The types of natural enemies in the orchard are rich in natural enemies, including parasitic, predatory and pathogenic natural enemies. The natural control of parasitic natural enemies on pest populations is obvious. On the one hand, these potential pests can be controlled without causing damage. For example, the white larvae larvae are harmed by a species of the genus Ixora, which are sporadic for a long period of time. The control of hard rubber bond pests precedes economic damage caused by the damage. The parasitism rate of aphids on the population of aphids can reach 70%, causing the larvae to die before the third instar.
Predatory natural enemies, including birds, spiders, ladybugs, grasshoppers, etc., are generally omnivorous, have a wide selection of host pests, and their populations are relatively stable. Therefore, natural control of pests is far more important than parasitic natural enemies. Great. Spiders account for 80-90% of predatory natural enemies. Because spiders are characterized by large numbers, high reproductive rates, and many species, their control of pest populations in citrus orchards is even more pronounced. According to research reports, within a certain range of prey, each spider can prey on 6-10 insect pests, and the control effect on the green-leaved beetle can reach more than 60%. Besides spiders, the predation of predatory mites on pests Also great.
Pathogenic natural enemies include bacteria, fungi, and viruses. The control effect of the whitefungus blackflies fungus on the black locust whitefly is very prominent. After isolation and propagation, its control effect can reach 83-87%. The orange orchard insect virus resources are relatively abundant. According to incomplete statistics, more than 50 viruses have been isolated from orange pests. Some of the major pests are naturally constrained by the virus. Experimental studies have shown that the use of viruses to treat pests is a safe, effective, economical and simple means of biological control. At present, China has virus production.
Methods for Biological Control 1 To create a good ecological environment for natural enemies Preservation of pine, brown, buckwheat and other protective forests and street trees around the orchard, or fruit and grass intercropping, young plants growing green manure, and summer and winter fruit trees in rows, all can be Create good habitats and breeding grounds for natural enemies. In the course of carrying out agricultural work such as orange garden cultivation and pruning, the natural enemies are given a buffer zone to reduce the damage to natural enemies. In an orchard with a relatively simple ecological environment, artificial nests can be set up to attract and protect birds such as big tits, thrushes and starlings.
2 Combine with agricultural measures to protect the natural enemies from pruning in the orange orchard, and planting branches and leaves from the stands, and then concentrate them near the orange orchard to allow the natural enemies to fly back to the garden before handling. Artificially removed pests, egg masses, insects, and protective bursa have many natural enemies. They should be put into the parasitoid protection device or piled in a suitable place until the parasitoids, parasites, and other natural enemies fly back to the orchard. Focus on processing.
3 Natural Enemies for Artificial Relocation In the orange garden, pests and natural enemies often accompany, especially parasitic and predatory natural enemies. When pests occur, the number of natural enemies also gradually rises. With the increase in the number of natural enemies, when the number of pests decreases, the natural enemies are lack of food and often kill each other, reducing the number of natural enemies. Therefore, from the land where the natural enemies are dense, pairs of natural enemies can be transferred to fewer natural enemies and the host has more land to exert their control and expand breeding.
4 The introduction of microorganisms to cure insect orchards is relatively stable in ecological environment with appropriate temperature and humidity, which is extremely conducive to the reproduction and epidemic of pathogenic microorganisms. It is possible to isolate various bacteria such as thuringiosis from the diseased corpses of orange pests and then release them to the park. Can cause reinfection and epidemic well. The Beauveria bassiana, Cordyceps sinensis, Bacillus thuringiensis and Chaetomium nuclear polyhedrosis virus introduced from all over the country can establish populations and spread well in the park.
5 Establishment of intermediate host and supplementary nutrient bases for natural enemy insects After parasitizing natural enemy insects (parasitoids, helminths) and predatory natural enemy insects (hoverfly flies) are eclosion, it is necessary to suck nectar to supplement nutrition, and then find the host to lay eggs for spawning. Reproduction. Therefore, in order to prolong the life of natural enemies and increase the amount of eggs laid, the nectar plants that bloom at different periods can be planted around the orchard to serve as natural enemies and supplementary nutrition bases. At the same time, they can also beautify the environment of the orchard.
