What is a mulberry longshank? The characteristic

2 ~ 3 years to complete a generation. The larvae overwinter in the trunk and branches. Larvae grew for 620 to 650 days and overwintered twice. In spring, when the tree bud germinates, it begins to move and eats caries along the branches in the xylem. The wormhole is separated at a distance from the wormhole to discharge the wormhole. There is no wormhole or sawdust in the tunnel. The third year between June and July old ripe, with sawdust to fill both ends of the tunnel, pupation room. Adults emerge in mid-July, feed early and late, do not like flying, can be killed by shock. Females prefer to lay eggs on twigs 2 to 4 years old. The bark is bitten into a "U" shaped wound, where eggs are deposited, and the wound is sealed with mucus. The egg stage is about 14 days. After the first hatchlings eat into the xylem, they eat about 10 cm up, and then turn downward until they reach the root neck, where they overwinter in a section of the wormway.

Prevention and control methods (1) poison swab fumigation. According to the size of the wormhole, choose appropriate thick zinc phosphide poison stick, insert 1 in each hole, penetrate the wormhole 4-5 cm deep, then stick mud seal, smoke to kill larvae.

(2) Poison by injection. Use tree trunk injection machine punch injection, or backpack sprayer, nozzle welding 20 animal needle, inserted into the wormhole injection. Can be injected 50% phoxim 1000 ~ 1500 times until the outflow of the liquid, and then with clay seal hole. 5 ~ 7 days after the occurrence of new insect feces should be treated.

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