Observation on Occuring Law of Adult Feed of Monochamus alternatus on Pinus thunbergii of Daishan

To clear the law of adult feed of Monochamus alternatus, we have observe Pinus thunbergii forest in Daishan County, it indicates: the adult of Monochamus alternatus like eating the underpart of one-year twigs, but to the twigs in different directions,they prefer one-year twigs to the west. This is the law of adult feed of Monochamus alternatus.