The use of chemical fertilizers or organic fertilizers to control crop pests and diseases is not only economic, safe and effective, but also saves pesticides .
At the same time, it has the characteristics of fertilizing and not harming natural enemies and not polluting the environment. It can be said that it is worth living in one fell swoop and it is worth promoting in production.
First, nitrogen fertilizer
Nitrogen fertilizers Ammonium bicarbonate, ammonia and other ammonium nitrogen fertilizers have strong volatility. They have certain stimulating, corrosive and fumigation effects on pests, especially for small spiders, aphids, thrips and other small insects with weak endurance.
Method of application: Spray evenly with 2% ammonium bicarbonate or 0.5% aqueous ammonia solution every 5 to 7 days for 2 to 3 times.
Urea has the function of destroying chitin of insects. Urea, washing powder and water are mixed in a ratio of 4:1:400. The "salt mixture" is a pair of aphids, cabbage caterpillars and red spider beads that are harmful to cotton, vegetables and flowers. A variety of pests have good control effects.
It is effective to spray with 50% fresh urine or 3% ammonium sulfate aqueous solution when wheat rust occurs sporadically.
Second, phosphate fertilizer
The oxalic acid secreted by the glandular hair on the tender head of the phosphate fertilizer has an attracting effect on the cotton bollworm moth;
In the adult cotton bollworm adult stage, 1% to 2% calcium perphosphate leaching solution for foliar spray fertilizer can change oxalic acid into calcium oxalate and lose the attraction to cotton bollworm.
In this way, the amount of eggs in the cotton field is reduced by 33.3 to 73.4%, and the average duration is 55%; the duration of each spraying of phosphorus is generally 2 to 3 days.
Tomato umbilical rot is a physiological disease caused by calcium deficiency in plants. From the beginning of tomato flowering period, 1% calcium perphosphate leaching solution is sprayed once every half month for 2 to 3 times.
Third, potash
Potassium fertilizer can enhance the stress resistance of crops. Potassium fertilizer can inhibit various crop diseases and insect pests.
It is reported that 71% and 75% of the 740 fungal diseases and 68 bacterial diseases are reduced by potassium, and 59% of the 230 pests (螨) have the effect of reducing the damage.
The potash fertilizer that is directly used for controlling crop diseases and insect pests in production is grass ash. Grass ash is a kind of high-quality potash with phosphorus, calcium, magnesium, sulfur and boron, manganese, copper, zinc, molybdenum and other nutrients;
Soaking the filtrate with 50 kg of grass ash for 50 hours and then filtering the filtrate can effectively kill the mites on the crop;
In the cotton seedling stage, 20 to 25 kilograms of grass ash per acre can be used to increase the ground temperature to reduce the occurrence of cotton blight, anthracnose, red rot, etc.;
Before the planting of onion, garlic or leeks, 20 kg of grass ash per acre is applied to the bottom of the ditch or 15 kg of grass ash per acre in the seedling stage of onion, garlic, leeks and other vegetables, and then the soil is covered to reduce the damage of the root mites. And increase the yield of vegetables by 15% to 20%;
At the beginning of wheat sheath blight, 30-40 kg of grass ash per mu is used. When the morning dew is not dry, the ridge is removed at the base of the wheat plant to control the spread of the disease;
For the fruit trees that have root rot, first dig the roots and scrape the roots and scrape off the roots of the disease. Then, each plant is planted with 2.5 to 5 kg of ash, and a new root can be emitted after about 1 to 2 months.
Fourth, silicon calcium fertilizer
Most of the silicon in the silicon-calcium fertilizer crops accumulate in the epidermal cells of the crops to form a very hard epidermal layer to enhance their ability to resist pathogens and pests.
There is data that the application of 30-40 kg of silicon-calcium fertilizer per acre of corn, soybean and other crops can significantly reduce the damage of corn borer and soybean pod.
Application of silicon-calcium fertilizer in rice can increase the degree of silicification of epidermal cells, so the resistance to pests and diseases can be significantly increased. The increase in grain weight can increase yield by 10% to 50%. The incidence of rice blast disease decreases by 0.3% to 19%, and the incidence index decreases by 0.5% to 13.9%.
In the double-season rice area, the use of 1/3 to 1/2 of the early rice straw with high silicon content can reduce the neck rickets by 2.63% to 7.23%, and the rice leaf roller is also significantly reduced.
Five, zinc fertilizer
Zinc fertilizer can be used to reduce the occurrence of viral diseases and increase the fruit setting rate and single fruit weight by 15% to 37% after the sweet pepper is planted and the seedlings are slowed down and the results are sprayed with 0.05%-0.1% zinc sulfate solution.
Six, manganese fertilizer
Manganese fertilizer is sprayed with trace element manganese in the sowing of Chinese cabbage or sprayed with 0.1%-0.2% manganese sulfate solution in the seedling stage, rosette stage and core period of Chinese cabbage, which has significant control effect on Chinese cabbage heartburn. It can increase production by 10% to 18% and improve the quality.
More pesticide knowledge , please pay attention to China Pesticide Network
Heavily Hot-Dip Galvanized Wire
Heavily Hot dipped Galvanized Wire
Zinc: 200-350g/m2
T/S: 380-500Mpa
Packing: plastic film inside, hessian woven bag or nylon woven outside
Shen Zhou City Hongda Hardware Products Co.,Ltd is a family owned company, founded in 1998, loacated at Tang feng industry zone, Shen Zhou. It has covered an area of 20 hectares, with a total asset of 20 million and more than 300 people with 80 engineering technicians, a 5-person research group, and a service group dedicated to provide the best solutions.
Heavily Hot-Dip Galvanized Wire,Heavily Galvanized Wire,Heavily Hot Dipped Wire,Woven Mesh Gabions
Shenzhou City Hongda Hardware Products Co.,Ltd , https://www.hdgabion.com