Rates, application intervals and rotation of four granular pesticides to control nematodes and the corm-weevil (Cosmopolites sordidus Germar) in plantain

Abstract

The efficacy of the nematicide-insecticides aldicarb, carbofuran, ethoprop and phenamiphos was studied in plantain using recommended and lower label rates, shorter application intervals and rotation. These compounds were effective in reducing Radopholus similis and Pratylenchus coffeae populations when lower than recommended rates were applied at the shortened interval of four months or when the chemicals were rotated. Except for ethoprop, these compounds were also effective in controlling the corm-weevil when applied at below recommended label rates and intervals. However, the insecticide efficacy of phenamiphos and the rotation of aldicarb, phenamiphos and carbofuran was particularly high when applied at planting time and every six months thereafter. Yield components were not significantly affected by the various nematicide-insecticide treatments in the plant crop.