How to control fall armyworm? What pesticides are used for fall armyworm

What is fall armyworm and how to prevent fall armyworm damage?

Fall armyworm is an invasive extraterritorial pest native to South America, North America and the northeastern United States. Fall armyworm is a moth pest of the genus Spodoptera exigua in the family Noctuidae, when harming plants, it lays more than 100 eggs on the top of plant leaves, a normal female moth can lay more than 1,000 normal and effective eggs, when the temperature is about 25, after 3 days can produce ants, 2 10 hours later, it can begin to harm the young leaves or heart leaves of plants such as grasses, the larvae pupate after about 15 days, and need 10 12 days to transform into adults in the hottest time of the year, and the adult life span is about 12 days. The entire cycle of fall armyworm is 30 days from egg to adult death.

The main way of fall armyworm transmission is migration, an adult can migrate 100 kilometers overnight, and a generation spreads 500 kilometers around, and the transmission speed is very fast. Fall armyworm harms many plants. The larvae are edible and can harm 75 plant families and 350 plant species, mainly Poaceae, Asteraceae, Leguminaceae, etc.

At present, the most serious damage in China is corn, rice, sugarcane and soybean and other crops. Fall armyworm has the habit of cannibalism, when the larvae can begin to harm, the large larvae bite the small larvae, when the insect mouth is densely gathered, the cannibalism is very serious, there is a large extent the same kind through killing each other, reduce the number of insect populations, reduce the degree of larval damage, is a benefit to crop protection.

At present, there are three ways to control fall armyworm: biological control. There are 10 species of parasitic wasps in China, which can curb the development of fall armyworm, and can be stocked with parasitic wasps, such as red-eyed bees, which can play a certain degree of prevention effect.

Physical methods of prevention. The most efficient is the high-frequency black light, which uses the phototaxis of fall armyworm to trap and kill adults, which is highly efficient, drug-free and pollution-free, green and environmentally friendly, and is very applicable, which is the best way to control fall armyworm.

It is a chemical method of prevention. China has identified 24 kinds of pesticides to control fall armyworm, high efficiency and low toxicity, good control effect, such as deltamethrin, deltamethrin, cyhalothrin, cyhalothrin, cyhalothrin, indoxacarb, emamectin formate, acemethamidophos, chlorfenapyr, lice urea, chlorantraniliprole, Bacillus thuringiensis, Beauveria aeruginosa and other single agent control, you can also take the above 24 kinds of single agent optimization combination compound to form a more efficient method of prevention and control, are very good control effects.

In short, fall armyworm is a kind of noctuidae pest with strong migration and high degree of harm, and flexible and efficient control methods can be adopted to control pests and reduce the damage to crops according to the actual situation.

First of all, you must ensure that the grass is hygienic and clean, and then apply insect control drugs in advance, so as to effectively control it.

Use plant-specific insecticides, evenly spray on plant leaves, and should not be watered during the medication, otherwise there is no effect, you can spray several more times to consolidate it.

A large number of pesticides can be sprayed for control. It can also be used to prevent and control its natural enemies. Insecticidal eggs can be used in a way that is used during its breeding period.

<> when the fall armyworm eggs have just hatched into the ant insect stage, use 10% cypermethrin EC 1200-1600 times solution in the grassland, or use 25% chlorpyramid No. 3 suspension 1600-2000 times solution to spray evenly on the foliar surface, or use 5% cypermethrin EC 1200 1600 times solution to spray evenly on the plant stems and leaves, or use 10% imidacloprid wettable powder 4000 times solution to spray foliar spray.

1. The control of fall armyworm can be sprayed with cypermethrin, chlorantraniliprole, acemethamidophos, lice carica, pyrapyr, indene insectacarb, tetrachlorantraniliprole, cyhalothrin, cyfluthrin and other pesticides.

2. It can also be used in combination with any pesticide such as emamectin benzoate and indoxacarb, flubelluron, cyhalomethrin ester, chlorfenapyr, lice silver mite urea, fenozazide, etc.

3. Prevention needs to grasp the best period for the prevention and control of young larvae, and the best application time is in the early morning or evening, and attention should be paid to spraying on corn heart leaves, male ears and female ears. It can be controlled by spraying with high-efficiency and low-toxicity agents to control noctuidae pests.