In agricultural production, farmers are most afraid of encountering pests and diseases. In fact, pests and diseases are a combination of diseases and insect pests.
Generally after encountering pests and diseases, farmers solve the problem is to spray pesticides. It is true that spraying pesticides can eliminate most pests and diseases, but it will also make some pests resistant. This requires pesticide production departments to constantly develop newer, new formulations and new doses of pesticides to deal with pests and diseases.
But now people pay more and more attention to health, when buying vegetables and fruits, they tend to choose green pollution-free, because everyone is worried that eating vegetables sprayed with pesticides will affect their health. So are there any ecological ways to prevent disease?
The main manifestation of pests and diseases is to nibble on the organs of plants, and then spread the virus. If you really calculate, among the pests that harm crops, there are not many insects that can really cause serious economic losses and need to be prevented from time to time. Probably only 1%.
In fact, in the world of pests, they also have their own natural enemies. At the very least, there will be three or two kinds of natural enemies, and there will even be dozens or even hundreds of kinds of natural enemies. Therefore, if you can use the law of natural enemies of pests, you can play a multiplier effect with half the effort, which can kill pests and avoid drug damage.
There are also different varieties of natural enemies of pests, which are distinguished according to the way insects are killed, including predatory predators and parasitic natural enemies.
First of all, let's talk about predatory predators, this type of species is more numerous and more common, such as the most common dragonflies, praying mantises, hunting bugs, stinging bugs, flower bugs, grasshoppers, ladybirds, walking bugs, insectivorous flies, aphid-eating flies, wasps, mud bees, spiders and predatory mites.
Predatory predatory predators generally have a good appetite, are the king of the stomach, they in the growth process, especially when developing, to eat a few, dozens, or even thousands of adult insects, will complete their own growth and development process. If it is subdivided, predatory seaworms are divided into two types, chewing and sucking according to different feeding methods.
For example, praying mantises feed mainly on adults and larvae such as flies, mosquitoes, locusts and moths, and sometimes eat their naked pupae, and insects such as crickets, cicadas, and crickets sometimes become their mouth food.
Like ladybugs, aphids, aphids, whiteflies, leaf mites, etc. on crops are all their favorite bites. Like a mite, its favorite food is mainly red spiders and rusty ticks.
There are also grasshoppers, which can prey on the eggs of pests such as whiteflies, red spiders and aphids, as well as cotton bollworms, ground tigers, silver-striped nocturnal moths, wheat moths and small bridge-building insects.
Bugs, on the other hand, are natural enemies of leafhoppers, planthoppers, aphids, thrips, and cotton leaf mites, and they can also eat cotton moth eggs.
Aphid-eating flies, just like its name, aphid-eating flies are mainly aphids, which can eat some aphids, shellworms, whiteflies, leafhoppers, thrips, and small larvae of Lepidoptera and other pests.
Let's talk about another natural enemy of pests: parasitic predators.
Parasitic predators are mainly insects that parasitize in the body of pests, and they feed mainly on the body fluids of pests or the internal organs of pests. They are represented by parasitic wasps and parasitic flies.
Parasitic bees, including red-eyed bees and cocoon bees, are small, are a class of tiny egg parasitic bees, able to parasitize in the eggs of various pests such as corn borers, armyworms, stripe borers, cotton bollworms, twill moths and ground tigers. Cocoon wasps can parasitize a variety of moth and butterfly larvae and have a certain control over their numbers.
Parasitic flies, which can parasitize in the larvae of lepidoptera and leaf bee insects, can also parasitize in the celestial bull, and will also be parasitic by parasitic flies in the larvae of scarabs that survive in the soil, as well as adult insects such as beetles and tsubaki elephants.
The use of natural enemies of pests for biological control of diseases and insect pests, first of all, we must select excellent natural enemies. Natural enemies must have a strong ability to find a host, and have a strong ability to spread, have a strong adaptation to the environment, and have a strong selectivity for the host, so as to be beneficial to a large number of reproduction.
At the same time as there are pests and diseases in the field, it will actually be accompanied by a certain number and type of natural enemies. However, the time of occurrence will lag much later than the occurrence of pests and diseases, because the number of natural enemies of pests often cannot be suppressed by human intervention or the use of pesticides. At this time, it is necessary to artificially take some necessary measures, such as the rational use of pesticides, the protection of natural enemies from wintering and other methods to avoid harming natural enemies, and you can also release the purchased artificial breeding natural enemies to the field in the early stage of pests and diseases, and promote the reproduction of natural enemies to achieve the purpose of biological prevention and control of diseases and insect pests.