The rise in temperature is a good time for the management of spring fertilizer and water and for the first time in the wheat field. Xiaoyan Shi, technical advisor of Tang County, Hebei Province, came to his own demonstration village of science and technology to convene demonstration households to the wheat fields to view the occurrence of wheat seedlings, growth and the occurrence and severity of field diseases and weeds, and trained on the recognition of symptoms of some diseases. Targeted prevention and control recommendations:
1. According to the classification of the seedlings, the scientific operation of the spring is a fertilizer. According to the characteristics of sowing late this year, small groups, and poor seedlings, the first time the spring water and fertilizer management should be promoted, and early management should be implemented. Early management should be promoted as early as possible to strive for spring tillering. For the main wheat field with 2-3 individual tillers and 400-600,000 mu total stems, it should be carried out during the period of getting up; For the wheat field with total mussels below 400,000, avoid blindly early tubes and should be in new roots. When a new plant is grown, it should be carried out at the beginning of jointing at the end of the jointing process. At the same time, according to the fertility, the amount of base fertilizer, scientifically determine the amount of nitrogen fertilizer applied in spring. Generally with the watering mus urea 15-20 kg (or 50-60 kg of ammonium bicarbonate).
2. Do a good job of comprehensive prevention and control of pests and diseases in wheat fields. Before the jointing of wheat, we should combine spring and water for wheat field chemical weeding (such as: wheat grass, leeks, sowing wormwood, etc.) and seedling pests and diseases (such as: root rot, sheath blight, early wheat aphids, wheat spiders, wheat Leaf bees, etc.) A spray comprehensive defense. You can use 10% phytonthrene 10-15 grams plus 12.5% ​​wolfberry fruit 2500 times (or 50% carbendazim 800 times, 70% ketamine 800 times) plus 50% Dimethoate 800 times (or 40% phoxim 600 times), evenly sprayed wheat ridges throughout the field. In addition, individual demonstration households found gramineous weeds in wheat fields (eg, aegilops corn, brome, wild oats, etc.), and they can add 6.9% of humming oil to 50 ml per mu and 3% of Shima (methylsulfuron). ) EC, mu 25-30 ml.
3. Do a good job of springtime control. Since most of the demonstration households are planted with Shihzu 02-1, and the management of fertilizer and water is early, it may cause some wheat fields to be overlarge. For this purpose, 30-40 grams of paclobutrazol and 40 kg of water are used for foliar spraying. To drop plant height, anti-loft effect.
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