Synergistic Activity of Binary Mixtures of Insecticides on Tobacco Budworrn (Lepidoptera: Noctuidae) Eggs
- 1 April 1987
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 80 (2) , 333-337
- https://doi.org/10.1093/jee/80.2.333
Abstract
Bioassays were conducted to test ovicidal activity of various insecticides against tobacco budworm, Heliothis virescens (F.). Using a dipping technique, acephate, amitraz, chlordimeform, chlorpyrifos, fenvalerate, methomyl, methyl parathion, monocrotophos, and thiodicarb were compared with a water control. Binary mixtures of the materials were tested for synergism or joint action. Chlordimeform, methomyl, fenvalerate, and thiodicarb exhibited better ovicidal activity than other compounds tested. High synergism in the laboratory strain was observed with the following mixtures: amitraz/methomyl (2.3:1), amitraz/monocrotophos (1:5), amitraz/fenvalerate (5.7:1), amitraz/methyl parathion (1:1), chlordimeform/monocrotophos (1:5), chlordimeform/methomyl (1:4), and chlordimeform/methyl parathion (1:10). In the field strain, high synergism was found with amitraz/methomyl (11.5:1), amitraz/fenvalerate (1:1.5), amitraz/methyl parathion (1:1), and chlordimeform/methyl parathion (1:10).Keywords
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