Toxicity of aerosols to larch casebearer larvae

Robert L. Lyon; Margaret E. May

Treesearch

Toxicity of aerosols to larch casebearer larvae

Informally Refereed

Authors:

Robert L. Lyon, Margaret E. May

Year:

1970

Type:

Research Note

Station:

Pacific Southwest Research Station

Source:

Res. Note. PSW-RN-208. Berkeley, CA: US Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4p

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Download (PDF 540 KB): https://research.fs.usda.gov/download/treesearch/30772.pdf

Abstract

Six insecticides were tested in the laboratory as aerosols against larch casebeare1 larvae. Their toxicity was determined by both direct contact and residual contact on filter paper. All six were highly toxic at less than 1.05 µg/ cm² (the equivalent of 1.5 oz./acre). In decreasing order of toxicity at LD₉₀ (direct contact) the insecticides tested were: Zectran, malathion, Sumithion (0.24 - .26 oz./acre), pyrethrins, Matacil (0.45 - .5O oz./acre), and Gardona (1.4 oz./acre). For field trial of the three most toxic materials, a dosage of 2 oz./acre is suggested.

Keywords

Coleophora Imicella, insecticides, aerosols, Zectran, malathion, Sumithion, Matacil, Gardona, toxicity tests

Citation

Lyon, Robert L.; May, Margaret E. 1970. Toxicity of aerosols to larch casebearer larvae. Res. Note. PSW-RN-208. Berkeley, CA: US Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4p