The body length is 11~17mm, and the antennae are as long as the body or slightly longer. The elytra of the male adult are sharply rounded at the end; the female adult is blunt and rounded, the telson of the abdomen is slightly longer, and there is a longitudinal groove in the center of the ventral surface. The pronotum is light green with 2 parallel black spots on it. There are light green and black spots on the elytra. Some elytra have 3 black spots, located at the base, in front of the middle, or 1/3 from the front end. There is a small light green spot in the middle of the third black spot; some have 3 black spots on each elytra. There are 2 black spots on it. egg. 1.9mm long, oblong, yellowish white, later turning yellowish brown. larva. The body is 25mm long, milky white, with a reddish-brown head. The front half of the pronotum is smooth with yellowish-brown bristles, and the back half has convex patterns composed of brown dots. The backs of the metathorax and abdomen segments 1 to 7 each have an oblong shape. There is one horizontal concave pattern with brown spots around it. The pupa is 14-20mm long, milky white, with 2 brown rings at the tail end.

Using the suspended animation of adults, artificial hunting is carried out in the morning or evening when adults are in full bloom. When harvesting hemp heads, cut the hemp plants at ground level to eliminate some eggs and larvae. Try to peel off the hemp bark during the hatching period of the larvae or combine the hemp pods with poison to kill the newly hatched larvae. When arranging a new hemp field, the seed pods need to be insect-free. To prevent sesame seeds from spreading to beetles, seeds cut in winter should be soaked in cold water for 24 hours, dried before planting. Before adults lay eggs, spray (sprinkle) (2) 1 to 1.5 kilograms of 5% trichlorfon powder or 1000 times of 90% crystalline trichlorfon every 667m2, starting from around the hemp field and gradually moving toward the middle to prevent The adults escape from the field. If necessary, pour 700 to 800 times of 90% crystalline trichlorfon solution or 10% tea seed cake infusion to poison the newly hatched larvae.

Life habits. After emergence, the adults stay in the tunnel for 3 to 5 days before emerging from the tree. Eggs are laid in the cracks of the bark. Most of the eggs are on the trunk within 35cm from the ground. After hatching, it burrows into the cortex. As the insect grows, it gradually burrows into the subcutaneous phloem and xylem to cause damage. It burrows into the xylem after it grows to 30mm. It usually eats from top to bottom to form a curved tunnel, and burrows outward at a certain distance. 1 Ventilation and defecation holes; some can reach the bifurcation of the main root, reaching a depth of about 35cm, and feces accumulate in the tunnel. Due to the rotation and peristalsis of the insect body, the feces are squeezed out of the ventilation and defecation holes, and accumulate on the ground or branches. superior. Symptoms of harm. The larvae feed on the cortex and xylem, preferring to feed between the phloem and xylem. They bore tunnels that curve downwards with feces inside, up to 50-60cm long. They bore excrement holes outward at a certain distance, causing the tree to weaken or die. . Harm crops. It mainly damages peaches, and occasionally apricots, elms, willows, oaks, etc.

Overwintering. Overwinter as larvae of various instars. The harm begins after the beginning of harm. Adults occur from May to August, early in the south, such as in late May in Fujian, early to mid-June in Hubei, and from early to mid-July to mid-August in Shanxi, Hebei, and Shandong. 4. Occurrence area. It has occurred in Liaoning and areas south of Inner Mongolia. The density in all provinces in the Yangtze and Yellow River basins is quite high.

Cerambycidae. Morphological characteristics. The body length of adult males is 23~28mm and the length of females is 30~42mm. The body is dark brown and shiny. The forechest is red or dark red. There is a pair of small protrusions on the front and rear edges of the pronotum, and there are large protrusions on both sides. There are many horizontal creases on the ventral surface of the prothorax of the female. Male insects are densely covered with engraved spots. The antennae have 11 sections, 5 sections longer than the body length. The female's antennae are 2 sections longer than the body length. Light green, sometimes milky white, 1.2 to 2mm long, with a long oval shape at the rear end, resembling a sesame seed. The body is 42 to 50 mm long, yellowish white, with a transverse rectangular shape on the pronotum, 4 transverse yellow-brown patches on the front half, and 2 transverse rectangles on the back, with a notch in the center of the front edge; the patches on both sides are slightly triangular; the back half The skin is light in color and has vertical wrinkles. pupa. From the pupa, the body length is 37mm. It is light yellowish white and has one spine on each side of the chest.