Experts produce recipes for the Southwest Corn District

In order to keep abreast of the corn production situation, provide scientific guidance for the high yield of corn in 2007, and the chief experts of corn science and technology in Sichuan, Hunan and Yunnan provinces, and implement county-related personnel, conducted surveys on corn production in three provinces and made the following recommendations:
First, do a good job of corn fertilizer and water management, and implement hierarchical management. Due to the earlier sowing of maize and the prolonged sowing of sowing date this year, the difference in the growth period of the corn in different fields and regions is quite different. Different management measures should be implemented for corn of different fertility processes to promote the increase of maize yield.
The specific measure is: For early spring corn (which has entered the grain filling stage), grain fertilizer should be increased to increase grain weight. Spray 800-1000 times more potassium dihydrogen phosphate to promote early maturity and increase grain weight; there is a field of defertilizer, it can also use urea 0.5 kg, 100 kg of water, foliar fertilizer, enhance photosynthesis, promote Increase production. For late spring corn (into the jointing, booting stage), the focus is to chase early recovery fertilizer, assisted pollination. At this time, farmyard manure should be suitable for quick-acting nitrogen fertilizer, fertilizer and water to meet the needs of ear and water differentiation. The average mu of urea is 17-20 kg (50% of the total amount of fertilizer), 100 kg of farmyard manure and 1000 kg of water. After the male threading, just in the rainy season, artificially assisted pollination should be carried out in time to reduce bald spots and lack of grain, promote full grain, increase yield and quality, and increase production by about 5% to 10%.
The second is to do a good job of anti-drought and flood prevention in the later period.
After entering the summer, the southwestern region has entered a period of concentrated rainfall, and local governments should pay attention to flood prevention work. After rainy days, drainage should be drained in time to prevent flooding and other measures should be taken, and soil should be loosened to improve soil permeability. After the flood disaster occurs, timely cultivating and topdressing of available nitrogen fertilizers should be carried out to promote seedling growth. At the same time, this period is also a summer and drought-prone period. Local governments should also pay attention to drought protection and prevent production losses.
The third is to prevent and control pests and diseases. As winter temperatures are significantly higher, which is conducive to the wintering of pathogens and eggs, it is expected that the main diseases and pests of corn in the southwestern region this year will be mainly corn borer, aphids, leaf spot, sheath blight and stalk rot. The general trend is that insects are more important than diseases, and soil-borne diseases are more important than leaf spot diseases. All localities should strengthen the prevention and control of pests and diseases.
In order to protect the ecological environment and food safety. Several highly effective and low toxic chemical pesticides and biological agents are now recommended. 50% Ruijinte emulsion control corn borer, 30 ml mu, 2 kg fine sand, snacks. Beauveria bassiana powder control corn borer, 20 grams of mu, 2 kg of fine sand, snacks. Insect double granules, 1000 grams of mu, snacks. Amy Le 70% water dispersible granules to control aphids, mu 1.4-1.9 grams, spray 50 kg of water.

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