According to the source and chemical properties, pesticides can be classified into inorganic pesticides, organic pesticides and biological pesticides.
Biological pesticides are pesticides processed from biological organisms such as bacteria, fungi, viruses, and other metabolites. The current bio-pesticides commonly used in production are as follows:
Bt emulsion: It is a commonly used bacterial bio-pesticide. Its finished product is beige emulsion. It has good emulsifying properties and wide insecticidal spectrum. It has a control effect on lepidopteran pests of more than 20 kinds of vegetables, tea, fruit, tobacco and other plants. 80%~90%, the main control objects are lepidopteran pests, such as pine caterpillar, corn borer, cotton bollworm, armyworm, rice leaf roller, tea caterpillar and so on. Bt emulsion is a kind of stomach poison. After the pests are eaten, it can cause perforation of the intestines. The things in the intestines flow into the body cavity, and finally the sepsis is dead. When using, please pay attention to the temperature above 15 ° C, the most suitable is 20 ° C, the application time should be 2 to 3 days earlier than the application of chemical pesticides.
Penicillium is used to control cabbage caterpillars. The pests eat the leaves with the green worms, the intestinal wall will also perforate quickly, and the worms will rot and die.
The bacillus is used to control rice leaf roller and rice mites, and can also control pests such as flies, mosquitoes, armyworms, pine caterpillars, white ants, and rice mites.
Beauveria bassiana is a fungal biopesticide with special effects against pine caterpillars and rice pests. Beauveria bassiana contacts the worm body and enters the pest through the body wall. It will soon germinate the hyphae and absorb the body fluid of the pest, causing the pest to die.
The Jinggangmycin-based microbial fermentation product is a special-effect agent for controlling Rhizoctonia solani and other diseases, and is also the largest bio-pesticide in China. It inhibits the hyphae of rice sheath blight and has an effective period of 15 to 20 days.
The antibiotics used in production include chrysanthemum, gentamicin, polymycin, oxytetracycline, griseofulvin, actinomycin and streptomycin. For example, Nongkang 120 is a new type of agricultural antibiotic, which has good control effect on powdery mildew of melon, fruit, vegetables, flowers, wheat, tobacco and rice sheath and wheat.
In general, biological pesticides have the advantages of being safe to plants, humans and animals, not polluting the environment, easy to obtain raw materials, and low production costs. They are a kind of pesticide with broad development prospects in crop pest control, but also It cannot be said that all biological pesticides are environmentally friendly, low toxic, green and organic. Their toxicity to humans and animals and the safety of environmental protection depend on the testing and evaluation of the drug regulatory authorities and environmental protection departments.
The use of biological pesticides requires special attention to the following two points: (1) Since some biological pesticides are living bacteria in the dormant stage or state, it is necessary to pay attention to the conditions of transportation and storage, generally requiring low temperature, dry, mildewproof, antifreeze, sunscreen, and less. Variety. Pay attention to the date of manufacture and the expiration date when purchasing.
(2) Strictly master the application technology. According to the dynamics of pests and diseases, accurately master the spraying time; the water quality requirements are relatively pure, and generally do not mix with other fungicides. The insecticide-killing agent should be hit by the pest feeding site; the contact-killing effect should be evenly distributed to the place where the pests frequently move.
(Author: China Agricultural University Professor Xiao Yue Yan)
Biological pesticides are pesticides processed from biological organisms such as bacteria, fungi, viruses, and other metabolites. The current bio-pesticides commonly used in production are as follows:
Bt emulsion: It is a commonly used bacterial bio-pesticide. Its finished product is beige emulsion. It has good emulsifying properties and wide insecticidal spectrum. It has a control effect on lepidopteran pests of more than 20 kinds of vegetables, tea, fruit, tobacco and other plants. 80%~90%, the main control objects are lepidopteran pests, such as pine caterpillar, corn borer, cotton bollworm, armyworm, rice leaf roller, tea caterpillar and so on. Bt emulsion is a kind of stomach poison. After the pests are eaten, it can cause perforation of the intestines. The things in the intestines flow into the body cavity, and finally the sepsis is dead. When using, please pay attention to the temperature above 15 ° C, the most suitable is 20 ° C, the application time should be 2 to 3 days earlier than the application of chemical pesticides.
Penicillium is used to control cabbage caterpillars. The pests eat the leaves with the green worms, the intestinal wall will also perforate quickly, and the worms will rot and die.
The bacillus is used to control rice leaf roller and rice mites, and can also control pests such as flies, mosquitoes, armyworms, pine caterpillars, white ants, and rice mites.
Beauveria bassiana is a fungal biopesticide with special effects against pine caterpillars and rice pests. Beauveria bassiana contacts the worm body and enters the pest through the body wall. It will soon germinate the hyphae and absorb the body fluid of the pest, causing the pest to die.
The Jinggangmycin-based microbial fermentation product is a special-effect agent for controlling Rhizoctonia solani and other diseases, and is also the largest bio-pesticide in China. It inhibits the hyphae of rice sheath blight and has an effective period of 15 to 20 days.
The antibiotics used in production include chrysanthemum, gentamicin, polymycin, oxytetracycline, griseofulvin, actinomycin and streptomycin. For example, Nongkang 120 is a new type of agricultural antibiotic, which has good control effect on powdery mildew of melon, fruit, vegetables, flowers, wheat, tobacco and rice sheath and wheat.
In general, biological pesticides have the advantages of being safe to plants, humans and animals, not polluting the environment, easy to obtain raw materials, and low production costs. They are a kind of pesticide with broad development prospects in crop pest control, but also It cannot be said that all biological pesticides are environmentally friendly, low toxic, green and organic. Their toxicity to humans and animals and the safety of environmental protection depend on the testing and evaluation of the drug regulatory authorities and environmental protection departments.
The use of biological pesticides requires special attention to the following two points: (1) Since some biological pesticides are living bacteria in the dormant stage or state, it is necessary to pay attention to the conditions of transportation and storage, generally requiring low temperature, dry, mildewproof, antifreeze, sunscreen, and less. Variety. Pay attention to the date of manufacture and the expiration date when purchasing.
(2) Strictly master the application technology. According to the dynamics of pests and diseases, accurately master the spraying time; the water quality requirements are relatively pure, and generally do not mix with other fungicides. The insecticide-killing agent should be hit by the pest feeding site; the contact-killing effect should be evenly distributed to the place where the pests frequently move.
(Author: China Agricultural University Professor Xiao Yue Yan)
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