The color of Spodoptera exigua (Spodoptera exigua) is turquoise, commonly known as caterpillar, which is not the same as Pieris rapae. Spodoptera exigua is omnivorous, and its occurrence time is similar to that of Spodoptera litura, but its peaks are different, resulting in drug resistance, which is the characteristic of this insect. Therefore, the prevention and treatment of Spodoptera exigua should pay attention to the correct determination report, capture pheromones and other measures, and more importantly, choose new high-efficiency and low-toxicity pesticides to kill young larvae in the peak season. The mixed spraying of flufenuron and flufenhydrazine is very effective in the main vegetable markets which are widely used as specific drugs to control Spodoptera exigua. The disadvantage is that it is a bit expensive. Generally speaking, it is used when the insect state is particularly serious and difficult to control. Bacillus Xiaoyun (BT) is also very good, but the effect is slow, so it is necessary to use the medicine in advance. Otherwise, there are too many defective fruits and vegetables, which will cause economic losses. Rhinitis onychomycosis and its mixed Cordyceps preparations can be used alternately, which can treat Spodoptera litura and moth at the same time, and have a good effect on older larvae.

in the egg stage, it is white in color, round in the shape of steamed bread, with radioactive ridges on its surface. In the larval stage, the back color is mostly dark green or dark brown, and the abdomen has obvious yellow and white bands. In adult, the head, chest and front wings are grayish brown, the rear wings are white, and the veins and bottom line are black. Let me take peanuts as an example to illustrate how to prevent beet armyworm. If it is a plot of wheat and peanut rotation, it is suggested that after peanut harvest, deep ploughing should be carried out before planting wheat to eliminate some overwintering pupae. If it is a planting area in the first quarter of a year, deep ploughing should be carried out before peanut harvest to achieve the effect of removing pupae. If the planting area is small, it is best to find Spodoptera exigua on the leaves in the field, directly remove the damaged leaves and take them out of the field, but if the planting area is large, this method is not suitable and so many people cannot be used.

Black lights can be placed in fields to trap Spodoptera exigua adults. This method can also reduce the damage to peanuts, which is used by many growers. Using natural enemies for prevention and prevention, the natural enemies of Spodoptera exigua mainly include grass, spider, beetle, etc. Interested farmers can try. Comprehensive prevention and treatment of Spodoptera exigua originally belongs to southern pests, so the overwintering soil layer is shallow, which can be reduced and supplemented by winter irrigation in autumn scenery. Adults can be attracted by black lights and soup. Using its suspended animation, you can catch true joy, larvae or eggs at night or at dinner.

timely prevention and treatment. Spodoptera exigua is afraid of light and comes out during the day and night, so it is best to choose the prevention time before 93363 minutes in the morning or after 17336 in the afternoon. At the same time, the resistance of larvae over 3 years old is obviously improved, so we should concentrate on killing them before 3 years old in prevention and treatment. You can choose 5% phoxim emulsifiable concentrate 1 times, 2% Xi 'an polyurethane emulsifiable concentrate 2~3 times and 2.5% bromocyanide emulsifiable concentrate 3 times. 4. Physiological control: Insect growth regulators, also known as insect chitin synthesis inhibitors, can be used. 2% or 25% adhesive of domestic mierouurea No.1 (also known as insecticide, insecticide, trifluralin, isoflurane and chlorpyrifos) or mierouramine No.3 (also known as small urea No.1).