Preliminary studies on the control of mango-hoppers by stem injection with systemic insecticides.
Thontadarya T. S., Viswanath B. N., Hiremath S. C.
Author Affiliation: Department of Entomology, College of Agriculture, University of Agricultural Sciences, Dharwar, Karnataka, India.
Current Science 47 :378
Abstract : Dimethoate was injected at the rate of 0.5 ml toxicant/cm girth of trunk into mango trees at Dharwar in the Indian State of Karnataka for the control of Amritodus atkinsoni (Leth.), Idioscopus clypealis (Leth.) and Chunrocerus niveosparsus (Leth.] (I. niveosparsus). Population counts were made on both treated and untreated trees before and after treatment, daily for a week and at weekly intervals thereafter. Population numbers began to decline from the third day after treatment and continued to do so for 3 weeks. After the fourth week they increased slightly but remained at less than one-tenth of the population on untreated trees for up to 8 weeks; this level of population caused only slight damage up to the completion of fruit setting.