Relative efficiency of some foliar insecticidal treatments for the control of Helopeltis antonii signoret infesting cashew trees

Abstract

The relative field efficiency of endosulfan (0.05%), phosphamidon (0.03%), carbaryl (0.15%), quinalphos (0.05%), monocrotophos (0.05#), fentnion (0.05#) fenitrothion (0.05%), phosalone (0.1$) and formothion (0.05$) against Helopeltis antonii Signoret (Hemiptera; IVIiridae) was evaluated in a field experiment conducted in the Cashew Research Station, Vellanikkara during the flushing and fruiting seasons (October-February of three years, namely, 1978-79, 1980-81 and 1981-82). Three rounds of high volume sprayings were given, synchronising with the emergence of flushes, flowering and fruit initiation stages and the intensity of damage was scored on a 0-4 scale based on observations on twenty randomly selected shoots and panicles. Endosulfan (0.05%), carbaryl (0.15%), phosphamidon (0.03%) and quinalphos (0.05%) were found to be relatively more effective in reducing shoot and floral infestations.