At present, all parts of the country have entered the autumn harvest season. After harvesting the autumn crops, they will immediately be broadcast in autumn. In many places, the crops that are planted in autumn are wheat. What kind of work should wheat pay attention to during autumn sowing? Matters, it is recommended that all farmers and friends should take a look at it and wait until it is available.
Do a good job in seed treatment
Affected by traditional farming methods, farmers in many places are still accustomed to the "white seed" of wheat. This habit really needs to be changed. After all, the current soil environment, the occurrence of pests and diseases, etc. are very different. . Before sowing, the wheat seeds should be coated or medicinal dressing, which is very useful for controlling underground pests and preventing winter wheat seed transmission and soil-borne diseases. Powdery mildew, leaf rust, wheat spiders and gray fly in autumn wheat seedling stage The prevention and control of alfalfa is also very effective, and it is also a key measure to ensure the whole seedlings and strong seedlings of wheat. Therefore, wheat must be harvested from planting if it is to be productive.
Formulated insecticide and fungicide formulations:
1. Select imidacloprid, flomolyl nitrile, difenoconazole, and seed coating agent (100 kg seed dosage: 130-180 g active ingredient) for seed coating to control root rot, sheath blight and aphids .
2, the total eclipse often occurs in the area, the use of difenoconazole suspension seed coating agent (100 kg of seed dosage 16-18 grams) coating or silthiafen suspension seed dressing (100 kg seed dosage 30-40 Gram) seed dressing. When coating and seed dressing, use the medicine according to the pesticide label instructions.
3, 30.8% imidacloprid + 1.1% tebuconazole suspension seed coating agent, 6 ml per kg of seed;
4, 600 g / liter of imidacloprid suspension seed coating compound 60 grams / liter of tebuconazole suspension seed coating agent, the amount of seed per kilogram is 4.8 grams, 0.5 grams;
5, thiamethoxam 70% seed treatment dispersible granules compounded 60 g / liter of tebuconazole suspension seed coating agent, the amount of seed coating agent per kg of seed is 4 grams, 0.5 grams;
6. 50% phoxim emulsifiable concentrate can be used for seed dressing insecticide. 50% carbendazim WP can be used as bactericide, 0.2% seed dressing according to seed amount, insecticide and fungicide can be mixed with liquid seed dressing. , piled up for 4 to 6 hours, dried and sown. Phosphorus seed dressing should be protected from light.
For wheat fields that do not use the pest and disease treatment seed coating agent, the tebuconazole suspension seed coating agent can be used to control diseases such as sheath blight of wheat seedling stage. 50% diazinon emulsifiable concentrate can be used to control underground pests.
Reminder: Autumn sowing wheat can be based on the disease resistance, disease incidence, climatic conditions, cultivation methods of wheat varieties, and then rational selection of pharmaceutical agents. To ensure that the dosage is strict, it must not be used excessively. It is usually planted immediately after seed dressing. It is now ready for use. It is broadcasted on the same day, and the amount of seeds used after seed dressing is appropriately increased.
Seedling stage pest control
Weeding time: The weeds in the autumn wheat field are small and the resistance is poor. This is a good time for chemical weeding. Spraying wheat herbicides should pay attention to the time, usually from mid-November to early December (the average daily temperature is above 10 °C), wheat 3-4 leaf stage, weed 2 leaves 1 heart to 3 leaf stage.
Drug selection: use acetylene ester (3-4.5 g / mu), benzenesulfuron (1-1.5 g / mu) or methyl disulfuron (0.6-1 g / acre) with water 25 kg spray, to prevent miscellaneous wheat grass. For the wheat field mainly based on the weeds, such as sage, leeks and other weeds, 10 g of phenylsulfuron-methyl WP or 1 g of benzenesulfuron-methyl suspension can be used for prevention and control. The grass-based wheat field can be treated with 70% fluzolsulfonate water dispersing granules per acre.
How much is the wheat base fertilizer?
High-yield fields use nitrogen fertilizer transfer technology, nitrogen fertilizer bottom application and topdressing each account for 50%, and all other fertilizers are applied. According to scientific experiments and practical experience, the appropriate fertilization rates for different soil fertility levels are as follows:
1. 200-300 kg per mu, 6-10 kg of pure nitrogen (N), 3-5 kg ​​of phosphorus (P2O5), 2-4 kg of potassium (K2O), and all nitrogen, phosphorus and potassium fertilizers.
2, per mu yield 300-400 kg, apply pure nitrogen (N) 10-12 kg per acre, phosphorus (P2O5) 4-6 kg, potassium (K2O) 4-6 kg, 70% of nitrogen fertilizer, 30% get up Period of application, phosphorus and potassium fertilizers are all applied.
3, per mu yield 400-500 kg, apply pure nitrogen (N) 12-14 kg per acre, phosphorus (P2O5) 6-7 kg, potassium (K2O) 5-6 kg, nitrogen fertilizer 60% bottom application, 40% rise period Or the jointing stage, the phosphorus and potassium fertilizers are all applied.
4, per mu yield 500-600 kg, apply pure nitrogen (N) 14-16 kg per mu, 7-8 kg of phosphorus (P2O5), 6-8 kg of potassium (K2O), 50% of nitrogen fertilizer, 50% jointing stage After the application, the phosphorus and potassium fertilizers are all applied.
The above is about the introduction of wheat autumn sowing. In fact, no matter what crops are planted, it is necessary to do a good job in controlling pests and diseases and the amount of base fertilizer used. These matters can ensure high yield and high quality of wheat.
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