What drugs should be chosen for chemical control of corn elephants?

Corn borer: straw crushed and returned to the field to reduce the number of insect sources; During the emergence period of overwintering adults, insecticidal lamps combined with sexual attractants were used to trap them. Adults release their red eyes to kill eggs at the early stage of egg laying. Spray Bacillus thuringiensis preparations at the end of the heart leaf, or spray with chlorantraniliprole, thiamethoxam, cyhalothrin and other agents and emamectin salt, and the ground pests are corn borer, cotton bollworm, armyworm, caterpillar, heartworm, beet armyworm, Coleoptera brown foot pectoral carapace, etc.

In addition to gray planthoppers and aphids, which can transmit viral diseases, stinging and sucking pests also include hemipteran red-whiskered bugs, green blind bugs and mites such as red spiders.

Morphological characteristics: Female adults are divided into long-winged, semi-long-winged and short-winged. The body is small, dark yellow, with dark gray spots on the chest.

The forewings are grayish-yellow, long and narrow, with few but conspicuous veins, and long hairs on the margins. The semi-long wings are only as long as the 5th abdominal segment, and the short-winged wings are slightly triangular-shaped buds. In order to ensure a high yield of maize, it is necessary to have a good soil environment, so it is necessary to select the land in advance and prepare the land before planting.

The root system of corn is very developed, has strong adaptability, and does not have very strict requirements for soil species, but because of its own relatively tall plants, many branches and many roots.

Big borer: The reduction in rice area may aggravate the damage in corn fields. The control measure is to sprinkle granules such as phosphine into the heart leaves.

It can also be sprayed 1000 to 1500 times with pesticides such as pine borer and fast killing, and pay attention to spraying in the basal leaf sheath. Corn spot is a common leaf disease in maize regions around the world. The disease in the summer maize area of China is more severe than that of spring maize, and pandemic years can cause greater losses.

The lesions are mainly concentrated on the leaves, generally starting from the lower leaves and gradually spreading upwards. The lesions are initially water-soaked.

Hazard characteristics: armyworm has strong fecundity, selective egg-laying sites, and eggs are mostly produced at the tips of dead leaves on tall crops such as corn and sorghum. After the larvae hatch, they concentrate on feeding on the young leaf mesophyll in the trumpet, and the 3rd instar eats the leaves, and the 5th instar eats the amount of food, and the leaves can be eaten up.

On corn, it is mostly inhabited by flares.

In fact, corn elephants are very easy to beat, you can kill them with fenvalerate and a little chlorpyrifos. The use of imported pesticides is more effective. Hope it helps, hope.

Herbicides or insecticides should be chosen to prevent them in advance and to eliminate the disease in the simplest way.

Potassium permanganate solution should be chosen and then sprayed once every 10 days, so that it can have a certain preventive effect.