Pacific Southwest

Title: Toxicity of aerosols to larch casebearer larvae

Author: Lyon, Robert L.; May, Margaret E.

Date: 1970

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

Station ID: RN-PSW-208

Description: 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

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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.