Scientific name Psacothea hilaris (Pascoe) Coleoptera, Cerambycidae. Distribution Hebei, Jiangsu, Zhejiang, Anhui, Jiangxi, Sichuan, Yunnan, Taiwan and other provinces. Host mulberry, fig, tung tree, wholesaler, citrus, willow and so on. It is a major pest of mulberry trees. Injurious characteristics of adult damage mulberry cortex, leaves, resulting in dead branches; larvae eat the branches of the cortex, and then from the top down to the xylem to form a convoluted spiral esophagus, the tunnel filled with excrement, resulting in cortical desiccation and mulberry withered, Mulberry plants are dead when they are smashed. Morphological characteristics Adult body length 15-23mm, body dark brown, dense yellow-white or gray-green short hair, body yellow dot pattern. There is a yellow longitudinal band on the head and the antennae are longer. The male is 2.5 times longer and the female is 2 times longer. A small spike was formed on the center of both sides of the anterior chest, and each of the left and right sides had a vertical yellow line connected to the yellow spot after the compound eye. A dozen of yellow spots were present on the elytra. There are also vertical yellow lines on both sides of the chest and abdomen. Eggs 4mm long, cylindrical, light yellow, slightly sharpened at one end. The last instar larvae have a body length of 22-32mm, a cylindrical shape, a brownish-brown head, and yellow-white chest and abdomen. The back of the first thoracic node has a brown rectangular hard-skinned plate with a pattern of "convex" characters and brown triangles on both sides.蛹 16-22mm long, spindle-shaped, milky white, compound eye brown. Living habits Jiangsu, Zhejiang, l generation, Guangdong 2 generations, both wintering larvae. Hunchun began its activities in mid-March, evacuated in early June and emerged in early July. The adult's lifespan is more than 80 days. The feathers then eat the shoots and shoots at the tip, spawn after 15 days, enter the spawning period in late July, and lay eggs on 28-45mm diameter branch or stem. Spawning Traces of about 3mm, were in a shape, each of the eggs in the production of 1-2 capsules, 182 per female. The egg period is 10-15 days and the hatching period begins in early August. The newly hatched larvae first feed under the skin and pile up the excrements in the borehole. When they grow up, they enter the xylem and form a tunnel. In the first half of November, they tunnel or subcutaneously punch the hole. . For prevention methods, see Sang Tianniu.
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