These fertilizers have the effect of controlling pests and diseases "winning pesticides"!

First, nitrogen fertilizer

Nitrogen fertilizers such as ammonium bicarbonate and ammonia water have strong volatility and have certain stimulating, corrosive and fumigation effects on pests, especially for small spiders, aphids, thrips and other small insects with weak endurance.

Application method: Spray evenly with 1% ammonium hydrogencarbonate or 0.5% ammonia aqueous solution, spray once every 5 to 7 days, and spray 2 to 3 times.

Urea has the function of destroying the chitin of insects. It is prepared by mixing urea, washing powder and water in a ratio of 4:1:400. It is a kind of aphid, cabbage caterpillar and red spider that is harmful to cotton, vegetables and flowers. Various pests such as beads 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

Superphosphate: The oxalic acid secreted by the glandular hairs on the cotton tender head has an attracting effect on the cotton bollworm moth, and the oxalic acid can be converted into calcium oxalate by using 1% to 2% calcium perphosphate leaching solution for foliar spray fertilizer during the adult stage of cotton bollworm. And lost the lure of the cotton bollworm. This can reduce the amount of eggs in cotton fields by 33.3 to 73.4%, with an average of 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. It is sprayed once every half month from the initial flowering stage of tomato with 1% superphosphate leaching solution, and the effect of preventing 2 to 3 times is obvious.

Third, potash

Potassium can enhance the stress resistance of crops, and the application of potassium fertilizer can inhibit various crop diseases and insect pests.

According to reports, among the 740 fungal diseases and 68 bacterial diseases, 71% and 75% were reduced by potassium, respectively, and 59% of the 230 pests (螨) were mitigated.

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 with the soil. Reduce and increase the yield of vegetables by 15% to 20%;

At the beginning of wheat sheath blight, 30-40 kg of grass ash per acre is used. When the dew is not dry in the morning, the ridge is removed at the base of the wheat plant to control the spread of the disease;

For fruit trees that have root rot, first dig the root soil and scrape off the root bark of the disease. Dry it slightly and then embed 2.5 to 5 kilograms of plant ash per plant. After 1 to 2 months, the diseased tree can emit new roots.

Fourth, silicon fertilizer

After applying silicon fertilizer to crops, most of the silicon accumulates in the epidermal cells of the crops, forming a very hard epidermal layer, thereby enhancing its ability to resist pathogens and pests.

It has been shown that the application of 30-40 kg of silicon fertilizer per acre of corn, soybean and other crops can significantly reduce the damage of corn borer and soybean pod.

Application of silicon fertilizer in rice can increase the degree of silicification of epidermal cells, thus significantly enhance the resistance to pests and diseases, increase the grain weight, increase yield by 10% to 50%, reduce the incidence of rice blast by 0.3% to 19%, and reduce the incidence index by 0.5% to 13.9. %;

In the double-season rice area, the use of 1-3 to 1/2 returning 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 after the sweet pepper is planted and slowed down, and with 0.05%-0.1% zinc sulphate solution, and the fruit setting rate and single fruit weight are obviously increased, and the yield is increased by 15% to 37%.

Six, manganese fertilizer

When the Chinese cabbage is planted with the trace element manganese seed dressing, or sprayed once with 0.1% to 0.2% manganese sulfate solution in the seedling stage, rosette stage and core period of Chinese cabbage, it has significant control effect on Chinese cabbage heartburn. After the control, the yield can be increased by 10% to 18%, and the quality is improved.

(Taiwan Longtai Agricultural Xiao Yang was taken from "China Fertilizer Network")

This article URL: These fertilizers control pests and diseases effect "win pesticides"!

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