., .
(1981)
Insecticide tests for control of the western bean cutworm.
Other.
Agricultural Research (Western Region), Science and Education, USA.
Abstract
A series of laboratory and field tests was carried out in southern Idaho from 1950 to 1980 on the insecticidal control of Loxagrotis albicosta (Sm.) on beans (Phaseolus vulgaris) and sweet maize. Of 53 compounds evaluated in the laboratory, 24 were found to be as effective as, or more effective than, the standards DDT and carbaryl. When sprays of 26 compounds were applied by ground equipment to beans, 7 that were tested extensively were found to be equal to or better than carbaryl and 9 that were less extensively tested were found to be highly effective. Permethrin was the most effective compound as an aerial spray to sweet maize, giving almost complete control at rates of 0.1 or 0.2 lb a.i./acre. Although 3 formulations of carbaryl did not differ significantly in their performances in individual tests, newer formulations (such as SL-2) appeared to be an improvement. Insecticide effectiveness decreased as the time between application and peak moth flight increased; this was due to a combination of increased larval size and increased foliage density
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