When planting peach trees, how to prevent from being invaded by longicorn beetles?

The body length 1 1 ~ 17 mm, and the antenna is equal to or slightly longer than the body. The COLEOPTERA end of male adults is sharp and round; The female adult is blunt and round, the tail of abdomen is slightly longer, and there is 1 longitudinal groove in the center of abdomen. The chest back plate is light green with two parallel circular black spots on it. There are light green and black spots on COLEOPTERA, and some COLEOPTERA have three dark spots, which are located at the base, in front of the middle or at 1/3 from the front, and the third dark spot has 1 light green spots in the middle; Some have two black spots on each COLEOPTERA. Eggs. Length 1.9mm, oval, yellow-white, then yellow-brown. Larvae is 25mm long, milky white, and its head is reddish brown. The front of the chest backboard is smooth, with yellow-brown bristles, and the back is embossed with brown particles. There are 1 rectangular transverse concave lines on the back of L ~ 7 segments in the chest and abdomen, and there are brown particles around them. The pupa is 14 ~ 20 mm long, milky yellow and white, with two brown rings at the end.

Using the suspended animation of adults, artificial killing is carried out in the morning or evening of the peak period of adults. When harvesting hemp heads, cut the hemp plants on the ground and destroy some eggs and larvae. When hatching, try to peel the hemp skin or combine hemp pods to kill the newly hatched larvae. When arranging new hemp fields, seed pods should be free of insects. In order to prevent sesame from spreading longicorn beetles, the seeds cut in winter should be soaked in cold water for 24 hours, dried and then planted. Before the adults lay eggs, spray (sprinkle) (2) 5% acetamiprid powder 1 ~ 1.5 kg or 90% crystal trichlorfon l000 times solution every 667m2, starting from the periphery of the hemp field and gradually moving to the middle to prevent the adults from escaping from the field. When necessary, the newly hatched larvae were poisoned with 700 ~ 800 times of 90% crystal trichlorfon solution or 10% tea seed cake extract.

Living habits. After eclosion, the adults stay in the wormhole for 3-5 days to get out of the tree, and the eggs are laid in the skin cracks, mostly on the trunk within 35 cm from the ground. After hatching, it feeds into the cortex, gradually feeds into the space between the phloem and xylem under the skin with the growth of the insect body, feeds into the xylem only after it grows to 30mm, feeds more into the tunnel that bends up and down, and feeds into the 1 ventilation and defecation hole at a certain distance outward; Part of it can decay to the bifurcation of the main root, and the depth is about 35cm. Fecal debris accumulates in the tunnel, and due to the rotation and peristalsis of the insect body, it is squeezed out from the ventilation hole and accumulated on the ground or branches. Harmful symptoms. Larvae eat cortex and xylem, and like to eat between phloem and xylem. The tunnel bends downward, and there are dung scraps in it, which are 50 ~ 60 cm long. 65,438+0 dung holes are drilled outward at regular intervals, causing the tree to weaken or die. Hurt crops. It mainly harms peaches, and occasionally harms apricot, elm, willow and oak.

Overwintering overwinters with larvae of all ages. After the harm germinated, it began to harm. Adults occur from May to August, early in the south, such as late May in Fujian, early June in Hubei, early July to mid-August in Shanxi, Hebei and Shandong. Fourth, the occurrence area. It happened in the areas south of Liaoning and Inner Mongolia. The density of provinces in the Yangtze River and Yellow River basins is quite high.

Cerambycidae. Morphological characteristics. Adult males are 23 ~ 28 mm in length and females are 30 ~ 42 mm in length, with dark brown and shiny bodies. The breast sauce is red or dark red, and there are 1 pairs of small protrusions at the front and rear edges of the back plate of the breast, and there are large protrusions on both sides. Female insects have many transverse folds on their chests and abdomen. Males are densely carved. The antenna is 1 1, and its length is more than 5 nodes. The antenna of a female insect is more than 2 knots long. Light green, partly milky white, 1.2 ~ 2 mm long, with an oval tip at the back end, which looks like sesame. It is 42 ~ 50 mm long, yellow-white, with a horizontal rectangle on the chest and back, four tan patches on the front half, two horizontal rectangles on the back, and a notch in the center of the front edge; The patches on both sides are slightly triangular; The second half is pale with longitudinal wrinkles. Pupa. The pupa is 37mm long and yellow-white, with 1 root thorns on both sides of the chest.