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.
