What is the American white moth?

What is American White Moth? What are the hazards of American white moths? What are the methods of controlling American white moths? Please also understand the netizens to help introduce American white moth, also known as American lantern moth and autumn curtain caterpillar, causes serious damage to garden trees, economic forests and farmland shelterbelts; it is one of the first invasive alien species in China, distributed in Yunnan, Guangxi, Guangdong, Jiangxi, Zhejiang, Hunan, Guizhou, Hubei and Sichuan, etc., and is a worldwide quarantine pest. Therefore, the planting network collated the harm and prevention methods of American white moth, listed in detail below for netizens to refer to. Harm of American White Moth: American white moth larvae often cluster on the leaves to spin silk net nest, in which the leaves of food damage, American white moth larvae net nest sometimes up to 1 meter or more, loose irregular, will be twigs and leaves wrapped in the net, shaped like a canopy, because often appear in midsummer to early autumn, so called autumn curtain caterpillar. The first to second instar larvae of Hyphantria cunea only feed on mesophyll. In severe cases, the leaves of the whole plant are eaten up, leaving only veins, and the whole leaves are transparent gauze. The third instar larvae begin to bite the leaves into notches. The fourth instar larvae begin to divide into several small groups and form several nets. The food intake of the fourth instar larvae increases greatly. After the fifth instar, they enter the gluttony period of single feeding. American white moth takes a large amount of food during the whole larval period, resulting in weak plant growth, low stress resistance, reduced fruit quality, part of the branches and even the whole plant death. A severely damaged fruit tree has a severe reduction in fruit production, sometimes resulting in no fruit in the current year or even the following year. Victims of trees, due to tree weakness, vulnerable to silverfish, fungi and bacteria attack, greatly weakened its cold resistance, disease resistance. American white moth growing environment: A large number of overwintering adults of Hyphantria cunea emerged when the ambient temperature was above 18~19℃ and the relative humidity was about 70%. After adult emergence, female and male mate 0.5~1 hour before sunrise in the next morning. The mating time can last for 5~40 hours (average 14~16 hours), and only mate once in life. Soon after mating, female will lay eggs. Adult flight ability and phototaxis are not strong. Female insects lay eggs and have obvious selectivity to host. They like to lay single layer eggs on the back of leaves of maple, mulberry and fruit trees. There are 500~700 eggs per egg block, and more than 2000 eggs at most. The eggs laid by adults are firmly adhered and not easy to fall off; the eggs are covered with hair, and rain and natural enemies are difficult to invade. The optimum temperature for egg development of Hyphantria cunea is 23~25℃ and the relative humidity is 75~80%. As long as the temperature and humidity are suitable, the hatching rate can reach more than 96%. Even if the leaves of eggs are dry, there is no effect. American white moth control methods: Method 1. Using trap lamp to trap adults in adult eclosion stage. Lure lamp should be set in the previous year, the occurrence of American white moth more serious, surrounded by open plots, can obtain better control effect. Spraying poison lamp to lure adults within 50~100m from the lamp center. Method 2. Tetrastichus zhoui is the natural enemy of Hyphantria cunea, and it can control Hyphantria cunea by parasitizing it. By releasing Tetrastichus choui, not only has good control effect and long time, but also has no pollution and pollution to the environment, so that a population of Tetrastichus choui is formed in nature, and the biological control goal of harmful organisms such as American white moth and the like is gradually realized. (Pesticides may not be effective because the larvae are wrapped in nets around the leaves they are born with.) Method 3. In the larvae damage stage, 45% phoxim 1000 times solution, or 20% fenvalerate 1500 times solution + lectin 2000 times solution, 40% pyrimethion. Spray 1500-2000 times of poison solution to kill larvae for 1-2 times continuously, with an interval of 7-10 days. The drug can be rotated to delay the onset of resistance. Method 4. The harm of Hyphantria cunea was effectively controlled by spraying 80% dichlorvos EC 1000 times, 2.5% deltamethrin EC 2500 times and 4.5% beta-cypermethrin EC 2300 times. What is Bacillus thuringiensis?