What we did about the American white moth

There are many kinds of natural enemies of the American white moth in nature, among which there are two kinds of white moth with better parasitic rate and lower breeding cost, one is the white moth Zhou's rodent wasp, and the other is the white moth black base rodent wasp.

The American white moth (scientific name: Hyphantria cunea) is a white moth of the family Lamp Moth, a white moth with a female body length of 9-15 mm and a wingspan of 30-42 mm; Male moths are 9-13 mm long and have a wingspan of 25-36 mm. Oval spherical, about millimeters in diameter.

The first hatchling larvae are generally yellow or light brown in color. The male pupa is thin and small, with a longitudinal ridge on the back, and the female pupa is more hypertrophied. There are 10-15 irregularly arranged gluteal spines at the end of the abdomen, and the ends of the gluteal spines are swollen and flare-shaped.

The adult American white moth has three characteristics: "phototaxis", "taste" and "food", and is more sensitive to odor, especially fishy, fragrant and odorous. Generally, in the surrounding trees such as toilets, livestock houses, and stinky puddles with poor sanitary conditions, epidemics are very likely to occur. The American white moth is native to North America, mainly in the United States and southern Canada, and its ecological distribution range is between 19°-55N°.

Answer] Lu Xunbo: Changmo (1) Strengthen plant quarantine. (2 points) 2) When the epidemic is discovered, according to the actual situation, manually remove the egg mass, net curtains, pupae and cocoons that have not been dispersed after hatching.

If the larvae have been dismantled, dichlorvos or pencartin EC can be sprayed. (3 points).

3) Fumigation of insect-bearing logs. Fumigation with aluminum phosphide tablets or with methyl bromide. (3 points).

4) In epidemic areas or epidemic areas, the scope of occurrence should be ascertained as soon as possible, and blockade and eradication should be carried out. (2 points.)

The American white moth is also known as the American white light moth, the autumn curtain moth, etc. Originated in North America, in 1979 China first discovered the American white moth in Dandong, Liaoning Province, and then quickly spread the harm. The American white moth can harm more than 200 kinds of forest trees, fruit trees, crops and wild plants, and in severe cases, the trees are eaten into bare poles, and the growth is weakened, and continuous damage can lead to the death of the damaged trees, and the loss of forestry production is heavy.

Prevention and control methods. 1) Physical control When the average daily temperature is above 15, the black light traps the adults, and the trap lamp with the trapping electric shock function can also be used to trap a large number of insects. At the larval stage, the net curtain is manually cut; Before the mature larvae go down to the tree for wintering, wrap the straw (rope) around the trunk of the tree, and remove it and burn it before it pupates under the grass until it is feathered.

2) chemical control in larvae 1 2 instar, use BT biological insecticide 1000 1200 times; When larvae 3 and 4 instars, use 800 1000 times of solution; After the 5th instar, the larvae were sprayed with 500 800 times of liquid. In the larval stage, it can also be controlled by using 1700 2500 times of chlorpyramide or 4000 6000 times of 5% Ka Ke emulsifiable concentrate. For urban and residential areas, 10% annihilation emulsifiable concentrate 6000 8000 times liquid, deltamethrin vinegar emulsion 5000 6000 times liquid or smoke?

1000 2000 times of ginseng alkali emulsifiable concentrate for prevention and control.

Prevention and control methods.

1. Strengthen quarantine.

Seedlings in epidemic areas are strictly prohibited from being transported without quarantine or treatment, and active prevention and control are carried out in epidemic areas to effectively control the spread of the epidemic.

2. Artificial prevention and control. Before the larvae were found before the 3rd instar, the net curtain was manually cut and treated intensively. If the larvae have been dispersed, the larvae that are pupated by the trunk of the tree should be lured by tying grass before the larvae pupate, and the larvae should be treated in a centralized manner on a regular basis.

3. Use American white moth sexual attractant or environmentally friendly insect tropism trap to trap and kill adult insects. In the adult stage, put the trap core into the trap, hang the trap in the forest, directly trap and kill the male adult, block the pest mating, reduce the reproduction rate, and achieve the purpose of eliminating the pest.

4. Use biological and chemical agents to spray for prevention and control. Early detection and early prevention and control should be achieved during the larval damage period. In the prevention and control, focus on checking whether there is larval damage to mulberry, plane tree, stinky tree, elm, gold and silver wood, peach tree, white wax and other tree species, if there is larval harm, it is necessary to inspect the area under its jurisdiction and prevent and control it in time.

The agent is 400 times of BT emulsion and 2500 times of 2 5 deltamethrin emulsifiable concentrate. 80 dichlorvos emulsifiable concentrate 1000 times liquid, 5 lyphalin 4000 times liquid spraying control, can effectively control the damage of this insect.

5、.Biocontrol. Zhou's rodent wasp is a newly discovered species, native to China, but it has become the natural enemy of the American white moth.

Since the middle of the last century, the harm of American white moth in China has been increasing, and the effect of traditional control methods has become worse and worse. In 1998, China launched the American white moth control project, and biological control became a breakthrough.

Presided over by Yang Zhongqi, a researcher at the Chinese Academy of Forestry, since the 90s of the last century, from the perspective of biological control, the parasitic natural enemies of the American white moth have been systematically investigated, and a variety of natural enemies have been raised from its eggs, larvae and pupa. After screening, a kind of pupal parasitic wasp with high parasitic rate, large number of bees, and can effectively control the American white moth, the white moth Zhou's rodent wasp. This small wasp can find American white moths that pupate in various hidden places and lay eggs for parasitism.

The research results protect the ecological environment and do not kill natural enemies, which is an advanced technology for the prevention and control of the American white moth.

The Zhou's rodent wasp can bite through the American white moth pupae in an instant and parasitize the eggs.

The American white moth is a very harmful insect, it specializes in feeding on plant leaves, and its feeding habits are very mixed, including crops, fruit trees, forest trees, flowers, vegetables, etc., and can harm more than 300 kinds of plants. The American white moth was first discovered in Dandong, Liaoning Province in 1979, and then found in Shandong, Shaanxi, Hebei, Shanghai and other places. For 20 years, the American white moth has caused serious damage to these areas, and almost all the leaves of the trees have been eaten up when they become a disaster.

Although China's plant protection scientists have adopted a variety of control measures, the area of forest areas infested by American white moth is still expanding day by day. In order to fundamentally control the American white moth, the scientific researchers of the Tianjin Institute of Landscaping and Landscaping have bred and screened out a kind of high-quality parasitic wasp that is only millimeters long, has strong parasitic ability, large reproduction, likes to swarm and parasitize the American white moth pupae and absorbs all the nutrients in the parasitic pupa, and explored a new method for effectively controlling the harm of the American white moth.

Pyrethyl 4000 times spraying, once every 10 days, can be worry-free!

I'm now engaged in garden plant protection, so just ask me if you have any questions.