Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Evaluation of certain insecticides against whitefly (Trialeurodes ricini Misra) and jassid (Empoasca kerri Pruthi) infesting castor.

Abstract

A field trial was carried out in Gujarat, India, in 1982-83 to evaluate the effectiveness of 9 insecticides against Trialeurodes ricini and Empoasca kerri on Ricinus communis. The greatest reduction in numbers of both species was obtained with 0.05% monocrotophos after 1 or 2 sprayings (90%), followed by 0.05% dimethoate, 0.05% quinalphos and 0.07% endosulfan after 2 sprayings. The reductions obtained with the latter treatments varied between 70.5 and 83.2%. On the basis of the results, monocrotophos, dimethoate and quinalphos, all at 0.05%, are recommended for controlling the 2 pests on R. communis.