Potato medicine and fertilizer integration technology
"Integration of medicine and fertilizer" technology refers to an application technology that combines disease prevention agents with foliar fertilizers and sprays them at the same time in the potato disease prevention work. This technology is particularly effective for the prevention and control of potato blight. Outstanding. It has been widely used in northern my country.
Principle of use: Medicinal fertilizers do not produce acid-base reactions. Advantages: Combining disease prevention and treatment with supplementary nutrition, not only prevents diseases *********, but also has low cost of medicament, saving mechanical operation cost, and improving tuber quality It also plays an important role in improving tuber yield and starch content. Commonly used methods are to mix protective agents with calcium and magnesium borate, systemic fungicides, potassium dihydrogen phosphate and insecticides.
How to use the medicine and fertilizer integration technology:
1. First spraying: It is often difficult to determine the first spraying time during production. Spraying should be carried out on the basis of prediction and forecast according to the growth and development stage of the plant and the climate. Generally, the medicament should be sprayed in the early stage of potato budding, and early-maturing susceptible varieties are even earlier.
2. The second spraying: the potato enters the budding stage, when the early blight enters the onset stage, continue to apply 750g calcium magnesium borate fertilizer + 180g mancozeb water dispersible granules or 80g suspension per mu to promote plant growth. After the machine enters the ground, it will cause damage to the ridges and furrows in the plot. When spraying, pay attention to fixing the lanes to reduce the damage to other ridges and furrows and also reduce the spread of germs.
3. The third spraying: The potato has entered the flowering period, the plant has been fully expanded, and the potato has begun to form, which requires relatively high fertilizer and water. If the weather is dry, continue to use the protective fungicide 1000g calcium magnesium borate fertilizer per mu + 180g mancozeb water dispersible granules. In case of continuous rainy weather, late blight will be prevalent, so the type of the agent should be changed, and the agent should be changed to the systemic fungicide cymoxanil, calcium and magnesium borate 1000g+180g cymoxanil per mu.
4. The fourth spray: The potato enters the potato setting period. At this time, the potato has high requirements for water and fertilizer, and late blight has also entered the high-incidence period. Change the type of fertilizer and 50g per acre + 180g dimethomorph mancozeb. Increase the prevention and control of late blight. If there is insect damage, it can be used together with the insecticide. Test before use to see if there will be a reaction. If precipitation occurs after mixing, do not mix insecticides.
5. The fifth spraying: during the tuber swelling period, when the potato has the highest requirements for water and fertilizer, the frequency of fertilizer application should be increased, and the last blight cymoxanil 2.5kg/ha+200g should be used for the medicine. Potassium dihydrogen phosphate.
6. The sixth and seventh sprays: early-maturing potatoes are entering the mature stage, and late-maturing varieties are still in the tuber swelling stage. At this time, you can continue to spray with fertilizers to increase the survival period of the plants, prevent and control potato tuber infections The ratio is: 200g potassium dihydrogen phosphate + 200g cymoxanil + 180g enoyl manganese per mu. For the last mu, 180g dimethomorph manganese zinc + 200g potassium dihydrogen phosphate was used. Promote the aging of tuber potato skin and improve the storage resistance of tubers.
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