At present, the shortcomings caused by the long-term use of traditional chemical pesticides have been highlighted: pesticide residues in agricultural products have exceeded the standards, human and animal poisoning incidents have increased, pests have developed resistance, the number of natural enemy pests has decreased, and ecological balance has been destroyed. To this end, many highly toxic, high-residue, persistent pesticides have been banned.
Since January 1, 2007, five highly toxic organophosphorus pesticides such as methamidophos, parathion, methyl parathion, monocrotophos and phosphonamine have been completely banned for agricultural use. After these pesticides are banned, how do you choose alternatives? As a plant-derived pesticide in biological pesticides (formerly known as "soil pesticides"), it is now favored by people.
At present, the varieties that have obtained the pesticide three certificates are 0.1% arbutin-III emulsifiable concentrate, 0.3%, 0.5% azadirachtin insecticide emulsifiable concentrate, 2.5% vine emulsifiable concentrate, 3.5% hypertonic rotenone emulsifiable concentrate, 0.20%, 0.36%. , 0.60% matrine aqueous solution, 0.23% matrine emulsifiable concentrate, 1.1% matrine powder, 10% nicotine emulsifiable concentrate, 27% oleic acid nicotine emulsifiable concentrate, 0.5% shofar colchicine, 0.5% linalyl alcohol The solution, 4.1%, 81% allicin emulsifiable concentrate, and the like, and more than 30 compound preparations using these plant-derived pesticides as main components. The registered and controlled objects of these pesticides mainly focus on pests on vegetables and cotton, such as aphids, cabbage caterpillars, diamondback moths and cotton bollworms.
So, what are the advantages and disadvantages of plant-derived pesticides?
They have the following outstanding advantages: First, because the active ingredients contained in them are natural substances, rather than synthetic chemicals, they have a smooth degradation pathway in nature after application, which is less polluting to the environment; The insecticide has many insecticidal components and unique action modes, which makes the pests more resistant to drug resistance. Third, they generally have strong selectivity, low toxicity to humans, livestock and natural enemies, and relatively low development and use costs.
Of course, botanical pesticides also have some shortcomings. For example, most natural product compounds have complex structures, are difficult to synthesize or are too expensive to synthesize; active ingredients are easily decomposed, the preparation components are complex, and it is difficult to standardize; most botanical pesticides play a slow effect, leading to some farmers. The friend thought that the pesticide used had no effect. There are many spraying times and short residual period, which is not easy for farmers to accept. Because of the regional distribution of plants, there are many limiting factors in the selection of processing plants; the collection of plants is seasonal.
Plant-derived pesticides are generally water-based agents, which are easily decomposed by the action of sunlight or microorganisms. The half-life is short, the residual degradation is fast, and the enrichment mechanism is poor after being fed by animals. Therefore, the large-scale use of plant-derived pesticides generally does not produce phytotoxicity, which will reduce the pollution of pesticides to the environment, and is a truly pollution-free pesticide. At the same time, plant-derived pesticides also have a nutritional effect on crops, which can improve the nutritional value of agricultural products. Therefore, as people's demand for green foods has become stronger, people's understanding of plant-derived pesticides has become more profound.
Since January 1, 2007, five highly toxic organophosphorus pesticides such as methamidophos, parathion, methyl parathion, monocrotophos and phosphonamine have been completely banned for agricultural use. After these pesticides are banned, how do you choose alternatives? As a plant-derived pesticide in biological pesticides (formerly known as "soil pesticides"), it is now favored by people.
At present, the varieties that have obtained the pesticide three certificates are 0.1% arbutin-III emulsifiable concentrate, 0.3%, 0.5% azadirachtin insecticide emulsifiable concentrate, 2.5% vine emulsifiable concentrate, 3.5% hypertonic rotenone emulsifiable concentrate, 0.20%, 0.36%. , 0.60% matrine aqueous solution, 0.23% matrine emulsifiable concentrate, 1.1% matrine powder, 10% nicotine emulsifiable concentrate, 27% oleic acid nicotine emulsifiable concentrate, 0.5% shofar colchicine, 0.5% linalyl alcohol The solution, 4.1%, 81% allicin emulsifiable concentrate, and the like, and more than 30 compound preparations using these plant-derived pesticides as main components. The registered and controlled objects of these pesticides mainly focus on pests on vegetables and cotton, such as aphids, cabbage caterpillars, diamondback moths and cotton bollworms.
So, what are the advantages and disadvantages of plant-derived pesticides?
They have the following outstanding advantages: First, because the active ingredients contained in them are natural substances, rather than synthetic chemicals, they have a smooth degradation pathway in nature after application, which is less polluting to the environment; The insecticide has many insecticidal components and unique action modes, which makes the pests more resistant to drug resistance. Third, they generally have strong selectivity, low toxicity to humans, livestock and natural enemies, and relatively low development and use costs.
Of course, botanical pesticides also have some shortcomings. For example, most natural product compounds have complex structures, are difficult to synthesize or are too expensive to synthesize; active ingredients are easily decomposed, the preparation components are complex, and it is difficult to standardize; most botanical pesticides play a slow effect, leading to some farmers. The friend thought that the pesticide used had no effect. There are many spraying times and short residual period, which is not easy for farmers to accept. Because of the regional distribution of plants, there are many limiting factors in the selection of processing plants; the collection of plants is seasonal.
Plant-derived pesticides are generally water-based agents, which are easily decomposed by the action of sunlight or microorganisms. The half-life is short, the residual degradation is fast, and the enrichment mechanism is poor after being fed by animals. Therefore, the large-scale use of plant-derived pesticides generally does not produce phytotoxicity, which will reduce the pollution of pesticides to the environment, and is a truly pollution-free pesticide. At the same time, plant-derived pesticides also have a nutritional effect on crops, which can improve the nutritional value of agricultural products. Therefore, as people's demand for green foods has become stronger, people's understanding of plant-derived pesticides has become more profound.
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