Abstract:
In a field experiment conducted in the red soil of Agricultural College
Farm, Vellayani applying thimet, disulfotan, rnephosfolan and carbofuron
granules at three different levels, applied at the' time of sowing, disulfoton at 1 kgai/ha was found an effective and economic method for controlling pea
aphid upto 5 weeks after sowing. In another field experiment it was observed
that spraying of different insecticides commencing from the time of flowering
along with one application of disulfotan granules at the rate of 1 kg ai/ha at
the time of sowing reduced the incidence of pea aphid and pod borers and
increased the yield significantly. On a benefit cost ratio basis the effective
insecticides could be ranked as follows: f enithion >f enitrothion > monocrotophos >
carbaryl > phosalone > quinalphos.
