At present, most of corn has entered a solid filling stage. Due to the high number of plants in the field, over-population of the group, and inconvenient operation in the field, it is difficult to manage in the middle and later stages and it is easy for people to neglect. However, this period is a crucial period for determining corn production. It is necessary to promote strong heads, prevent lodging, prevent and treat pests and diseases as the management objectives, and strengthen the management of cultivators, focusing on the following points: 1, water and fertilizer management. This time is the period of moisture and fertilizer absorption is also the sensitive period of moisture fertilizer, if there is a phenomenon of deferment fertilizer should be applied topdressing fertilizer such as urea, pay attention to flood control. 2, earth. In the midsummer, the convective weather increases, and attention should be paid to inspections. 3, pest control. This period is a period of high incidence of pests and diseases, insect pests mainly aphids, corn borer, armyworm. Diseases mainly include large spot, small spot, and rust. Control of locusts, can be used 50% to raise fog 8-10 grams per mu or 10% imidacloprid 10-15 grams per mu 45 kg of water spray. Prevention of corn borer mainly in the big bell mouth period, when the corn borer in the heart of the insect strain rate of 10%, with 50% phoxim EC 1 kg and 50 kg of fine sand mixed with 1% phoxim granules spread in Prevention and treatment within the heart leaves can prevent and control 500 strains per kilogram; or use 3% phoxim particles 0.5 kilograms, mixed with 7.5 kilograms of fine sand, and mix it and spread it into the heart and leaves, 1.5-2 grams per plant. Mythimna separata can be controlled by spraying with diflubenzuron or 4.5% beta-cypermethrin 1500-2000 times. For the control of large leaf spot and small spot disease, 1-2 pieces of diseased leaves on the bottom of corn can be firstly removed and destroyed, and then sprayed with 50% carbendazim or 70% thiophanate-methyl 500-fold, or 75%-mancozeb 500-800. Double spray control. Corn rust should be sprayed and prevented in the early stage of disease. The commonly used agents include 65% zeocin 500 times, 25% triadimefon WP 1500-2000 times, and 25% Triadimefon 1000-1500 times. Spray it once every 10 days or so, and control 2-3 times in a row. 4, timely interlaced or septal castration, remove empty strains. The timely deferral after pollination can promote early maturation for 2 - 3 days, and increase production by about 7%. Other Dna Analysis Instrument,Gene Analyzer For Medical Use,Fully Automatic Gene Analyzer,Fragment Analysis Equipment Nanjing Superyears Gene Technology Co., Ltd. , https://www.superyearsglobal.com
Maize maturity management points