Contact toxicity of 40 insecticides tested on pandora moth larvae

Robert L. Lyon

Treesearch

Contact toxicity of 40 insecticides tested on pandora moth larvae

Informally Refereed

Authors:

Robert L. Lyon

Year:

1971

Type:

Research Note

Station:

Pacific Southwest Research Station

Source:

Res. Note PSW-RN-235. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

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Download (PDF 414 KB): https://research.fs.usda.gov/download/treesearch/30949.pdf

Abstract

Forty insecticides and an antifeeding compound were tested on pandora moth larvae (Coloradia pandora Blake) in the second and third instars. A total of 21 insecticides were more toxic at LD₉₀ than DDT, providing a good choice of candidates for field testing. Ten exceeded DDT in toxicity tenfold or more. These were, in descending order of toxicity at LD₉₀: pyrethrins, tetramethrin, Zectran MA (a degradation product of Zectran), Dursban, N-4543, allethrin, aminocarb, B-10119, Zectran, and dichlorvos. Pyrethrins, more toxic by an order of magnitude than the second place candidate, appear to be especially promising.

Keywords

Coloradia pandora, insecticides, toxicity tests, pyrethrins, pyrethroids

Citation

Lyon, Robert L. 1971. Contact toxicity of 40 insecticides tested on pandora moth larvae. Res. Note PSW-RN-235. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p