ENTM 206 Final Part II

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Author:
MRK
ID:
250473
Filename:
ENTM 206 Final Part II
Updated:
2013-12-03 13:55:06
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Description:
Comdety Crops
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  1. alfalfa weevil
    Common Name/Order
    metamorphosis
    unique anatomical features of pest
    life history of pest
    damaging stage(s) of pest
    commodities attacked
    type of damage caused by pest
    control measures (general)
    • Coleoptera
    • holometabolous
    • All stages of larvae have curved bodies and shiny black heads // Adults are light brown with a dark brown stripe along middle of back and the head projects forward as a short snot
    • Overwinter as adults and opposite in stem of alfalfa, inactive during the summer then active again in fall
    • primarily by the larval stage of the weevil
    • alfalfa some clover
    • feed on growing tips, buds, foliage.  Makes the field look gray and reduces yeild
    • IPM- cultural practices, protect beneficial, resistant varieties and chemical applications
  2. Black Cutworm
    Common Name/Order
    metamorphosis
    unique anatomical features of pest
    life history of pest
    damaging stage(s) of pest
    commodities attacked
    type of damage caused by pest
    control measures (general)
    • Lepidoptera
    • Holometabolous
    • Forewings have a kidney-shaped structure and three black dashes // larvae is light gray to black
    • Overwinters as a pupa, adults mate and lay eggs on plants, go to soil.  45-55 day cycle, 2-3 per year
    • larvae
    • attack seedlings of corn, tobacco, vegetables
    • chew on leaves and holes through stalks, feed at night
    • Insecticides main, pre-plant weed control
  3. Corn Earworm
    Common Name/Order
    metamorphosis
    unique anatomical features of pest
    life history of pest
    damaging stage(s) of pest
    commodities attacked
    type of damage caused by pest
    control measures (general)
    • Lepidoptera
    • Holometabolous
    • larvae are several colors, light brown head capsule // adults have irregular wing makings with dark comma shape on males
    • lay eggs in silk and larvae crawl into the ear and feed // early and late south and late corn in north
    • larvae
    • Corn, tomato, cotton, beans, alfalfa, and tobbacco
    • tips of ears, fruit and pods
    • tolerate damage or spray silk
  4. Corn Leaf Aphid
    Common Name/Order
    metamorphosis
    unique anatomical features of pest
    life history of pest
    damaging stage(s) of pest
    commodities attacked
    type of damage caused by pest
    control measures (general)
    • Homoptera
    • Paurometabolous
    • cornicles // legs and cornicles are black // bodies are green
    • South hurt in the winter // 9 generations in North, 50 in south // population goes down after tassel // carries barley yellow dwarf and maize dwarf mosaic
    • Adults and nymphs
    • corn barely, sorghum, and other members of the grass family
    • honeydew may interfere with pollination, mottled and yellow patches
    • plant corn early, specific hybrids, and insecticides
  5. European Corn Borer
    Common Name/Order
    metamorphosis
    unique anatomical features of pest
    life history of pest
    damaging stage(s) of pest
    commodities attacked
    type of damage caused by pest
    control measures (general)
    • Lepidoptera
    • Holometabolous
    • males darker than female, young larvae have black head pale yellow body with black spots, older gray to light brown
    • Overwinter as larvae, 3 generations
    • Larvae- different generations hit different corn
    • corn, peppers, snap beans, etc.
    • feeding in whorl = shot holes and matures into stalk
    • First generation easiest to control with insecticide- apply on time, hybrids, monitor flights, transgenic
  6. Grasshoppers
    Common Name/Order
    metamorphosis
    unique anatomical features of pest
    life history of pest
    damaging stage(s) of pest
    commodities attacked
    type of damage caused by pest
    control measures (general)
    • Orthoptera
    • paurometabolous
    • enlarged femur, specific coloration
    • Eggs overwinter in uncultivated areas, hatch may-july, usually one generation a year
    • Adults and nymphs
    • small grain, corn, alfalfa, clover, soybean, cultivated crops
    • damage seedlings, defoliation, reduced fertilization
    • IPM on number insecticides
  7. Western Corn Rootworm
    Common Name/Order
    metamorphosis
    unique anatomical features of pest
    life history of pest
    damaging stage(s) of pest
    commodities attacked
    type of damage caused by pest
    control measures (general)
    • Coleoptera
    • Holometabolous
    • Adults are yellow-green with 3 dark stripes // larvae is small and white
    • Larvae in soil until mid summer than adults come up and mate
    • most damage from larve
    • corn, foxtail, wither wheat, Omugi barley
    • tunnel inside roots- reduces development lodgeing
    • cultural (crop rotation) and chemical, transgenic

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