What kind of medicine do corn heart-eating insects take?

Heart borer is one of the more common insect pests in corn. If the heart borer enters into the corn, it can not be controlled. Therefore, attention must be paid to prevention and control. So what kind of medicine do corn heart-eating insects take?

What kind of medicine is used by corn heart-eating insects

Once the heart borer is eaten into the fruit, it can not be controlled, so mastering the accurate control period is the key to control this kind of pest. For pear borer, peach borer, peach borer and other sex attractants can be hung in the orchard, check the number of trapping insects every day, generally 15 mu orchard can hang 1. When the number of trapped adults increases sharply, the eggs and fruits are checked every 3 days. When the egg-fruit rate reaches 1%, chemical control can be carried out. The main types of pesticides are pyrethroid pesticides, such as 20% permethrin, 2.5% deltamethrin, 10% cyhalothrin, 20% cypermethrin, 2.5% kungfu or 21% cypermethrin. If the occurrence of spider mites at the same time, you can use both antidote and kung fu.

II. Biological control

There are many beneficial insects in nature that control the occurrence of insect pests, mainly including:

1. Predatory predators. Such as lacewings, ladybugs, flower bugs, spiders, walking beetles, ants and so on can prey on the above pests.

two。 Parasites, natural enemies. For example, Trichogramma can parasitize many kinds of eggs, Ji wasp parasites pear heart borer, parasitoid cocoon wasp parasites peach heart borer and so on. The big heart borer fruit of the pear was dissected. If the parasitoid wasps for a long time, the fruit should be preserved, covered with gauze, and released after Eclosion of natural enemies, so that they can continue to destroy pests.

3. Protective measures. When natural enemies occur frequently, do not use total killing agents, but try to use other methods to control or avoid the occurrence of natural enemies, so as to give full play to the role of natural enemies in pest control.

III. Physical prevention and control

Set the black light. Many pests have phototaxis, and black lights are installed in orchards, which can trap and kill a variety of pests, such as pear heart borer, peach borer, cotton bollworm and so on.

two。 Sweet and sour booby traps. Can be used 1 part of sugar, 4 parts of vinegar, 16 parts of water, plus a small amount of trichlorfon, prepared into sweet and sour liquid filled in a bowl, hanging on the tree, to attract adults to eat, kill it, such as pear heart borer, peach borer, cotton bollworm and so on. Rotten fruit can also be placed in a jar to make fruit vinegar.

3. During the occurrence period of cotton bollworm, poplar, willow, Toona sinensis and other branches were inserted around the orchard, and several branches were made into one hand. the adult cotton bollworm drilled into the handle and killed in the early morning.

Corn heart borer must be controlled as soon as possible, pay attention to the control period, so as not to miss the best period, leading to a reduction in yield.