Summer Maize Seedling Management: "Five Preventions"
First, check seedlings to fill seedlings, seedlings to prevent shortage of seedlings in order to ensure that the whole seedlings, seedlings should be promptly check the seedlings, with early maturing varieties of germination after reseeding or in the seedlings before 4 to 5 leaf age, transplanting in the afternoon or cloudy soil with seedlings . Maize 3 to 4 leaves when and time seedlings, 5 to 6 leaves Dingmiao, pull out weak seedlings, seedlings, diseased seedlings, round stalk seedlings, choose to stay the same size of Jianmiao. Second, timely cultivator, to prevent grassland seedlings should be cultivating weeding 2 ~ 3 times, before the Dingmiao, cultivator should be shallow, deep 5 cm is appropriate. Before the jointing, cultivating the grass 1 or 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 hectares per 1/15 hectares of corn treasure or Yihe mixture, and mix with 50 kg of water and evenly spray. Third, check pests, insect pests, pests and diseases in a timely manner to remove the fields, grasshoppers, heading weeds, eradicate locusts, 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 eccentric fertilizer, to prevent bullying on weak seedlings should take measures as soon as possible, single plant management, promote weak and strong, so that it quickly catch up with the height of the general plant, prevent late due to severe canopy closure, resulting in empty stalk or ear small, Alopecia lack of grain. The commonly used method is to apply eccentric fertilizer, and apply 1–15 hectares of quick-effect nitrogen fertilizer to 5–10 kg. The hole is applied near the plant and the soil is loosened immediately after top dressing. Fifth, the combination of drainage and irrigation to prevent sprouting corn seedlings significantly characterized by drought tolerance, as long as it is not a serious drought, generally do not need watering, but the case should be timely drainage. There are more rainstorms and intensive rains during maize seedlings. The rain should be drained in time after rain to prevent heat damage to the stems and leaves and roots, resulting in dead seedlings, especially for plots with poor quality and quality, and timely drainage and timely cultivating. , Sanhe ventilation, to prevent buds.