Interactions Between Temperature and Toxicity of Four Insecticides Applied by Injection
- 1 October 1950
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 43 (5), 663-669
- https://doi.org/10.1093/jee/43.5.663
Abstract
Milkweed bugs, Oncopeltus fasciatus. were injected with insecticides and stored for 24 hrs. at temps. of 10, 15, 22 and 29[degree]C. Nicotine was more toxic to nymphs than to adults, but toxicities increased with temp. in both. DDT produced a positive temp. coefficient between 10[degree] and 22[degree] C and a negative temp. coefficient between 22[degree] and 29[degree] C. With sodium azide, a fast-killing chemical, about equal mortality was recorded at all temp. with adults; with nymphs, mortality was reduced at low temp. Nymphs were more resistant than adults. Rotenone showed relatively no recovery of paralyzed individuals; high temp. caused greater toxicity than low.Keywords
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