POPULATION DYNAMICS AND MANAGEMENT OF SUGARCANE WOOLLY APHIDS, CERATOVACUNA LANIGERA (ZEHNTNER) (HEMIPTERA : APHIDIDAE) WITH NEW MOLECULES OF INSECTICIDES.

The incidence of Sugarcane Woolly Aphids was found sever in the months of September, October and November, 2011, but later on with increase in maximum temperature and decrease in relative humidity in the month of December, the population of woolly aphids declined Among the insecticides tested the drenching with fipronil 40% + Imidacloprid 40% 80 WG @ 250 g a.i./ha proved to be most effective and superior over the rest of the treatment and recorded highest 78.49 per cent mortality. The treatment with fertera 0.4 G @ 30 g a.i./ha stood second in order of effectiveness recording 74.69 per cent mortality however, it was at par with fipronil 0.3 G @7.5 g a.i/ha which recorded 74.35 per cent mortality. The next best treatment cartap hydrochloride 4G @ 750 g a.i./ha recording 71.02 per cent mortality. This was followed by the treatment with chloropyriphos 10 G, carbofuran 3 G and phorate 10 G in where 68.90, 67.59 and 63.59 per cent mortality is noticed, respectively.