2. Spray potassium to prevent disease. In cotton, potassium deficiency often leads to stem blight disease during flowering and ringing. The cotton leaves are yellow-red and brittle, causing the cotton plant to prematurely decline production. Spray 0.3% potassium dihydrogen phosphate solution, 75 kg per acre whole plant spray, and even spray 2 or 3 times; or soaked with 5% of plant ash soaked in filtrate, can prevent decay and disease prevention. 3. Spray zinc to prevent falling bells. Zinc deficiency in cotton causes partial loss of green manure in leaves, young leaves wilting, and new young bells fall off. The zinc spray method is: Spraying 0.1 to 0.2% concentration of zinc sulfate or 75 kg of zinc chloride aqueous solution per acre, spraying once every 5 to 7 days, spraying 2 to 3 times continuously. 4. Spray Boron attack peach. The cotton plant lacks boron, the fruit branches are high in section, there are many lateral branches, and the leaves are thick. The buds of the buds are easy to open and fall off, resulting in buds without flowers, flowers without real, flowers with little bells, and small peaches with low yield and timely spraying. Boron, supplemented with boron nutrients, is beneficial to multi-fruited peaches and large peaches. Generally, from the flowering stage, once every 10 to 15 days, spraying 0.2% borax or 0.1% boric acid solution 75-100 kg per acre, spraying 2 or 3 times continuously, spraying 0.5% urea, Better results. 5. Spray phosphorus to promote premature. From late August, use superphosphate 1 kg plus water 50 kg, soak for 24 hours (frequent stirring), filter to residue, spray 100 kg per mu with filter solution, or spray 300-500 times with potassium supplement. Potassium dihydrogen phosphate solution 100 kg, every 5 to 7 days once, and even spray 2 or 3 times, can make cotton plants grow robustly, promote cotton boll development and full seeds, increase boll weight, advance boll scum.
Premix: premix refers to the powder or granular preparation made by the uniform mixture of drug and suitable matrix. The premix was administered through the feed at a certain drug concentration.
Relevant regulations Premix Veterinary Medicine,Veterinary Multivitamin Premix,Veterinary Florfenicol Premix,Veterinary Oxytetracycline Premix Shandong Unovet Pharmaceutical Co.,Ltd. , https://www.unovetcn.com
1. The drugs in the premix should be dried and crushed first. Unless otherwise specified, it shall pass through No. 4 sieve completely, and the mixture of powder that can pass No. 5 sieve shall not exceed 10.0%.
2. The matrix used in the premix includes carrier, diluent, etc. The matrix should be stable, good fluidity, easy to mix with drugs and feed. The fatty matrix should be degreased first. In addition to the substrate specified under each variety, other suitable substrates can also be selected. In general, a single substrate should be used. The matrix shall not contain more than 20 parts per million of heavy metals; Arsenic salt shall not exceed 2 parts per million; The drying loss of inorganic matrix and organic matrix should not exceed 3.0% and 8.0% respectively.
3. According to the property of the drug, the drug can be dispersed evenly by proper methods. Appropriate methods should be used to make the drug mix evenly in the preparation of low concentration drug premix.
4. The premix should have good fluidity and be easy to mix with feed.
5. Unless otherwise specified, the premixes shall be stored in a closed container. The premixes containing volatile drugs or easily hygroscopic drugs shall be stored in a closed container, and the microbial limit shall be controlled.
6. Unless otherwise specified, the label of premix shall also indicate the name of matrix.
Late cotton spray fertilizer tips
1. Spray nitrogen to prevent premature aging. In late August to early September, nitrogenous fertilizers are sprayed on the leaves to keep the leaves of the cotton green, enhance photosynthesis, prevent premature aging, and increase production. The method is to use 1% urea solution 75 to 100 kg per mu, or to prepare 1% urea and 3000 to 4000 times 802 mixture, each mixed with a mixture of 75 kg, spraying every 5 to 7 days, Even spray 2 or 3 times.