1 Prevent premature senescence of plants. During corn filling, all the nutrients produced by impeller and absorbed by root system were used for the growth of corn seeds. The reproductive growth of maize reached its peak, the vegetative growth basically stopped, and the ability of roots to absorb nutrients and the ability of leaves to produce photosynthetic substances gradually declined. The longer the leaves survive, the more photosynthetic substances are produced, the fuller the corn seeds are, and the higher the yield is.
Corn filling needs a lot of water, and the soil layer is not suitable for drought. It often rains in some areas, so there is no water shortage, so don't worry about water shortage. In some areas, long-term lack of rain often leads to insufficient soil water content, and the drought of corn will affect the normal filling of corn at this time, so irrigation is best. When the water content is appropriate, it is best to spray 0.5% potassium dihydrogen phosphate solution+1% urea aqueous solution +3000 times brassinolide to fill the fertilizer position to prevent premature senescence of corn.
The key to control pests and diseases as soon as possible is to take reproductive growth as the leading factor. Almost all nutrients are transported to the grain, so the ability to resist pests and diseases is not as strong as in the previous period. In addition, corn plants are tall and big, and the leaves in the field cross each other to block the sun, which also leads to the decrease of ventilation transparency in the field. At this time, there will be opportunities for pests and diseases, and brown spot and rust of corn are more likely to occur.
Under the influence of plant diseases and insect pests, leaves are prematurely aged and cannot normally produce sufficient photosynthetic nutrition. However, the nutrients needed for grain growth are only transported from leaves and plants, which leads to premature aging of corn, vicious circle and poor growth of corn seeds. Spraying spirodiclofen 1000 times solution+pyrazole prochloraz 1000 times solution+indoxacarb 800 times solution +0.5% potassium phosphite on maize leaves two weeks after flowering has the functions of preventing and controlling pests, supplementing trace elements and resisting premature aging.
3 what should I do if the corn lodging? After the corn entered the filling stage, although it was in the second half, it was very common to be exposed to heavy wind and rain at this time. It is better to prevent seedlings from falling in the early stage, and the corn seedlings are lighter. If you don't spray dwarfing control agent at the beginning, it will happen in the future when you encounter strong winds and heavy rains. If it is only rooted, it can be immediately supported after rain to improve ventilation capacity. It will happen if it is broken.
4. Harvesting corn with mature stalks at a proper time can prolong the harvest time of corn as much as possible without affecting the planting of the next crop, which can make the corn well grouted and full of seeds, thus improving the overall yield of corn.