Mango stone weevil (Sternochetus mangiferae, curculionidae ,coleoptera)

Damaging stage :- grub

Damaging symptom:-

• Feed pulp and stone (seed coat) and later damaged cotyledon
• No external symptoms

Identification :-

• Egg:– Laying egg at the fruit skin making small cut on fruit surface ( marble size )
• Grub:– Bore into embryo of mango ,stone ,legless with brown head and white body , C- shaped .
• Pupa :- inside stone .
• Adult :– Short ,stoutly build , dark brown weevil .

Life cycle :-

Egg–5-7 days–> grub —4-5 weeks—> Pupa –7 days–> Adult

Management:-

• Collect and destroy all fallen fruit and neevil damaged mark
• Acephate 75 SP @1.5 g/l .when fruit are marble size .
• Decamethrin 8 @ 1ml/l