Population Dynamics of Sucking Pests in Guava Under High Density Planting

The population dynamics of sucking pests of guava under a high-density planting system was studied at the Tamil Nadu Agricultural University, Coimbatore during 2016–2017. The reults revealed that maximum incidence of Aphis gosspii was observed during 13^th standard week (SW) (294.40/ top 3 leaves/ tree), and that of Ferrisia virgata (122.00/ 3 leaves/ tree) during 12^th SW. The maximum counts of Planococcus citri was during the 16^th SW (102.00/ 3 leaves/ tree) and that of Paracoccus marginatus (108/ 3 leaves/ tree) during the 13^th SW, while in case of Bemisia tabaci it was 39^th SW (84.00/ 3 leaves/ tree). There existed a positive correlation with maximum temperature, solar radiation, and a negative one with minimum temperature, relative humidity and rainfall for the incidence of sucking pests.