Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya Mohanpur, Nadia - 741 252, West Bengal, India
The population of P. demoleus was recorded from February to May however it was absent from mid November to early February and in June while Phyllocnistis citrella was active throughout the year except from early December to mid February. In both cases population was positively correlated with maximum, minimum and mean temperatures.
