Current field management of wheat and rapeseed
The winter festival has just passed, and the autumn work in the province has just been over half. The wheat fields in northern Fujian have not yet been broadcast, and most of the weak spring or spring wheat along Huaihe and its southern areas have not yet been broadcast. Most of the japonica rice sown by the wheat glutinous rice has not yet been harvested, because there are more large-scale plantings, and the sowing date is relatively late. October is the filling period of late rice, but due to the continuous autumn rain, the filling or maturity of rice is hindered, and it is slow. At the same time, serious ear disease, such as bacterial wilt, ear-neck, rice false smut, The field has even reduced production by more than 50%. In addition, the long-term rainfall has caused serious grass damage and waterlogging on the already grown wheat vegetables, so it is imperative that the field management work should be carried out after the clearing. Some problems in the current live broadcast of japonica rice in our province 1. The sowing date is late. Late-maturing japonica rice must be sown early. Although japonica rice is a poorly light variety, excessive delay can lead to insufficient light, which in the end seriously affects its yield. The best choice between the Jianghuai and the middle-aged period is that the transplanting growth period should not exceed 150 days; along the Yangtze River and the south of the Yangtze River, the mid-season or late-maturing early indica rice should be selected, and the south of Chaohu Lake can be planted in late-maturing wheat. In the north of Chaohu Lake, the live broadcast of wheat bran should be selected from the middle and early maturity, and the growth period is close to 130 and 140 days. 2. According to the weather, the seeding method can be adopted flexibly. If the wheat is harvested, the weather is better, and the soil is cooler, you can take the method of sowing water. If you are a wheat, choose the field first, the three ditch will be unblocked, then put the water, mix it with Tian, ​​and finally carry out the water sowing. This is beneficial to drainage and is also beneficial to prevent the occurrence of sheath blight, and is more conducive to seasonal sowing of lower sorghum wheat and rapeseed. 3. If you are late, you need to change the variety. When broadcasting late, you should choose a variety with a shorter growth period. 4, the live broadcast of japonica rice due to the late temperature drop, the temperature of the ear is also within 20-30 degrees, such temperature is very suitable for the occurrence of panicle neck, plus humidity conditions, such as autumn rain, fog, sputum. Because the straw is now returned to the field, the source of the bacteria is everywhere. In autumn, indica rice is easy to meet the pathogenic conditions of ear-necked mites, grain mites, and branches and stalks, so it must be based on rice blast. Indica rice can not be lack of three times to fight the needle-nosed mites, to prevent rice smut; big belly to prevent rice smut, the first time with the neck scorpion; after the head, control grain mites and panicle scorpion. Bacterial wilt is divided into two types, bacterial and physiological. In the later stage, the temperature drop and rainfall will induce bacterial diseases. The root odor is bacterial, the roots are not stinky and a large piece is physiological, so it is necessary to prevent and cure the bacterial wilt. After heading, you can choose the agent to control bacterial bacterial wilt, and also treat the panicle neck sputum. After the same as the ear, you can choose the agent that can control both bacterial diseases and rice blast, such as Bi Rui (Spring Thiazole Zinc) Wait. The current field tube of rapeseed has been planted 1. Do a good job of clearing the ditch and clearing the ditch. 2. Grasp the chemical weeding work. When the rapeseed does not reach 5 or 6 leaves, the grass weeds can be removed first. If it is a general grass weed, choose high-efficiency grass cover; if you are looking at resistant weeds such as Mai Niang, Niu Niang, Hard Grass, etc., choose chlorfenone or pyranone, such as 24%. Broad. If there are broadleaf weeds such as rice leeks, big nests, and peas in rape fields, they can be mixed with grass weed herbicides in advance, and you can choose clopyralid for control;缕, etc., you must wait until 5 or 6 leaves and then use the herbicide to prevent it. 3. Do a good job in chemical regulation in a timely manner. When the cold weather is strong, the rapeseed is easy to be frozen. Therefore, after clearing, chemical control should be carried out while chemical weeding is carried out to make the leaves of rapeseed seedlings thicker, the palisade tissue thickened, and the cold and frost resistance enhanced. It prevents it from freezing damage during cold weather. 15% paclobutrazol or 5% uniconazole per acre of field, 40-50 grams per acre of field spray. 4, when the sensation is good, we must seize the remaining seedlings to fill the gap. The current field tube of wheat has been planted 1. Drain the ditch and reduce the humidity in the field. 2. For the field where the seedlings are found without seed dressing, it is necessary to prevent disease in time; if the yellowing is caused by insufficient long-term illumination, it must be given with endogenous hormone regulator plus high-quality foliar fertilizer. Spray it, such as Yuduo potassium, alizarin lactone, Huilongbao, Zhuangfuxing; some fields have appeared in wheat spiders, and should be promptly controlled. 3. Do a good job in chemical weeding in a timely manner. This year, the weeds are well-proportioned and grow fast. When the wheat reaches 3 leaves, the weeding work before winter is carried out under good weather conditions. 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