The summer solstice has arrived, and the rainfall has gradually increased after the province entered the Meiyu period. According to the current weather conditions and the growth of corn in our province, experts have proposed such a field management proposal.
The planting situation of corn in our province is as follows: planting began in early June, and now it has been basically planted. At present, the summer maize in our province is in the stage of emergence to the 5th leaf stage. At this time, the corn is sensitive to the waterlogging, the rainfall is large, the soil If the water is too saturated, it will cause buds and seedlings, which will seriously reduce production and harvest. The current rainfall should attract the attention of farmers. Experts suggest that the Sangou should be dredged and the water should be drained from the field. When preparing for the flooding, it is recommended to adopt the ridge planting, which is more conducive to the characteristics of the waters along the Huaihe River and the south of the Huaihe River. Timely discharge of water in the field to reduce waterlogging; in addition, when discharging water, 10 kg of urea per mu should be applied in time to raise the seedlings. It is necessary to avoid fertilizing the seedlings after yellowing, or spray some humic acid leaves. Fertilizer, which promotes the growth of roots and leaves. Because there is still a part of spring corn in our province, spring corn is currently in the period of tasseling, and the rainfall may be lodging. During the tumbling period, we must lift the corn stalks in time. If there is no time to lift the corn stalks, the corn may bend and grow upwards. The corn stalk that grows upwards can no longer be lifted up, because the roots on the side of the sloping side have already occurred, and the roots of the sloping side will be broken, and the loss will be greater. Let it grow naturally. If some of the corn is before the jointing, it can be seen that before the leaves are 9 leaves, they can still recover from natural growth without any special treatment. Pest Management Maize brown spot disease Corn stem rot disease After the rain, the temperature is higher, the humidity is higher, and the fungal disease is prone to occur. Especially after the corn is dumped, it is easier to squeeze each other to cause disease. The corn growers can advance against the fallen corn. Spray a little carbendazim to prevent it. Brown spot disease occurs in corn leaves, sheaths and stalks, first at the tip of the top leaves, with the most common lesions at the junction of leaves and sheaths, often densely integrated, initially yellow-brown or reddish-brown spots, with lesions Round or elliptical to linear, the leaf tissue near the bulge is often red, and small lesions often come together. In severe cases, several or even all of the lesions are covered with lesions, and large brown on the sheath and veins. spot. If a field of brown spot disease has occurred before, use triadimefon or tebuconazole in advance for control.
In the process of corn planting, there is also stem rot, which is mainly characterized by rot of stalk near the ground, which will have rancid smell, mostly bacterial stem rot, and stem rot should be treated with agricultural streptomycin in time. For pests, mainly the damage of tigers and armyworms, it can be controlled with high-efficiency flumethrin. Stem and leaf weed control in stem and leaf weed corn field is in the period of ~5 leaf stage of corn seedlings, and weeds are also in the 2~5 leaf stage. The herbicide is basically a compounding agent of nicosulfuron and atrazine, and the effect is good. It is especially reminded that the corn field should avoid the use of organophosphorus pesticides one week before and after the use of this herbicide, otherwise herbicides are prone to occur. Drug damage. There are also herbicides such as mesotrione and oxazolone. These effects are also possible, but at a slightly higher price. The time for topdressing cornfield topdressing is mainly before the big bell mouth. The amount of fertilizer is determined according to the amount of base fertilizer. If the base fertilizer can use 80~100 kg of an acre, it is recommended to apply 30 kg of nitrogen fertilizer in the later stage (3:1:2). ) Just fine. It is not recommended to topdress too early. If the early chasing will cause the loss of fertilizer, it will easily lead to prolonged growth.
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