Laboratory and Field Studies on the Effectiveness of Some Insecticides in Controlling the Armyworm12
| Autor: | W. W. Sans, S. A. Turnbull, Carol Harris, H. J. Svec |
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| Rok vydání: | 1975 |
| Předmět: | |
| Zdroj: | Journal of Economic Entomology. 68:513-516 |
| ISSN: | 1938-291X 0022-0493 |
| DOI: | 10.1093/jee/68.4.513 |
| Popis: | In primary laboratory screening tests, the effectiveness of 30 insecticides applied by direct contact to 3rd stage larvae was assessed relative to carbaryl for control of Pseudaletia unipuncta (Haworth). Many of the insecticides were more effective than carbaryl. Methomyl, chlorpyrifos, chlorphoxim, and parathion were the most toxic ovicides tested. Eggs and early stage larvae were most susceptible to methomyl, chlorpyrifos, and chlorphoxim, while later stage larvae, pupae, and adults became increasingly tolerant. Five promising insecticides were field-tested using micro plots planted with sweet corn and infested with laboratory-reared larvae, with carbaryl being included for comparison. Carbofuran G applied as a band application at 3.36 kg/ha did not provide adequate control. Methomyl, chlorpyrifos, leptophos, carbofuran, and WL 24073 ( O -(2-chloro-2,5-dichlorophenyl) vinyl) O -methyl ethylphosphonothioate) applied as broadcast sprays at 0.28 to 0.56 kg/ha were as or more effective than carbaryl at 2.24 kg/ha. None of the treatments was phytotoxic. No residues of chlorpyrifos, chlorpyrifos-oxon, leptophos, leptophos-oxon, or carbaryl were detected on the corn at harvest. |
| Databáze: | OpenAIRE |
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