What are the natural enemies of aphids? Does aphid cocoon wasp control aphids?

For growers, aphids are the biggest headache. How to eliminate aphids? Who are aphids most afraid of? Aphids are becoming more and more difficult to treat nowadays, especially in April and May, when aphids are at a high incidence. Let's take a closer look at what are the natural enemies of aphids. Does aphid cocoon wasp control aphids?

What are the natural enemies of aphids?

There are many natural enemies of aphids, including ladybugs, aphid flies, aphid cocoon wasps, parasitoids, aphid gall mosquitoes, crab spiders, lacewings and entomopathogenic fungi. Among them, aphid cocoon wasp has the highest hit rate, according to some tests, as high as 98%. Contemporary agriculture and forestry have introduced a large number of aphid cocoon wasps to control insects, and aphid cocoon wasps have become a powerful force to eliminate aphids.

Aphid cocoon wasps belong to the family Hymenoptera, Hymenoptera, Aphididae. All species of this family are parasitic wasps in aphids. The aphid cocoon wasp mainly uses its eggs to subdue aphids. Every year during the spawning season, females begin to mate with drones, but females can lay eggs regardless of whether they mate or not. When laying eggs, the female stabs the ovipositor into the back of the aphid's abdomen and lays the eggs into the aphids, so that the eggs of the aphids are parasitized in the aphids. The eggs parasitic in the aphids develop into larvae there, which stimulates the aphids to eat more, gain weight, expand the body viciously, and finally become a grainy yellowish-brown or reddish-brown stiff aphid. There is another situation, some bee larvae secrete insect hormones in aphids, excessive hormones affect the normal development of aphids, make aphids abnormal metamorphosis, or die early, or never grow up, and eventually die. An aphid cocoon wasp can lay hundreds of eggs, each egg is a "bullet" fired at the aphid, and almost "bullet".

Does aphid cocoon wasp control aphids?

1. What is the aphid cocoon wasp?

Aphid cocoon wasp is a kind of parasitic wasp. To put it simply, it grows on others and absorbs other people's nutrients. Parasitoids are the most common parasitic insects, and their hosts are mainly aphids. The scientific use of aphid cocoon wasp can effectively control almost all kinds of aphids, such as vegetable aphid, peach aphid, soybean aphid and wheat aphid.

2. Why control aphids

Aphids are the fastest propagating insects on earth, which can reproduce 10-30 generations a year. One aphid may replicate 1 billion aphids. Female aphids can give birth as soon as they are born, and aphids can become pregnant without males. Aphids are one of the most destructive pests in the world, threatening not only tobacco leaves, but also vegetables, fruit trees and other plants.

3. How do aphid cocoon wasps control aphids?

The adult female wasp lays eggs in aphids. After the eggs hatch, the aphids feed on the tissues and organs of the aphids. The aphids become ossified to form aphids (the aphids have died). The parasitoid larva bites a small hole in the ventral side of the aphid and secretes viscose from the silk gland to stick the aphid to the plant. Then, the larvae spun cocoon and pupated with the help of the fine process of the body surface in the body cavity of the aphid. Finally, the baby parasitoid flew out as a bee, and continued to look for aphid parasitism.

A mature female aphid cocoon wasp with hundreds of eggs will find a suitable "home" for the eggs before the end of life. During spawning, the female bees gently tap the plant surface with their antennae as they crawl, find the smell left by the aphids through the olfactory receptors on the antennae, and track them all the way under the guidance of the smell until the aphids are found.

Although the aphid cocoon wasp has a very strong ability to control aphids, we should also pay attention to the release of aphid cocoon wasps to control aphids. At the same time, the effect of releasing aphid cocoon wasp when aphids are first seen is the best, and chemical control is recommended if a large number of aphids appear.