Prevention of Yellow Tips

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1. Reasonably apply manure and chemical fertilizers. Manure should be thoroughly cooked and applied in appropriate amounts. According to the ratio of nitrogen, phosphorus, and potassium required by 3.35:0.98:2.29 of leeks, formula fertilization, do not apply single or excessive amounts of available nitrogen fertilizer such as ammonium bicarbonate or urea at a time.

2. Chong Shi is rich in 4% of humic acid, 30% of NPK, 30% of “scarab” brand Nitro-biochemical water-soluble fertilizer is 40 kg/mu and rich in N/P/K+ 55% (10:10:35), and contains calcium. , Zinc, Iron, Boron, Sulfur, Magnesium, Manganese, Copper (chelated) and other kinds of medium and micro-elements Eurasian water soluble fertilizer 5-6 kg, can regulate soil pH, potassium and a variety of nutrients, enhance plants The resistance to disease.

3. Pharmaceutical spray: 68.75% fluorescein propofol suspension 600 times liquid +10% green leaf powder 750 times liquid +10% very zinc calcium boron chelate 300 times; 10% suspension of cyclosulfazide 600 times liquid + Breed powder 750 times liquid +10% high boron active potassium calcium water 300 times; 27.5% benzoyl fluoride water liquid 600 times liquid +60% calorie calcium 750 times liquid +21% calorie boron 750 times liquid.

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