Prevention and control methods The prevention and control of pests and diseases in maize seedlings should adhere to the principle of “mainly prevention and comprehensive preventionâ€, focusing on agricultural control, selecting resistant varieties, making seed treatment, rational fertilization, appropriate selection of chemical control, and effectively controlling and reducing seedlings. The occurrence and harm of diseases and insect pests. Use strong varieties with strong resistance, 1-2 days before sowing, to increase the activity of enzymes, increase the application of agricultural fertilizer and phosphorus and potassium fertilizer; mix 200g seeds with 20% of rusting emulsion 200ml to control smut and top rot ; 5% phoxim emulsifiable concentrate 200-250 grams per acre plus water 10 times, sprayed in 25-30 kg of fine soil mixed into toxic soil, applied ridges, then shallow sputum, or with 3% carbofuran granules, or 5% phoxim granules, 2.5-3 kg per mu of treated soil, and treat both golden worms and cockroaches; seed coats, 20% Fokker, 1 kg of cytosol can be mixed with 35-45 kg of seeds, which can prevent diseases and diseases .
Reasonable close planting ensures that there is sufficient nutrient area per plant and strengthens field management. Foliar spray in the 4-5 leaf stage of maize to prevent zinc deficiency and enhance the disease resistance of plants.
Refers to the addition of a small amount of its solution can make the interface state of the material changes significantly. With a fixed hydrophilic lipophilic group, in the surface of the solution can be aligned. The molecular structure of the Surfactant is amphiphilic: one end is a hydrophilic group and the other end is a hydrophobic group; the hydrophilic group is often a polar group such as carboxylic acid, sulfonic acid, sulfuric acid, amino or amine and Its salts, hydroxyl groups, amide groups, ether bonds and the like can also be used as polar hydrophilic groups; and hydrophobic groups are often non-polar hydrocarbon chains, such as 8 carbon atoms above the hydrocarbon chain. Surfactants are divided into ionic surfactants (including cationic surfactants and anionic surfactants), nonionic surfactants, amphoteric surfactants, complex surfactants, other surfactants and the like.
Surfactant
Hexadecyltrimethylammonium Chloride, Dodecyl Trimethyl Ammonium Chloride, Octadecyl Dimethyl Ammonium Chloride
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