. August 2008 INCOMPLETE METAMORPHOSIS 1. EGG 2. NYMPH 3. ADULT EXAMPLE IS A GRASSHOPPER

7. August 2008 WAYS INSECTS ARE BENEFICIAL IMPROVE THE SOIL - Allow air to enter the soil or bury decaying parts of plants: ants,wild bees and beetles. HELP POLLINATE PLANTS - Spread pollen from plant to plant: bees, butterflies, wasps and beetles. DESTROY INSECTS - Attack and destroy harmful insects: lady beetles, dragon flies, wasps and ants.

8. August 2008 NEMATODES Nematodes are tiny worm-like organisms that live in the soil and attack the roots and stems of plants. Accurate identification requires laboratory testing. Nematodes are carriers of certain diseases.

9. August 2008 MAJOR TYPES OF PLANT DISEASES ENVIRONMENTAL 1. Nutrient deficiencies 2. Damage to plant parts 3. Chemical injuries 4. Pollution injuries 5. Weather 6. Naturally-occurring genetic abnormalities PARASITIC 1. Fungi 2. Bacteria 3. Viruses

10. August 2008 KINDS OF WEEDS ANNUALS - Morning glory, cocklebur, pigweed, crabgrass, chickweed and henbit are examples. BIENNIALS - Thistle and wild carrot are two examples. PERENNIALS - Dandelion, plantain, bermudagrass, poison ivy and johnsongrass are examples.

11. August 2008 PROBLEMS THAT WEEDS CAUSE Keep plants from growing Waste nutrients Lower quality of crop Make harvesting harder Hiding place for insects and disease Look bad

12. August 2008 RODENTS EXAMPLES OF DAMAGE ARE: Deer that eat soybean plants growing in a field. Raccoon that climb corn stalks and get roasting ears. Rabbits that bit off the tender leaves of new bean plants. Birds that eat grain from sorghum. Rats that eat fruit growing near the ground.

13. August 2008 CONDITIONS NEEDED FOR A PEST TO CAUSE PROBLEMS A PEST MUST EXIST A SUSCEPTIBLE PLANT THE RIGHT ENVIRONMENT

14. August 2008 WAYS THAT PESTS DAMAGE PLANTS Pests chew holes in plants Pests attack the vascular system Pests attack the fruit Pests contaminate products Pests rob plants of food Pests damage land

15. August 2008 HOW DAMAGE AFFECTS THE PRODUCER Reduced yields Lower quality Increased production costs Hiding place for pests Restrict Marketing

16. August 2008 WAYS TO PREVENT PEST PROBLEMS Use good seed Destroy diseased plants Use the right fertilizer Disinfect equipment Use good water Control animal movement Use chemicals properly Use tests to check for pests

17. August 2008 MECHANICAL METHODS OF PEST CONTROL PLOWING MOWING MULCHING

18. August 2008 CULTURAL PRACTICES ROTATING CROPS ROGUING TRAP CROPPING BURNING USING RESISTANT VARIETIES CLEANING AROUND FIELDS

19. August 2008 PESTICIDES Chemicals used to control pest Insecticides - controls insects Nematocides - controls nematodes Fungicides - controls fungi Bactericides - used to control bacteria Herbicides - used to control weeds

20. August 2008 TYPES OF INSECTICIDES STOMACH POISONS - Eaten by the insect CONTACT POISONS - Absorbed through the insect’s skin SYSTEMIC POISONS - Poison is absorbed by the plant and when insects bites or sucks its juice, it gets poison. FUMIGANTS - Enter the insect’s body through the respiratory system

21. August 2008 TYPES OF HERBICIDES SELECTIVE HERBICIDES - Will only kill certain kinds of plants. NON-SELECTIVE HERBICIDES - Used to kill all vegetation where they are applied. TRANSLOCATED HERBICIDES - Absorbed into the plant and moved all through its parts; upset the growth process of weeds.

22. August 2008 NON-CHEMICAL MEANS OF CONTROLLING PESTS BIOLOGICAL PEST CONTROL - Using living organisms to control pests. GENETIC METHODS - Develop crops that are resistant to pests

23. August 2008 IPM INTEGRATED PEST MANAGEMENT is a planned process for controlling pests. Involves using a blend of pest control techniques in a planned program Field of crops is managed as an ecosystem IPM has fewer adverse effects on the environment.

24. August 2008 SAFETY PRACTICES IN PEST CONTROL Use only approved pesticides Know the pesticide Use the pesticide with low toxicity Use pesticides only when needed Do not contaminate resources Wear protective clothing

25. August 2008 SAFETY PRACTICES IN PEST CONTROL Wash the skin after contact Dispose of empty containers properly Apply in good weather Use the right equipment Know the emergency measures