Control of a Jeffrey Pine Needleminer by Spraying and Trunk Implantation and Resultant Acephate Residues1

Publisher Website
Google Scholar
Abstract
Experiments were performed in 1975, 1976, and 1977, for control of larvae and needle mining of Coleotechnites near milleri (Busck) in southern California by utilizing 19 insecticides and 3 application methods. Needle acephate residues were recorded and interpreted for 1976 and 1977 experiments. Acephate sprays and trunk implants were very effective against larvae; dimethoate implants were effective against larvae. Acephate spray residues degraded rapidly initially, whereas solution implant residues increased rapidly, and Medicap® implant residues increased slowly. Increasing larval mortalities and implant residues suggested ca. 4 wk should elapse before acephate mortality determinations. Permethrin spray was very effective in preventing 1st-instar mines; resmethrin was ineffective; and against older larvae, sprays of Pydrin® (benzeneacetic acid, 4-chloro-alpha-(1-methylethyl)-, cyano(3-phenoxyphenyl) methyl ester) or Decis® (S-alpha-cyano-3-phenoxybenzyl d-cis-3-(2,2-dibromovinyl)-2,2-dimethyleyclopropanecarboxylate) were effective. Phosmet spray was effective in preventing 1st-instar mines but ineffective against 4th instars. After 4 wk, malathion spray was less effective against 2nd and 3rd instars than acephate spray. Fenitrothion spray was effective against 4th instars.

This publication has 1 reference indexed in Scilit: