1)Fruit Fly: It is serious pest of guava. Females lay eggs below epidermis of young fruits. Later on maggots feed on pulp afterward fruits starts rotting and get drop.
If orchards are having history of fruit fly, avoid taking rainy season crop. Do harvesting at right time. Avoid delay in harvesting. Remove and destroyed infested branches, fruits away from field. Take spray of Fenvalerate@80ml in 150Ltr of water at weekly intervals on fruit ripening. Harvest should be done after third day of spraying.
2)Mealy Bug: They suck sap from different plant parts and thus weaken plant. If infestations of sucking pests like Mealy bug is observed then to control spray with Chlorpyriphos 50EC @300ml/100Ltr of water.
3)Guava Shoot Borer: It is a serious pest of nursery. Infested shoots get dry up.
If infestation is observed, take spray of Chlorpyriphos@500ml or Quinalphos@400ml in 100Litres of water per acre.
4)Aphid: Serious and common pest of Guava. Adult and nymphs, both suck the sap thus weaken the plant. In severe infestation, they cause curling and deformation of young leaves. They secrete honey dew like substance and Sooty, black mould is developed on affected parts.
If infestation is observed to control takes spray of Dimethoate@20ml or Methyl Demeton@20ml per 10Ltr water on new flush.