Summer corn seedling management five defenses

The corn is affected by high temperature and rainy weather, it is easy to appear seedlings and ridges, as well as diseases and insect pests. Therefore, the “five preventions” should be done in the seedling management of summer corn.
First, check seedlings fill the seedlings to prevent seedlings and cut off the ridge to ensure that the whole seedlings, seedlings should be checked in time to make up the seedlings, with early maturing varieties to regenerate after germination or in the seedlings 4-5 leafage before transplanting in the afternoon or cloudy soil with seedlings. When maize 3-4 leaves and time seedlings, 5-6 leaves Dingmiao, pull out weak seedlings, seedlings, diseased seedlings, round stalk seedlings, choose to keep a consistent size of the seedlings.
Second, timely cultivator grass seedlings should be 2-3 times the cultivator weeding, Dingding, the cultivator should be shallow, deep 5 cm is appropriate. Before the jointing, cultivating the grass 1-2 times, promote the deep rooting of the secondary roots, the depth of 10 cm, between the rows deep, seedlings shallow. Advocate chemical weeding, use 100-120 milliliters per acre with corn treasures or Yihe mixture, water 50 kg, evenly spray.
Third, check pests and insect pests to prevent the timely removal of Tanabe, loquat, heading weeds, eliminate aphids, fly fleas. Corn Thrips damages the heart and leaves of corn in mid-to late June, distorting the heart, causing silvery-white streaks on the victim's leaves, and severe yellowing of the dead leaves. Control methods: 40% omethoate 25-30 ml, watered 30-50 kg, or 50% phoxim EC 1000 times spray.
Fourth, chase after the eccentric fertilizer to prevent weakness and weak seedlings should take measures as soon as possible, single plant management, promote weak and strong, so that it quickly catch up with the general plant height, to prevent the late due to severe canopy closure, resulting in empty stalks or ear small, bald A lack of grain. The commonly used method is to apply eccentric fertilizer, and the effective rate of nitrogen fertilizer is 5-10 kg per mu, and the hole is applied near the plant, and the soil is loosened immediately after topdressing.
Fifth, the combination of drainage and irrigation combined with the prevention of sprouting waxy corn seedlings is characterized by drought resistance, as long as it is not severe drought, generally do not need watering, but the case should be promptly drained. In rains and torrential rains of corn seedlings, the rainwater should be drained in time to prevent heat damage to the stems and leaves and roots, causing dead seedlings, especially to the land with poor quality and quality, and timely drainage. Intertillage, scattered ventilation, to prevent buds.

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