Damage to the head or wrapper leaves often reduces marketability. These pests can cause serious damage to young transplants as well as causing serious leaf feeding damage to older plants. University of Kentucky College of AgricultureĬutworms, imported cabbageworm, cabbage looper, diamondback moth larvae, and cross-striped cabbage worm can be each cause substantial damage to cabbage. Replacing injured plants with new transplants after each damage count appeared to offer means of assessing speed of action of insecticides against cutworms.ENTFACT-300: Cabbage Pests | Download PDF by Ric Bessin, Extension Specialist Treatment differences appeared to be more pronounced when the larvae were confined by barriers than when released into open plots. The treatments in general did not reduce injury to non-economic levels during the first 7 days after the plots were infested. Increasing the rate of application of each, with the exception of Dylox, Guthion, and Sevin, provided increased protection to the flue-cured tobacco. Rates of application were based on relative toxicities determined by laboratory bioassay.The test insecticides in terms of relative effectiveness were rated as follows: endrin > aldrin = dieldrin = heptachlor > DDT = Dylox > Guthion = Sevin. Broadcast spray treatments of eight insecticides were incorporated into Berrien sandy loam soil before planting for control of artificial infestations of the black cutworm, Agrotis ipsilon (Hufnagel), attacking flue-cured tobacco.
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