Management of planting Maize during the Big trumpet period

The big trumpet mouth stage is the key period for the growth and development of maize, in which the reproductive growth and vegetative growth are exuberant. At the same time, this stage is also a period of high incidence of corn diseases and insect pests. In this period, the field management should highlight the "five precautions":

The main results are as follows: 1. The big trumpet mouth period of preventing de-fertilization is the peak period of fertilizer demand to prevent nutrition from falling behind. Universal fertilization should be applied according to soil fertility and seedling conditions. 30-35 kg urea per mu should be used to dig deep pits and cover the soil after fertilization. If the growth is good, it should be applied less or postponed properly; on the contrary, it should be applied more or in advance; if the growth is too poor, it should be fertilized outside the root 2-3 times with potassium dihydrogen phosphate or 120-150 grams of highly concentrated humic acid liquid fertilizer per mu and sprayed every 5-7 days.

2. During this period, 2-3 times of intermediate ploughing should be carried out to prevent lodging, and the total height of soil cultivation is 8-10 cm. Spraying 30 ml of corn or Vitamin plus 30-40 kg of water per mu can reduce the plant height and ear height of corn by 15% and 20%, not only prevent lodging but also increase corn yield by more than 15%. It is required to spray evenly on the leaf surface without heavy spray or leakage spray, and reduce the amount of re-spray in case of rain within 8 hours after spraying.

3. In the period of preventing multi-tillering and big trumpet mouth, maize grows vigorously, and tillering often occurs, resulting in nutrient loss, which should be removed in time to promote the high yield of maize.

4. The main diseases of disease and pest control corn in the middle and later stage are big and small spot, top rot and bacterial wilt, which should be prevented early. Generally advanced to the big horn mouth period of prevention and control, per mu with 70% mancozeb 150 grams, 50% carbendazim 200 grams, 75% chlorothalonil 100 grams mixed control. The main pests are corn borer, armyworm and cotton bollworm, which are watered with phoxim and omethoate 150 grams, or sprinkled with 1.5-2 kg of phorate granules.

5. Prevent drought and water in time in case of drought. Watering can also reduce the field temperature, which is beneficial to corn flowering and pollination and prevent bald tip. In order to achieve the high yield and high efficiency of corn.