![]() ![]() Replacing injured plants with new transplants after each damage count appeared to offer means of assessing speed of action of insecticides against cutworms. 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. Several compounds within the pyrethroid, organophosphate, carbamate, and diamide groups are labeled for post plant/post-emerge cutworm control. Increasing the rate of application of each, with the exception of Dylox, Guthion, and Sevin, provided increased protection to the flue-cured tobacco. Fortunately, cutworms are controlled well with rescue insecticide applications and many post-plant insecticide products provide effective control of black cutworms. 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. Control may be poor, regardless of the insecticide used, if the topsoil is dry and crusted and the cutworms are active below the soil surface. PDF The cutworm, Spodoptera litura is an important pest of cruciferous vegetables and it causes economic impact worldwide. decis protech EISDownloadPDF (119 KB) decis protech Tank MixDownloadPDF (183 KB). 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. A broad spectrum pyrethroid insecticide for the control of aphids. ![]()
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