Population dynamics of hoppers and thrips on mango

Pest calendar of hoppers and thrips on mango in Gujarat when observed revealed that the mango hopper complex was observed throughout the year. Maximum populations were observed from flower initiation or panicle emergence to the stone-sized fruits stage. A population density of 8.46 hoppers/panicle observed on 14th standard week (SW) coinciding with stone sized fruit stage was found positively influenced by maximum temperature, sunshine and evaporation. There existed a negative correlation with relative humidity (evening and average), wind velocity and rainfall. As regards thrips, maximum population on flower (43.33/panicle) and foliage (29.46/twig) was observed on 15th and 42nd SW coinciding with stone sized fruit and emergence of new flush stages, respectively. The thrips incidence was observed to be positively influenced by maximum temperature, sunshine, and negatively with minimum temperature, relative humidity, wind velocity and rainfall.