Phosphate fertilizer
Tomato umbilical rot is a physiological disease caused by calcium deficiency in plants. From the initial flowering stage of tomato, 1% superphosphate extract is sprayed every half a month, and the effect of spraying 2 to 3 times is obvious.
Silicon calcium fertilizer
(1) After applying silicon-calcium fertilizer to the crop, most of the silicon accumulates in the epidermal cells of the crop, forming a very hard epidermal layer, thereby enhancing its ability to resist infestation by germs and pests.
(2) Some data indicate that the application of 30-40 kg silicon-calcium fertilizer per acre of corn, soybeans and other crops can significantly reduce the damage of corn borer and viburnum; the application of silicon-calcium fertilizer in rice can increase the silicification of epidermal cells and thus resist The ability of pests and diseases is significantly enhanced, the grain weight is increased, and the yield is increased by 10% to 50%.
Nitrogen fertilizer
Ammonium nitrogen fertilizers such as ammonium bicarbonate and ammonia have strong volatility, and have a certain stimulating, corrosive and fumigant effect on pests, especially for small spiders, aphids, thrips and other small-sized, weak-tolerance pests. Application method: Spray evenly with 1% ammonium bicarbonate or 0.5% ammonia solution, spray once every 5-7 days, and spray 2 or 3 times.
Potash
Potassium can enhance the stress resistance of crops, and increasing the application of potassium fertilizer can inhibit a variety of crop diseases and insect pests. Among 740 fungal diseases and 68 bacterial diseases, 71% and 75% of them were alleviated by potassium.
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Real Time fluorescence quantitative PCR system is a variation of the standard PCR technique that is commonly used to
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