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 13th standard week (SW) (294.40/ top 3 leaves/ tree), and that of Ferrisia virgata (122.00/ 3 leaves/ tree) during 12th SW. The maximum counts of Planococcus citri was during the 16th SW (102.00/ 3 leaves/ tree) and that of Paracoccus marginatus (108/ 3 leaves/ tree) during the 13th SW, while in case of Bemisia tabaci it was 39th 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.