Experiments for the Control of a Juniper Tip Midge

Publisher Website
Google Scholar
Abstract
The larvae or a midge, Oligotrophus sp., that occupy and feed in the tips of the growing buds of canaert juniper, Juniperus virginiana canaerti Sénécl., cause the tips to die and the growth of the plants to be retarded. The overwintering larvae complete development in the spring and pupate. At Urbana in 1962, firstbrood adults emerged in early May. Additional broods of adults followed at intervals of about 6 weeks. Soil applications of phorate were ineffective against the insect, but technical SD-3562 (3-(dimethoxy-phosphinyloxy)-N, N-dimethyl-cis-crotonamide) diluted with water and injected into the soil near the plants was highly effective. As a spray naled (64.5%) 1 qt. per 100 gal. or water gave only fair control. Excellent control was obtained with sprays containing 1 pt. and 1 qt. or dimethoate (43.5%) per 100 gal. of water.

This publication has 0 references indexed in Scilit: