Fall armyworm is very harmful, what are the effective countermeasures?

Spodoptera exigua will have translucent membrane "intestinal holes" and irregular pores on the corn leaves, or they will eat up the whole corn leaves, and in severe cases, the corn growing point may die. This kind of pest eats a large amount, especially at an advanced age, so even if it eats a plot, it will migrate to the surrounding crop fields in groups, continue to suffer, and the loss is particularly serious. The reason why the spodoptera exigua, which is very harmful:

High fecundityThe meadow noctuidae is very fecund, and under normal circumstances, a female moth can lay up to nearly 2,000 eggs. In addition, the grassland is also very strong in the growth of noctuidae and can survive normally in various environments. And it can also be parasitic, and the parasitic range is also wide.

It can be parasitic not only on corn, but also on food crops such as rice and millet. Weeds can also grow, and when it is most important, they have the ability to fly, and they spread very quickly, and the affected area expands.

There are antibodies to various pesticides, and the control effect of various pyrethroid pesticides is not obvious. Moreover, because the grassland poison moth is an alien species in our country, our country has no natural enemies, so it grows quickly. And the meadow gluttony armyworm is a pest of the Americas, so it is very common on corn.

Therefore, local residents often use pesticides, which naturally produce large amounts of antibodies to noctuidae in the meadows. Therefore, after invading our country, many pesticides naturally lose their effectiveness by carrying antibodies themselves. Spodoptera exigua's prevention** method on the grass.

The grassland moth is an invasive species, so at present, China cannot place effective pesticides. However, in the natural grassland, after the outbreak of the disease of the noctuidae, all parts of our country have entered the emergency prevention work. Agricultural parks are also screening common pesticides in China, first of all, from these pesticides to select pesticides with good prevention effect and low toxicity.

To a certain extent, it can prevent grassland poison moths, inhibit reproduction, and reduce the number. Avoid causing more damage. Strong fecundity.

Tolerance of the large grassland moth has antibodies to various pesticides, and the control effect of various pyrethroid pesticides is not obvious. Moreover, because the grassland poison moth is an alien species in our country, our country has no natural enemies, so it grows quickly. And the meadow gluttony armyworm is a pest of the Americas, so it is very common on corn.

Therefore, local residents often use pesticides, which naturally produce large amounts of antibodies to noctuidae in the meadows. Therefore, after invading our country, many pesticides naturally lose their effectiveness by carrying antibodies themselves. Spodoptera exigua's prevention** method on the grass.

The grassland moth is an invasive species, so at present, China cannot place effective pesticides. However, in the natural grassland, after the outbreak of the disease of the noctuidae, all parts of our country have entered the emergency prevention work. Agricultural parks are also screening common pesticides in China, first of all, from these pesticides to select pesticides with good prevention effect and low toxicity.

To a certain extent, it can prevent grassland poison moths, inhibit reproduction, and reduce the number. Avoid causing more damage.

Fall armyworm can be controlled according to the lepidopteran pest control program, such as chlorantraniliprole, cyantraniliprole, and fiproramide, and it is recommended to mix it with flufluthrin, methrin and other agents.

If the corn plant is harmed, the corn leaves will appear translucent film holes and irregular long holes, and the fall armyworm eats a large amount, and after eating up the crops in one area, it will migrate to other crop areas in groups to continue to harm, seriously endangering the growth of crops. For the adults of fall armyworm, they can be used to trap and kill them with insecticidal lamps in the affected areas during the adult occurrence period, or combine sex attractants and food attractants to enhance the control effect.

Because fall armyworm is an invasive species, there is no effective pesticide to control it in China. However, after the outbreak of fall armyworm in nature, all parts of our country have entered the emergency prevention and control work. The Academy of Agricultural Sciences is also screening common pesticides in China, first picking out pesticides with good control effect and low toxicity from these pesticides.

It can control fall armyworm to a certain extent, inhibit reproduction and reduce the number. Avoid causing greater harm.

<>1. Pharmaceutical control: when the eggs have just hatched into ants, 10% cypermethrin emulsifiable concentrate 1200-1600 times solution can be used for uniform foliar spraying, and 10% imidacloprid wettable powder 4000 times solution foliar spray should be used. 2. Adult insect control

Trap with insecticidal lamps in the infested area of adult worms.

1. Control methods of fall armyworm in corn meadow

1. Pharmaceutical prevention and control.

1) At the stage when fall armyworm eggs have just hatched into ant insects, 10% cypermethrin EC 1200-1600 times solution can be used to spray evenly on the foliar surface.

2) You can also use a 1200-1600 times solution of 5% cypermethrin EC to spray evenly on the stems and leaves of the plant.

3) Foliar spray can be used with 10% imidacloprid wettable powder 4000 times solution, or 90% crystalline trichlorfon 1000-2000 times solution can be evenly sprayed on the foliar surface.

4) It should be noted that pollution-free pesticides with low toxicity and high efficiency, low residue amount and short residue time should be preferred.

2. Adult insect control

In the occurrence period of fall armyworm adults, insecticidal lamps are used to trap and kill in the affected area, and the control effect can be improved by combining attractants such as food attractants.

2. Harmful symptoms of fall armyworm in corn meadow

1. After the corn leaves are harmed by fall armyworm, there will be translucent film holes and long holes, which are irregularly shaped, which can eat the whole corn leaves, and will cause corn death when the damage is serious.

2. The larvae of fall armyworm will parasitize on crop plants and feed on the leaves and stems of crops, especially the harm to corn is very serious, usually 1 fall armyworm larvae can destroy 1 corn seedling.

3. Fall armyworm is a pest that feeds on crops, mainly harming corn, rice, wheat, barley, sorghum, sugarcane and other crops, and will also harm apples, grapes, oranges, papayas, peaches, strawberries and other fruits, and its food is very large, especially in its advanced age has a certain explosiveness, after eating up a crop area, it will migrate to other crop areas in groups to continue to be harmful, seriously affecting the growth of crops.

Fall armyworm is a moth of the genus Spodoptera exigua, native to tropical regions of the Americas and has a strong migratory ability. The life span of the adult is about 12 days, and the complete cycle is only 30 days, and its larvae can eat a large number of crops such as grasses such as rice, sugarcane and corn, as well as Asteraceae and cruciferae, causing serious economic losses.

For the invasion of fall armyworm, many corn-stricken areas in southern China have given corresponding countermeasures, and the following prevention and control measures can be taken.

First, monitoring and early warning.

Key monitoring points were set up in the planting areas of high-risk crops such as corn, rice and potato, and the number and dynamics of adult Spodoptera frugiperda were monitored by using black lights, tuopu high-altitude detection lights, and sex pheromone trapping. In the occurrence area, the method of combining field census and systematic investigation can be used to accurately grasp the number of eggs, larvae and pupae of fall armyworm, the degree of damage and their dynamics, and release early warning information in a timely manner, so as to achieve early detection, early reporting and early warning.

The second is adult trapping.

During the occurrence of adult worms, insecticidal lamps are used to trap and kill them in concentrated and continuous pieces, and the control effect can be improved with sexual attractants and food attractants.

The third is larval control.

Chemical control is the most effective measure for the control of fall armyworm larvae at present, seize the best period of young larval control, and the best application time is to choose early morning or evening, and pay attention to spraying on corn heart leaves and ears.