Minimize the use of pesticides First of all, the selection of pest-resistant varieties is the most economical, safe and effective method to control pests and diseases . Secondly, in the early winter or in the summer, deep ploughing of cultivated land can kill some germs and eggs, and cooperate with the application. Fully decomposed organic fertilizer, strengthen field management after sowing, create environmental conditions suitable for crop growth and not conducive to the occurrence of pests and diseases, can effectively reduce the occurrence of pests and diseases. Heilongjiang Junhe Building Materials Technology Co., Ltd , https://www.junhejiancai.com
After applying pesticides to various crops, some pesticide residues or excess residues may remain on the surface, fruits and seeds of crops for a certain period of time, and some may penetrate into the wax layer or tissue inside the epidermis of crops. Some systemic agents can also be absorbed by crops and moved to other parts, leaving traces or excess pesticides or toxic metabolites in the harvested agricultural products.
It is important to pay attention to the application concentration, application amount, dosage form, frequency and application method of the pesticide. The pesticide residue has a larger amount of emulsion oil, followed by milk powder and wettable powder, and the water agent is lower. In the application method, seed treatment, soil treatment, and tree dressing have higher residues than spray and dusting. Special attention should be paid to the application of pesticides close to the harvest period of crops. It is necessary to select the types of medicaments with low toxicity and rapid decomposition and strictly control the dosage, concentration and number of applications.
Do not use banned pesticides According to the chemical nature and toxicity of pesticides, it is forbidden to use pesticides with high toxicity, high toxicity, strong accumulation and long-lasting effect on some crops. Such as chlordane, dicofol, etc., although not a highly toxic pesticide, but has a cumulative poisoning effect, prohibiting the use of vegetables, tea, tobacco, medicinal materials and other crops; parathion, phosphorus amine, methyl parathion, methamidophos , monocrotophos, etc. are absolutely prohibited from being used on crops. Aldicarb, phorate and carbofuran can only be used for seed treatment or soil treatment of cottonseed, wheat, corn, sugar beet, etc. It is strictly forbidden to spray on other crops.
Strictly observe the last application time before harvest according to the safety interval of various pesticides, and according to the principle of early treatment, in advance of the crop growth period and the early stage of pests and the initial inoculation of the bacteria, the pesticide residue can be greatly reduced.