(A) and body shape to identify hazards
Against the blade. Larvae eat leaves victims seriously will eat up all of the upper leaves.
Larvae after aging of about 40 mm body length. Head and tail yellow, light green back, there is the size of each black dot, and its on a white long-haired Health.
(B) control methods
(1) the occurrence of larvae sprayed or 1200 กม trichlorphon 1000 กม 520% dichlorvos or 5000 กม 20% speed kill small.
(2) early spring in the vicinity of grape root, combined with soil preparation digging unearthed disinsected pupae (insects kidney: reddish-brown, 20 mm long, the tail of neat).