This year's sensation is full and the seedlings are complex and have both advantages and disadvantages. It is very important to guide the scientific management of farmers. According to the research situation, the following suggestions are proposed:
1. It is suitable for repression, breaking the soil compact and sealing cracks. Before the first rain, the wheat field with a large amount of rainfall was sown, and the surface of the soil appeared cracked and cracked. If the compaction is not removed in time, poor soil permeability will affect the normal growth and development of wheat. It is also extremely unfavorable for the formation of strong seedlings before winter and the safe wintering of wheat. The time and time for repression should be good. The soil moisture should be suitable and it should not be too wet. It is advisable to crack down on sunny days. After the rain, the wheat fields with poor seed quality and more dust are planted. For the wheat fields sown after precipitation, a strong repression should be carried out during the wheat tillering period. According to the current situation of the flood conditions, the wheat fields in the south-central region before the winter can not be frozen and sealed.
2. This year, due to the good soil moisture, the characteristics of weeds are as early as possible, the second is heavy, and the third is complicated. Failure to timely prevent and control different types of weeds will have a greater impact on wheat production. We must attach great importance to this and do a good job in propaganda and launching efforts to prevent and control all kinds of weeds after the wheat trifoliate season. According to the investigation, the density of some broad-leaved weeds such as wheat, bromegrass, etc., S. sophia, Amaranthus, and Polyporus umbellatus is relatively high. It is suggested that all regions should do a good job in preventing and controlling large areas on the basis of monitoring and census.
Due to the large span of the province's winter wheat region, the climatic conditions, the phenological period, and the types of wheat varieties and weeds are not all the same. In the prevention and control technology, we must adhere to the principles of local conditions and classification guidance.
For amygdalin, methylsulfuron (Sema) may be used; for barley, use may be made of furazolidone (tiger tiger), imidazolam (preferred) or metsulfuron (Sma); For the aphrodisiac, wild oats, can be used fine fazoloxacin (Puma), clodinafop acid (Mega) and so on.
For hard wheat fields, all herbicides that control grass weeds must undergo safety tests to ensure safety before application.
For the broad-leaved weeds that are mainly unearthed before the winter or unearthed before the winter, the isooctyl fluconoacetate and flufenoxazone (Calavern) may be used. Fluroxypyr, 2,4-D isooctyl ester, etc.
For land masses where grass weeds and broad-leaved weeds are mixed, if the control period is the same or overlaps, a compound formulation of the above agents, or a compound formulation that has undergone tests and demonstration tests may be used.
Because the use of weeds for pre-winter control is susceptible to adverse weather conditions such as rapid cooling, strong winds, and snowfall, the medication time can be appropriately advanced. Where conditions permit, we must give full play to the role of large-scale plant protection machinery and improve the level of mechanization in the chemical treatment of weeds in wheat fields.
3. There are more rainy days this year, lack of light, high soil moisture, and a high degree of concern for the occurrence of disease at the seedling stage. Http://Content/21a46875-4498-4cd6-8f29-1a337e7a3f13?cType=2
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