1. Pursuit of quick-impactness. Many vegetable farmers always like to choose quick-acting when choosing pesticides and fertilizers, because the quick-acting pesticides and fertilizers show their effects soon after they are used. Although some pesticides and fertilizers work well, they are not effective for the farmers because of the slow performance. For example, some foliar fertilizers contain hormones or nitrogen-based fertilizers, which are effective after a few days of spraying. However, this rapid growth is only a long-term, unfavorable to the entire growth and development process of the plant. Pursuit of quick-acting properties when using insecticides, and hope to kill pests immediately after spraying. However, some biological pesticides such as Bt or avermectin insecticides are not easy to show effects because they only kill eggs or inhibit insect molting or slow effect, and are often not recognized by vegetable farmers. The most serious consequence of the quick-acting effect of vegetable farmers is that the use of highly toxic, highly toxic and high-residue pesticides in some places still exists, and the residues of pesticides produced exceed the standard.
2. Blindly pursue new differences. At present, there are many kinds of pesticides and fertilizers on the market, among which there are some pesticides with incomplete “three certificates†and fertilizers produced without license. Some farmers prefer to use newer pesticides and fertilizers. Pesticide is an example. Although the use of new pesticides can prevent the resistance of certain pests and diseases, many pesticides are mainly used as a compounding agent, which will increase the amount of use and cause phytotoxicity. At the same time, some pesticides and fertilizer products have not been promoted, and their effects are not well understood, and problems are prone to occur.
3. Too much belief in the efficacy of certain fertilizers and pesticides. Many fertilizers and pesticides have a scope of application. When purchasing pesticides and fertilizers, they will be bought and used as long as they are marked. If some pesticides are indicated to cure fungi, bacteria, viruses and other diseases, they will be purchased as good pesticides.
4. Excessive application. Many vegetable farmers use fertilizers and pesticides excessively. When using pesticides, the dosage is several times or even ten times that of common drugs, which often causes phytotoxicity. The application rate of organic fertilizer and chemical fertilizer is several times of the applicable amount, and often causes fat damage, which causes the roots of the crop to burn and affect the yield. At the same time, excessive application of one or several chemical fertilizers may cause salinization of the soil.
5. Improper use. When applying fertilizer, choose the appropriate method of use, such as spraying or spraying fertilizer at different growth stages, and whether the organic fertilizer is fully decomposed. If not applied in a proper manner, it will cause damage. If unfertilized chicken manure is applied, harmful gases can be generated and harmful bacteria in the feces can be carried into the shed.
6, can not prescribe the right medicine, reasonable fertilization. This is a common problem in the current vegetable production. Many vegetable farmers lack the necessary knowledge of plant protection and fertilizer, and cannot diagnose correctly after the onset of symptoms. Instead, they use drugs blindly and use fertilizer. Especially when vegetables lack certain nutrients, the wrong application of another fertilizer can not only cure the disease, but may increase the disease.
7, a variety of pesticides mixed use. A major problem currently exists is that many vegetable farmers use five to eight kinds of fungicides, such as micro-fertilizers, insecticides, and viricides, which not only affect the efficacy, but also cause phytotoxicity and affect crop growth.
2. Blindly pursue new differences. At present, there are many kinds of pesticides and fertilizers on the market, among which there are some pesticides with incomplete “three certificates†and fertilizers produced without license. Some farmers prefer to use newer pesticides and fertilizers. Pesticide is an example. Although the use of new pesticides can prevent the resistance of certain pests and diseases, many pesticides are mainly used as a compounding agent, which will increase the amount of use and cause phytotoxicity. At the same time, some pesticides and fertilizer products have not been promoted, and their effects are not well understood, and problems are prone to occur.
3. Too much belief in the efficacy of certain fertilizers and pesticides. Many fertilizers and pesticides have a scope of application. When purchasing pesticides and fertilizers, they will be bought and used as long as they are marked. If some pesticides are indicated to cure fungi, bacteria, viruses and other diseases, they will be purchased as good pesticides.
4. Excessive application. Many vegetable farmers use fertilizers and pesticides excessively. When using pesticides, the dosage is several times or even ten times that of common drugs, which often causes phytotoxicity. The application rate of organic fertilizer and chemical fertilizer is several times of the applicable amount, and often causes fat damage, which causes the roots of the crop to burn and affect the yield. At the same time, excessive application of one or several chemical fertilizers may cause salinization of the soil.
5. Improper use. When applying fertilizer, choose the appropriate method of use, such as spraying or spraying fertilizer at different growth stages, and whether the organic fertilizer is fully decomposed. If not applied in a proper manner, it will cause damage. If unfertilized chicken manure is applied, harmful gases can be generated and harmful bacteria in the feces can be carried into the shed.
6, can not prescribe the right medicine, reasonable fertilization. This is a common problem in the current vegetable production. Many vegetable farmers lack the necessary knowledge of plant protection and fertilizer, and cannot diagnose correctly after the onset of symptoms. Instead, they use drugs blindly and use fertilizer. Especially when vegetables lack certain nutrients, the wrong application of another fertilizer can not only cure the disease, but may increase the disease.
7, a variety of pesticides mixed use. A major problem currently exists is that many vegetable farmers use five to eight kinds of fungicides, such as micro-fertilizers, insecticides, and viricides, which not only affect the efficacy, but also cause phytotoxicity and affect crop growth.
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