Habits of Spodoptera litura.
Spodoptera litura is a kind of food-loving pest, which is widely distributed all over the country and can harm many crops and flowers. The eggs of Spodoptera litura look like steamed bread, with vertical and horizontal stripes and luster on the surface. They were milky white at first, then gradually turned dark yellow, and dozens or even hundreds of them were integrated into 2? Three layers of egg balls. The newly hatched larvae of Spodoptera litura are yellow-green, with small white spots, and the adults grow up gradually. The back is dark green, the belly and back are light yellow, the back is orange, and the length of larvae is generally 32? 53mm. The adult is grayish brown, with silky brown antennae, grayish-white broad-band twill on the front wing and aqua-red flashing on the grayish-white rear wing. Adult wingspan is 32? 48 mm.
How to control Spodoptera litura?
Insecticide control can choose chlorantraniliprole, ethyl spinosad, methoxyfenozide, lufenuron, deltamethrin and other drugs. 7- 10 days after moth peak. But now this kind of insect is relatively resistant to drugs, and its control effect is average. However, some time ago, Bayer Crops Science listed a patented compound, Guoteng. The effective component is tetrazolium developed by Bayer company, which has high insecticidal activity and long duration. Effectively control LEPIDOPTERA pests. The most taboo of pest control is pest control, prevention is the main way of pest control, and the combination of prevention and control is king.
What is the harm of Spodoptera litura?
The vegetables that Spodoptera litura harms on our side mainly include Chinese cabbage, Chinese cabbage, green vegetables, lettuce, spinach, eggplant, pepper, tomato, onion, potato, lotus root, taro, beans and melons. This pest eats too much. Larvae eat leaves, flowers, buds and faults, and leaves become holes or gaps in gluttony period, leaving only stalks. In order to prevent them, we must start small and act early.