Predatory natural enemies, including birds, spiders, ladybugs, grasshoppers, etc., are generally omnivorous, have a wide selection of host pests, and their populations are relatively stable. Therefore, natural control of pests is far more important than parasitic natural enemies. Great. Spiders account for 80-90% of predatory natural enemies. Because spiders are characterized by large numbers, high reproductive rates, and many species, their control of pest populations in citrus orchards is even more pronounced. According to research reports, within a certain range of prey, each spider can prey on 6-10 insect pests, and the control effect on the green-leaved beetle can reach more than 60%. Besides spiders, the predation of predatory mites on pests Also great.
Pathogenic natural enemies include bacteria, fungi, and viruses. The control effect of the whitefungus blackflies fungus on the black locust whitefly is very prominent. After isolation and propagation, its control effect can reach 83-87%. The orange orchard insect virus resources are relatively abundant. According to incomplete statistics, more than 50 viruses have been isolated from orange pests. Some of the major pests are naturally constrained by the virus. Experimental studies have shown that the use of viruses to treat pests is a safe, effective, economical and simple means of biological control. At present, China has virus production.
Methods for Biological Control 1 To create a good ecological environment for natural enemies Preservation of pine, brown, buckwheat and other protective forests and street trees around the orchard, or fruit and grass intercropping, young plants growing green manure, and summer and winter fruit trees in rows, all can be Create good habitats and breeding grounds for natural enemies. In the course of carrying out agricultural work such as orange garden cultivation and pruning, the natural enemies are given a buffer zone to reduce the damage to natural enemies. In an orchard with a relatively simple ecological environment, artificial nests can be set up to attract and protect birds such as big tits, thrushes and starlings.
2 Combine with agricultural measures to protect the natural enemies from pruning in the orange orchard, and planting branches and leaves from the stands, and then concentrate them near the orange orchard to allow the natural enemies to fly back to the garden before handling. Artificially removed pests, egg masses, insects, and protective bursa have many natural enemies. They should be put into the parasitoid protection device or piled in a suitable place until the parasitoids, parasites, and other natural enemies fly back to the orchard. Focus on processing.
3 Natural Enemies for Artificial Relocation In the orange garden, pests and natural enemies often accompany, especially parasitic and predatory natural enemies. When pests occur, the number of natural enemies also gradually rises. With the increase in the number of natural enemies, when the number of pests decreases, the natural enemies are lack of food and often kill each other, reducing the number of natural enemies. Therefore, from the land where the natural enemies are dense, pairs of natural enemies can be transferred to fewer natural enemies and the host has more land to exert their control and expand breeding.
4 The introduction of microorganisms to cure insect orchards is relatively stable in ecological environment with appropriate temperature and humidity, which is extremely conducive to the reproduction and epidemic of pathogenic microorganisms. It is possible to isolate various bacteria such as thuringiosis from the diseased corpses of orange pests and then release them to the park. Can cause reinfection and epidemic well. The Beauveria bassiana, Cordyceps sinensis, Bacillus thuringiensis and Chaetomium nuclear polyhedrosis virus introduced from all over the country can establish populations and spread well in the park.
5 Establishment of intermediate host and supplementary nutrient bases for natural enemy insects After parasitizing natural enemy insects (parasitoids, helminths) and predatory natural enemy insects (hoverfly flies) are eclosion, it is necessary to suck nectar to supplement nutrition, and then find the host to lay eggs for spawning. Reproduction. Therefore, in order to prolong the life of natural enemies and increase the amount of eggs laid, the nectar plants that bloom at different periods can be planted around the orchard to serve as natural enemies and supplementary nutrition bases. At the same time, they can also beautify the environment of the orchard.
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