Control techniques of bark moth in Litchi

Litchi pseudo-wood moth damage litchi, longan, but also damage citrus, acacia, Casuarina and other fruit trees and trees. It damages branches into tunnels, but mainly damages the cortex of branches and seriously affects their growth. Young trees are injured and can die.

Life habits: one generation occurs every year, overwintering as larvae, pupation from mid-March to late April, eclosion from April to May, spawning from late April to early June, larvae appear from May to June. Moths rarely phototactic, eggs more than 10 cm in diameter on the branches. Larvae in the branches of the bifurcation or where there is a wound into the tree body to form a tunnel to live, at the same time in the tunnel mouth along the direction of eating harmful bark, spinning silk will be insect dung, branch dander to form a silk tunnel. The tunnel is a place where larvae live and pupate. Larvae do harm at night, moving under the silk tunnels of branches and gnawing bark outside the tunnels. Silk tunnels can be up to 0.6 meters long. The depth of the tunnel is about 5 cm.

Control methods: 1. Use a syringe to absorb dichlorvos emulsion 1:1 (water) or other organophosphorus solutions in the same ratio, inject about 0.5 ml into the tunnel, and kill larvae. 2. Spraying carbaryl or pyrethroid dilutions on branches near tunnels in June and July can kill early larvae. 3. Use bamboo sticks and wood sticks to block the tunnel, so that larvae or pupae suffocate and die. It can also be pierced with steel wire.