The species and integrated control of main pests of bayberry
Yangmei not only has high medicinal and edible value, but also is an excellent evergreen foliage and fruit tree species. According to statistics, the total cultivated area of ​​Chinese bayberry has exceeded 213,000 hectares. However, due to poor management and other reasons, Yangmei suffered from various pests and caused serious economic losses. 1 cypress oyster. If Ruojiao and female adults become fixed on the both sides of the main vein on the front and back sides of the leaves and on the 1-year-old or 2-year-old shoots, the leaves will lose their luster and gradually become brown and dead. The branches that have been sucked will gradually dry out. Death, shaped like a "fire-like", leads to debilitating tree vigor, fruit yield and quality decline, and when the damage is severe, the whole tree will die. Zhejiang, Nanjing and other places occurred in 2 generations in 1 year, and the damage period was from June to September. 2 network shields. The female veins, young shoots, and petiole bases are damaged by female adults and rumorous lice, sucking their sap and causing coal contamination. When the damage is light, yellow spots appear in the leaves and other tissues, affecting their photosynthesis and yield; when the damage is severe, they often cause the leaves to wither and even die. In the Zhejiang region, there were 2 generations in one year, and the period of damage was from mid-May to mid-July, mid-September to late October. 2. Chewing. 2 tung trees. L and 2 instar larvae prefer to eat epidermal and mesophyll from the margin or tip of the leaf. When the 3rd instar larvae are damaged, they become nicked. After 4th instar, they can eat the whole leaf. Algebras vary throughout the country. 3 small yellow leaf roller moth. The larvae spit on the young leaves, conjugating the adult worms and eating them. After the new shoots of Yangmei are affected, the normal growth and development and leaf photosynthesis are affected. When the damage is severe, the shoots appear reddish brown and dry. Algebra differs in different regions. 2. Biological control. Biological control relies mainly on the protection of natural natural enemies. The main natural enemies of the sucking pests are the red dragonfly, golden dragonfly, purple beak, yellow beak, double-banded great-horned bee, single-horned giant bee, red-lip beetle, and Japanese small scoop. Insects and so on. The main natural enemies of chewing insects include cockroaches, insects, pine caterpillars, mulberries, thigh bees, black egg bees, and parasitic flies. The main natural enemies of dry pests are parasitoids, ants and birds. In addition to using natural enemies, it can also be controlled by fungi, bacteria and viruses. 1 sucking type. The first generation of Rugao incubator can be used to select 50% of saccharic pine oil 1500 times, or 25% of quizphos EC 500 to 1000 times, or 20% of buprofezin 1500 to 2000 times, or 28%. Bao EC 1200 times liquid spray control. 2 chewable. The tea pod moth: The initial larvae damage is controlled with a 50% malathion EC from 1000 to 1500 times, or a 0.3% hyperosmotic avermectin EC from 1500 to 2000 times, or a Bacillus thuringiensis WP 500 times. The length of the larvae is controlled by 10% Permethrin, or 35% endosulfan 2000 to 3000 times, or 10% bifenthrin EC 5000 times. Yellow leaf roller moth: The larvae damage is controlled with 50% killer pine oil 1000 times in the initial stage. 3 dry type. Small particles: Use 48% chlorpyrifos cream 1,000 times, or 48% chlorpyrifos cream + waterproof coating 5 to 10 times to brush the affected parts. Starlings: use cotton pupae, dichlorvos and other drugs stuffed into the borehole and blocked with mud. The control effect is very good. According to the habit of feeding young leaves to supplement nutrients during adult damage period, 25% carbaryl is sprayed during the peak of adult emergence. Wettable powders 1.5 to 3.75 kg/ha have good control effects. L-size Carrot,L-size Fresh Carrot,L-size Premium Carrot,L-size Organic Carrots Yirun Agricultural Cooperative , https://www.yiruncn.com
First, the main pest species
1. Thorn suction.
3 oysters. The sap of stems and stems of Rugao and Chengyu clusters over 2 years of age can cause the plants to grow poorly so that they can't grow buds. The damaged branches often shrink and break easily, and the severe victims suffer from pruning and death. One or two generations occurred in one year, and the period of damage was from early June to early July.
1 tea cocoon moth. Because of its distribution of damage, there is a clear center of damage. The larvae bite on the leaves, shoots or branches of the larvae, and the fruit's skin in the pocket, resulting in partial baldness. The occurrence of algebra varies across the country, with 2 generations occurring in 1 year, and the period of the damage is from July to August.
3. Dry type.
1 small grain small rake. After the damage of the trunk can be observed in the hole and the yellow-white excrement, and the victim part of the water smell. After Yangmei was killed, the shoots were sparsely populated and the tree vigor was significantly reduced. In severe cases, a large number of fallen leaves appeared, the yield decreased, and even the tree declined. 1 to 2 generations occurred in 1 year.
2 stars Tianniu. The larvae can damage the xylem and roots of the base of the trunk, and the adults feed on the leaves, causing the leaves to be nicked. Algebras vary throughout the country.
Second, comprehensive prevention
1. Agriculture and physical control. Combine pruning and other agricultural operations to remove larvae, cockroaches, pouches, and insect-affected stems; apply more phosphorus and potassium to enhance the tree's resistance to insect pests; most adults have phototaxis and can hang black lights at night. The sedation and killing; Starlings adults like to climb to the bottom of the trunk to lay eggs and have a feign death, can use these characteristics to manually kill adult and eggs; according to the freshness of the excrement of dried pests outside the exhaust hole, the use of wire to kill and other methods .
3. Chemical control. When pests are severe and manual removal does not solve the problem, chemical control can be used. The principle of prevention and control is to select high-efficiency and low-toxicity chemical agents, pay attention to the use of multiple agents, and cannot use single agents for a long time.