Xingtianni is also known as the silver star beetle, and the larvae are commonly called "harbin". There are distributions in both the north and the south of China. Adults from May to July eat the cortex of the branches, and the larvae are pests of the pupa. The damage occurs throughout the year, usually occurring in 1 generation in 1 year. The newly hatched larvae feed on the outer rind of the shoots and grow into the branches and feed on the xylem. The wormholes and shoots stop growing and the leaves darken or turn yellow. In severe cases, the branches break and die. Adult black, with white spots, shiny, insect body length 19-21 mm, antennae longer than body length, knotted. The larvae are pale yellow or white and are 38-x-60 mm long.
Control methods:
(1) Artificial killing of adults from May to July.
(2) There are traces of spawning on the base of the stem, and when a brownish liquid appears, use a hard object to squeeze or open the cortex with a knife, bamboo, etc. to kill the newly hatched larvae.
(3) Use a medical injector to inject 50% of safrole EC 800-1000, or 50% of SC 800-1000, or 80% of dichlorvo EC 1000-1200. Or 50% phoxim EC 1000-1200 times solution, after filling, seal the hole with wet mud, the effect is good.
Control methods:
(1) Artificial killing of adults from May to July.
(2) There are traces of spawning on the base of the stem, and when a brownish liquid appears, use a hard object to squeeze or open the cortex with a knife, bamboo, etc. to kill the newly hatched larvae.
(3) Use a medical injector to inject 50% of safrole EC 800-1000, or 50% of SC 800-1000, or 80% of dichlorvo EC 1000-1200. Or 50% phoxim EC 1000-1200 times solution, after filling, seal the hole with wet mud, the effect is good.
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