Effect of acidification of insecticide sprays in pest control of sugar beet seedlings

Authors

• Anna-Liisa Varis University of Helsinki, Department of Agricultural and Forest Zoology

DOI: https://doi.org/10.23986/afsci.71923

Abstract

The pH of dimethoate, formetanate and methidathion insecticide spray liquids was reduced from 8.0 to 4.0 by adding 0.1 M H3PO4. Acidification did not improve the effectiveness of sprays against Lygus rugulipennis, Chaetocnema concinna or Piesma maculatum. There were also no significant differences in root or top yields between plots treated with acidified insecticides and the incecticides alone.