Summer Corn Ear Stage Management Methods and Technical Key Points
How should summer corn be managed during the ear stage? Please explain the methods. Summer corn ear stage management can refer to the following methods: 1. Remove weak plants and cultivate to promote roots. For those small plants, weak plants and ineffective plants, they should be removed early. During the ear stage, generally cultivate 1-2 times. After the small trumpet stage, cultivation should be shallow, to protect roots and conserve soil moisture; ...
How should summer corn be managed during the ear stage? Please explain the methods.
Summer corn ear stage management can refer to the following methods:
1. Remove weak plants and cultivate to promote roots. For those small plants, weak plants and ineffective plants, they should be removed early. During the ear stage, generally cultivate 1-2 times. After the small trumpet stage, cultivation should be shallow, to protect roots and conserve soil moisture;
2. Apply ear fertilizer heavily. The topdressing time is generally best at the large trumpet stage. The fertilization method is: combined with intertillage and earthing up, between two plants 15-20 cm from the corn row, dig deep holes 6-10 cm deep and 3-4 cm in diameter, apply nitrogen fertilizer 40 kg/mu, put the fertilizer into the holes, then earth up heavily;
3. Watering and drainage/irrigation. During the corn ear stage, 2 waterings should be done well: the 1st around the large trumpet stage, which should be irrigated together with topdressing. The 2nd around tasseling, generally with a larger irrigation amount. If rainfall is excessive and soil moisture is too high, drain in time to prevent waterlogging;
4. Timely control of diseases, insect pests, and weeds. The main diseases at the summer corn ear stage include northern leaf blight, southern leaf blight, rust, etc. To control northern leaf blight and southern leaf blight, in the early stage of disease, spray with fungicides such as 10% Shigao, 50% iprodione, or 70% mancozeb, at an interval of 7 days, continuously applying 2-3 times. To control brown spot and rust, in the early stage of disease, spray with 25% triadimefon wettable powder 1000-1500 times solution or 50% carbendazim 500 times solution, at an interval of 5-7 days, continuously applying 2-3 times. At the peak spore period, spray with 97% disodium edetate? no, with 97% dinocap? The source says, use 97% sodium dinitro-o-cresolate? Actually keep as original: 97% original solution 250-300 times or 50% thiram wettable powder 800 times solution, once every 7 days, continuously applying 2-3 times. At the jointing stage and around tasseling, spraying 10% Shuangxiaoling 200 times solution can effectively control corn stalk rot. The main insect pests of summer corn are corn borer, aphids, and red spiders. To control corn borer, at the small trumpet stage and large trumpet stage, use 1.5% phoxim granules 0.5 kg mixed with fine sand 7 kg per mu, mix evenly and sprinkle into the leaf whorl, with 1.5-2 grams per plant. It can also be used with 90% crystalline trichlorfon 1500-2000 times solution; or 75% phoxim emulsifiable concentrate 3000-4000 times solution poured into the whorl or applied at the top of the ear, with 10 ml per plant. To control aphids, spray with 40% omethoate emulsifiable concentrate 1500 times solution, or 10% imidacloprid wettable powder 1000 times solution, or 50% pirimicarb wettable powder 2000 times solution, or 10% beta-cypermethrin emulsifiable concentrate 1500 times solution, etc. To control red spiders, spray with abamectin (1.8% insect mite ke, 1.8 Aifule, 0.9% qimansu) 2000-3000 times solution, or 20% tetradifon? The source says, use 20% 2000-3000 times solution, or 10% liuyangmycin 1500 times solution for control. In the middle and late stages of corn growth, 20% paraquat aqueous solution can be used for directed spraying to kill weeds.
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