Contact toxicity of 14 insecticides tested on pine butterfly larvae

Robert L. Lyon; Sylvia J. Brown

Treesearch

Contact toxicity of 14 insecticides tested on pine butterfly larvae

Informally Refereed

Authors:

Robert L. Lyon, Sylvia J. Brown

Year:

1971

Type:

Research Note

Station:

Pacific Southwest Research Station

Source:

Res. Note PSW-RN-257. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

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Download (PDF 451 KB): https://research.fs.usda.gov/download/treesearch/30780.pdf

Abstract

Fourteen insecticides were evaluated for contact toxicity to 3rd and 4th stage pine butterfly larvae (Neophasia menapia F. & F.) in a laboratory spray chamber. All candidate insecticides except trichlorfon were more toxic than the standard DDT. The ranking of toxicity at LD₉₀ and toxicity indexes (times more toxic than DDT) were: SBP-1382 (117), pyrethrins (62), Dowco 214 (22), methomyl (6.2), chlorpyrifos (6.2), Gardona (4.5), Sumithion (3.8), phoxim (2.8), Zectran (2.4), aminocarb (2.2), malathion (1.6), carbaryl (1.6), DDT (1.0), and trichlorfon (

Keywords

Neophasia menapia, insecticide evaluation, contact toxicity, pyrethrins, SBP-1382, environmental effect

Citation

Lyon, Robert L.; Brown, Sylvia J. 1971. Contact toxicity of 14 insecticides tested on pine butterfly larvae. Res. Note PSW-RN-257. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p