PoplarsAs a fast-growing and high-quality tree species, it has the characteristics of short rotation period and strong adaptability, and has been widely cultivated in China and around the world. However,PoplarsThere are also many facesPests and diseasesof the threat of which SanCelestial BullYesPoplarsThe main cavitiesPestsOne, rightPoplarsis becoming more and more harmful. MulberryCelestial BullNot only widely distributed, butlifeHistory is extremely untidy, givePoplarsSerious injuries were caused. This article will describe in detail the characteristics, hazards and control methods of mulberry beetle to increase the awareness of thisPestsunderstanding and coping skills.
MulberryCelestial Bull, also known as grain shoulderCelestial Bull, brownCelestial Bull, belonging to the order ColeopteraCelestial BullSection. It is widely distributed and can be found in 24 provinces, municipalities and autonomous regions in China. Whether it is a woodland or a plateau, mulberry may appearCelestial Bullexists. It has a wide range of diets, not only toPopulus tomentosaMulberry treesConstruct a tree, white elm and willow for food, but also harmfulFigs, apples, cherries, pears, citrus and many other forest treesFruit trees, but rightPoplarsis the most serious.
Female mulberryCelestial BullThe body length of the adult is about 46 mm, and the body length of the adult male is about 36 mm. The body wings of the adult are grayish-brown, densely covered with short yellowish-brown hairs, and the back is slightly flattened. They have very long antennae. The larvae, on the other hand, are cylindrical, fat, and pale yellow in color. MulberryCelestial BullThe eggs are oblong, milky white in color, and are about 5 7 mm in size.
MulberryCelestial BulloflifeHistory is very irregular, usually 2 to 3 years of breeding generation. The larvae overwinter in the branches, and the larval stage is up to 2 years. In May of the following year, they pupate in the cavities, and then emerge into adults in large numbers from late June to mid-July. Adults are generally nocturnal and have a strong ability to fly. They are phototaxis and will disguise themselves as dead, and will wake up and fall to the ground once a stick hits the branch, making them very easy to catch.
MulberryCelestial BullBoth larvae and adults feed on the host plant. Adults feed on the bark of branches and lay eggs when they feed. They prefer to lay eggs on branches or trunks with a diameter of 1 3 cm, and will bite through the cortex with their palate before laying eggsXylemto form a U-shaped notch. They will lay their eggs in the grooves, which will be reached directlyXylemEach female can lay more than 10 eggs.
And the larvae feed firstPhloemand then eats the treesXylem, all the timelifeInXylemInner until feathering. Inside the cavity, the larvae bite out round fecal holes at intervals and expel droppings and wood chips from the holes. Thanks to the mulberryCelestial BullThe growth and development of many trees has been greatly affected, and the growth trend of trees is obviously poor, resulting in a decline in the utilization value of woodFruit treesThe yield is reduced, and the damage is severe, and even the whole plant will die.
Chemical control: For adults, 48% can be usedChlorpyrifosEmulsifiable concentrate 5000 to 6000 times liquid or 25%.CypermethrinEmulsifiable concentrate 2000 4000 times liquid spraying. Due to the larvae for a long timelifeInside the trunk, pesticide spraying does not have direct access to the larvae. Pesticides such as imidacloprid can be used orAluminium phosphidePut it into the fecal discharge hole, and close the orifice with wet mud to kill the inner mulberry of the branchesCelestial BullThe purpose of the larvae.
Biological control: Adopt natural enemiesInsectsand pathogenic bacteria carried out mulberryCelestial Bullprevention and control. You can use the natural enemy of the velvet parasitic armorInsects, its larvae parasitize the mulberry by ectoparasitismCelestial Bulllarvae and pupae on the body. In addition, the long-tailed rodent wasp on the mulberryCelestial BullThe eggs have a highly efficient parasitic rate. In addition, Beauveria bassiana is broad-spectrumInsectsPathogenic fungus, it can infect mulberryCelestial BullThe various tissues and organs in the larvae's body, causing the larvae to weaken and eventually die.
Physical control: due to mulberryCelestial BullIt is oriented to light and can be installed in orchardsFrequency-vibration solar insecticidal lampto trap adult insects. Forestry measures: in mulberryCelestial BullIn high-incidence areas, you can choose to plant mulberryCelestial Bullnon-host tree species, such as Pinus huashanensis, Eucommia ulmoides, Ash and other tree species, in order to effectively reduce the harm degree of Mulberry beetle.
MulberryCelestial BullAsPoplarsmainPestsOne, rightPoplarsis becoming more and more harmful. Learn about the characteristics of the mulberry beetle andlifehabits, as well as taking corresponding prevention and control measures for protectionPoplarsHealthy growth is of great significance. In the prevention and control of mulberryCelestial BullIn the process, chemical control can be usedBiological control, physical control and other means are combined to achieve the best prevention and control effect.