On the basis of applying basal fertilizer, topdressing nitrogen fertilizer should also be applied at the beginning of sesame. For summer sesame seeds that are less likely to be planted than those used for sowing, they must be topdressed early. The sesame needs more potassium, and 0.4% of potassium dihydrogen phosphate solution can be used for foliar spraying at the beginning of flowering stage, and generally it is sprayed once every 5 to 7 days. ?
Second, timely watering
Under the condition of good soil moisture at the end of the seedling stage, watering is generally not required during the seedling stage; water shortage can occur before bud emergence; watering and podling stage is the critical period for sesame water requirement; if this period encounters drought, water is needed; sesame Generally no watering is required after capping.
Third, artificial topping
Temporary topping of sesame seeds can promote the concentrated distribution of water and nutrients to the already formed pods and grains, which is conducive to early maturation and yield increase. Appropriate topping time: spring sowing sesame in the middle and late July, summer sowing sesame in the middle and late August. It is generally topping when the pods in the lower part of the plant are nearly mature and the upper part is still flowering (inflorescence no longer increases). To choose the sunny day to do the top. When topping, remove the top 2 to 3 cm of the inflorescence by hand. ?
Fourth, disease prevention and pest control
The diseases that damage sesame are mainly stem blight, leaf wilt, and blight, which mostly occur in flowering and podging period. Specific prevention and control methods: In addition to avoiding heavy tiller planting and sowing with 15 minutes of warm water at 55Â°C or 5.7% copper sulphate for 15-30 minutes, the field where the disease has occurred may be treated with 40% carbendazim 500-800 times per acre. Spray, spray once every 5 to 7 days, even spray 3 to 4 times.
Sesame seedlings and flowers are vulnerable to ground tigers, aphids, and spider mites, and they can be used to control the ground tigers by means of bait baits, and to control aphids and red spiders using systemic pesticides.
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