Control Methods and Key Technical Points for the Peach Fruit Borer in Plum Trees
Symptoms: The hatched larvae bore into the fruit from the base of the fruit stalk, tunnel along the pit into the fruit to feed, and the gum flowing from the bore hole together with the brown frass excreted by the larvae sticks to the fruit surface, causing the tunnel to overflow with frass and making the fruit unfit to eat. Control method: During the peak egg-laying periods of the first and second generations of adults in April to May, when most of the eggs on the fruit turn red, promptly spray 2.5% deltamethrin at 2500 times dilution, 50% phoxim emulsifiable concentrate at 1000 times dilution, or 40% omethoate at 1000 times dilution.
Symptoms
The hatched larvae bore into the fruit from the base of the fruit stalk, tunnel along the pit into the fruit to feed, and the gum flowing from the bore hole together with the brown frass excreted by the larvae sticks to the fruit surface, causing the tunnel to overflow with frass and making the fruit unfit to eat.
Control Methods
During the peak egg-laying periods of the first and second generations of adults in April to May, when most of the eggs on the fruit turn red, promptly spray 2.5% deltamethrin at 2500 times dilution, 50% phoxim emulsifiable concentrate at 1000 times dilution, or 40% omethoate at 1000 times dilution.