Now, Zhaoxian summer corn has been plucked into the flowering stage. We should seize the favorable opportunity to do a good job in the field management of corn in the late stage to ensure a good harvest of summer corn.
1. Pour the grout water. The rainy season in the late stage of corn growth has basically passed. If drought directly affects corn grouting, we must overcome the paralysis thought of relying on the rain. Grouting water is carried out in the middle of grain filling, and its main function is to promote grain filling and increase grain weight.
2, supplement application of granular fertilizer, granular fertilizer is generally applied during the tasseling to the silking stage, mainly based on nitrogen fertilizer, about 10 kg of urea per acre, can promote the grain filling, improve the seed setting rate and grain weight.
3, remove field weeds and weak strains
With the popularization of mechanized harvesting of wheat, the occlusion of wheat straw and wheat bran reduces the control effect of herbicides, and the weeds left in the wheat field also increase the difficulty of weeding. For the chemical weeding effect is not good, the land weeds in the field, we must grasp the cultivating and weeding. Combined with weeding and removal of corn diseased plants, small plants, weak plants, hybrid plants and tillers, it is necessary to properly remove the seedlings and maintain a reasonable and reasonable population structure in the field. In corn fields, there are always a certain number of plants that form empty stalks or low-small plants with inconsistent ears. They not only consume nutrients in vain, but also affect the photosynthesis of other plants. For such plants, it must be removed to concentrate the limited nutrients to normal plants.
4, timely soiling to prevent lodging
Because of the windy autumn, it often causes corn to fall. Therefore, it is necessary to cultivate the soil in time after the corn is topdressed to prevent the occurrence of lodging. If the lodging occurs during the growing season of corn, it will seriously affect the formation of yield, which can cause serious harvest. Soil cultivation can increase the formation of corn roots and enhance the lodging resistance of corn.
5. Prevention and control of pests and diseases. The prevention and control of summer corn pests and diseases should adopt the principle of "prevention first, comprehensive prevention". The main disease in the late growth stage of summer maize is brown spot disease, and the insect pests are corn borer, red spider and aphid. Brown spot disease can be sprayed with 20% triadimefon 3000 times solution, 50% carbendazim 500-800 times solution or 70% methyl thiophanate 800-1000 times before or at the onset of the disease, and sprayed once every 7-10 days. Spray 2-3 times in a row. For the control of corn borer, when the rate of common insect strain reaches 10%, use phoxim or 1605 0.5 kg plus water 10 kg, mix 25 kg of sieve ash, make granules, and put into the corn bell mouth. The control of red spiders and aphids can be controlled by spraying with 10% imidacloprid 1500 times.
6, suitable for late harvest
The promotion of suitable late harvest technology can ensure that corn has sufficient grouting time, which is an effective measure to increase grain weight and increase production and income. Strive to postpone the harvest until the end of September and early October. The standard of corn maturity is that the leaves and leaves are white, dry and loose, the milk line disappears, and the grain is shiny. At this time, the grain weight is the highest. This technology does not need to increase any cost input, and The glutinous wheat will not affect it. The test proves that for every 1 day postponed harvest, the 1000-grain weight is increased by an average of 3 g. The technology does not increase any input, but the effect of increasing production is obvious.
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