Control of the Clover Root Curculio on Alsike Clover1

Publisher Website
Google Scholar
Abstract
In Oregon, the clover root curculio, Sitona hispidula (Fabr.), is believed to be a major cause for the decline of alsike clover seed yields. Larvae damage the root system by feeding on root nodules, small secondary fibrous roots, and by gnawing deep cavities in the tap root. Emulsifiable concentrate heptachlor was applied at the rate of 4 pounds of actual toxicant per acre and disced into the soil in an attempt to control larvae as they moved through the soil to the root area of the plant. The application gave almost complete protection to the roots the 1st seed crop year. The percentage of plants attacked in treated plots increased the 2d seed crop year, but injury to roots was not as severe as it was in check plots. There were no marked differences in the incidence or severity of root-rots between treated or check plots.

This publication has 1 reference indexed in Scilit: