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Insect Identification for ND Agronomy CDE. Insect Identification, Life Cycle, Economic Impact, and Mouth Parts Authored by: Seneca HS, AR Adapted by: Jeff Stachler. What do you need to know?. Life Cycle Complete Egg, larva, nymph, adult Each stage is uniquely different Incomplete
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Insect Identification for ND Agronomy CDE Insect Identification, Life Cycle, Economic Impact, and Mouth Parts Authored by: Seneca HS, AR Adapted by: Jeff Stachler
What do you need to know? • Life Cycle • Complete • Egg, larva, nymph, adult • Each stage is uniquely different • Incomplete • Egg, nymph, adult • Gradual change with young looking similar to adult • None
Are all specimens in the Insect Identification Section insects?? Kingdom (Animal) Phylum (Arthropoda) Class (Hexapoda / Insecta) Order (Hymenoptera) ?? Family (Apidae) Genus (Apis) Species (mellifera)
Arthropod Classification • Classes (2) • Arachnida • Mites, Spiders, ticks, scorpians, other related • Hexapoda (Insecta) • Insects
Arachnida • Bodies: two distinct regions • cephalothorax • abdomen • Legs: Four pairs attached to cephalothorax • Other: Lack wings and antennae • Order: Acari • Specimen: Spider mite
Spider Mite • Life Cycle: Incomplete • Economic Impact: Removal of plant fluids • Mouth Part: • Piercing-sucking
Class Hexapoda (Insecta) Insect Characteristics • Most adult insects have the following characteristics: • A body divided into three parts (head, thorax and abdomen) • Three pairs of legs • Usually one pair of antennae and a pair of compound eyes (a few exceptions to these characteristics are found) • Usually two pairs of wings (absent in many insects such as lice, fleas, ants; flies have one pair of wings)
Orders • Orthoptera • Crickets, grasshoppers • Hemiptera • “true” bugs, aphids • Thysanoptera • Thrips • Neuroptera • Lacewing
Orders • Coleoptera • Beetles, weevils • Diptura • Flies • Lepidoptora • Moths, Butterflies • Hymenoptora • Bees
Alfalfa Weevil Larva stage
Alfalfa Weevil • Life Cycle: Complete • Economic Impact: Destruction of Vegetative Parts
Aphids • Life Cycle: Incomplete • Economic Impact: Destruction by removal of plant fluids
Armyworm Larva • Life Cycle: Complete • Economic Impact: Destruction of vegetative parts
Bean Leaf Beetle • Life Cycle: Complete • Economic Impact: Destruction of vegetative parts
Blister Beetle • Life Cycle: Complete • Economic Impact: Destruction of fruit/flower • Destruction of vegetative parts
Corn Earworm Larva • Life Cycle: Complete • Economic Impact: Destruction of fruit/flower
Corn Rootworm Larva • Life Cycle: Complete • Economic Impact: Destruction of vegetative parts
Cricket • Life Cycle: Incomplete • Economic Impact: Destruction of vegetative parts • None or predatory • Destruction of indoor fibers
Cutworm Larva • Life Cycle: Complete • Economic Impact: Destruction of vegetative parts • Destruction of fruit/flower
European Corn Borer Larva • Life Cycle: Complete • Economic Impact: Destruction of vegetative parts • Destruction of fruit/flower
Flea Beetle • Life Cycle: Complete • Economic Impact: Destruction of vegetative parts
Grain Weevil • Life Cycle: Complete • Economic Impact: Destruction of fruit/flower
Grasshopper • Life Cycle: Incomplete • Economic Impact: Destruction of vegetative parts • Destruction of fruit/flower
Green Lacewing • Life Cycle: Complete • Economical Impact: Adult: Feed on pollen, plant nectar, and aphid honeydew • Larva: None or predatory
Honeybee • Life Cycle: Complete • Economic Impact: None or predatory
Japanese Beetle • Life Cycle: Complete • Economic Impact: Destruction of vegetative parts • Destruction of fruit/flower
Lady Beetle Larva • Life Cycle: Complete • Economic Impact: None or Predatory
Leafhopper • Life Cycle: Incomplete • Economic Impact: Destruction by removal of plant fluids
Scale • Life Cycle: Incomplete • Economic Impact: Destruction by removal of plant fluids