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August 2008 Where to look - Pests! Insects Nematodes Weeds Diseases Rodents and other small mammals Original Presentation by Virginia Tech Modified by.

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Presentation on theme: "August 2008 Where to look - Pests! Insects Nematodes Weeds Diseases Rodents and other small mammals Original Presentation by Virginia Tech Modified by."— Presentation transcript:

1 August 2008 Where to look - Pests! Insects Nematodes Weeds Diseases Rodents and other small mammals Original Presentation by Virginia Tech Modified by the Georgia Agricultural Education Curriculum Office November 2005

2 August 2008 Basic classification Kingdom Phylum Class Order Family Genus Species Kings Play Chess On Fine Green Silk

3 August 2008 Starting at the beginning: 4 types of Phyla: –Arthropoda ( insects, spiders, mites, millipedes) –Aschelminthes (roundworms) –Platyhelminthes (Flatworms, flukes, tapeworms) –Mollusca (snails, slugs, clams) Arthropoda Phyla is divided into classes: –Crustacea (Crayfish, sowbugs) –Arachnida (spiders, ticks, mites) –Insecta ( bugs, beetles, butterflies)

4 August 2008 Classification cont. Insecta Class is divided into Orders: –Orthoptera (grasshoppers) –Homoptera (aphids) –Coleoptera (beetles) –Lepidoptera (moths, butterflies) –Diptera (flies) –Dermoptera (earwigs) –Hemiptera (true bugs) –Hymenoptera (ants, bees)

5 August 2008 Rules to fall into Classes and Orders Arachnida: –must have 2 body segments or parts –must have 4 pairs of legs –*some mites are major plant pests Insects: –all have three body regions: head, thorax, abdomen –3 pairs of legs –1 pair of antennae –0 to 2 pairs of wings

6 August 2008 Head Body Parts Antennae: segmented, vary in form. –Primarily the smell organ Mouthparts: –rasping-sucking –chewing-lapping –piercing-sucking

7 August 2008 Body Parts Thorax: made of 3 sections, each containing a pair of legs –legs are jointed –used for digging, feeling, swimming, and cleaning Wings - differ for each insect –serve as an identification tool –“-ptera” means with wings

8 August 2008 Metamorphosis Development of the body after birth Gradual (or incomplete) - insect’s life cycle changes from egg through the nymph to adult –nymph, similar to adult except for size and color –aphids, leafhoppers, mole crickets Complete - 4 life stages –egg, larvae, pupae, adult –larvae looks nothing like adult –pupae is a transformation stage –caterpillars-moths, grubs-beetles, maggots-flies

9 August 2008 Beneficial Insects Not all insects are bad for agriculture They help: – pollinate plants – improve soil –destroy harmful insects

10 August 2008 Other types of pests Nematodes Weeds Southern root-knot nematodes on pepper plant roots. This weed is leafy spurge.

11 August 2008 Other types of pests Diseases Rodents and other animals


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