Pacific Southwest

Title: Contact toxicity of 14 insecticides tested on pine butterfly larvae

Author: Lyon, Robert L.; Brown, Sylvia J.

Date: 1971

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

Station ID: RN-PSW-257

Description: 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 (<1.0).

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

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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.