First, the seedlings Dingmiao
Three to five days after the emergence of sesame seeds, the first time the first pair of opposite leaves (peasants call it the "cross") was planted for the first time. When the second and third pairs of true leaves appear in the sesame seedlings, the second time the seedlings are made. At this time, the weak seedlings are required to retain the strong seedlings and the seedlings are tentatively set. In order to prevent the occurrence of pests and mechanical damage in the process of seedling thinning, it is advisable to divide the seedlings and the seedlings in three times, namely, one sparse, two and three seedlings. The method is: rare and dense, thin and dense, not rare and strong seedlings. To stay evenly and stay thick, leave no two plantlets.
Second, cultivator soil
The farmer said: "The first three catches of sesame flower." When the first and second pairs of true leaves of sesame appear, the first cultivator is carried out, but the top soil is suitable for the top soil. When the third pair of true leaves is present, the second cultivator is carried out. This time, deep ploughing can be performed. 6 cm is the second catch; when there is a fourth to fifth pair of true leaves, a third cultivator is used to cultivate the soil. At this time, the cultivator can reach a depth of about 8 cm for the third catch. The second and third cultivating soil can play the role of weeding and rooting, which is conducive to the growth of roots, preventing waterlogging, and reducing the occurrence of diseases. It is also conducive to inhibiting the growth of weeds and preventing lodging.
Third, scientific water
Sesame is extremely sensitive to the demand for water, can not be a long time drought and can not water. The water requirement of sesame seedlings is relatively small. If the sensation during sowing is good, it can meet the water requirement of the plants. Watering is not required. However, it is very sensitive to the requirement of water when it enters the flowering stage. At this time, it is not only afraid of waterlogging, but also afraid of drought. We must pay attention to watering in case of drought and timely drainage in case of waterlogging. The amount of water required for the period of capping is gradually reduced. If the humidity during the flowering and wetting seasons remains relatively good, then watering is generally not required.
Four, outside the top dressing
In the early flowering period of sesame, it is necessary to have a large amount of fertilizer. In order to prevent the lack of fertilizer at this time, it is most suitable to apply the available nitrogen fertilizer before the early flowering period. In the flowering stage of budding, the demand for phosphorus and potassium in sesame increased significantly, but it is more appropriate to apply topdressing at this time, and use 0.25 kg of potassium dihydrogen phosphate to spray 100 kg of water, every 3 to 5 days thereafter. Spray 1 time, spray 3 to 5 times continuously.
V. Prevention of pests and diseases
Diseases of sesame mainly include stem blight, bacterial wilt, blight, blight, and fungal keratoses. Control methods: 1 row antimony antifouling; 2 rational rotation dumping; 3 selection of disease-resistant varieties; 4 chemical control, such as with 50% thiophanate 2000 times or 1:1: 300 Bordeaux spray root treatment and other methods. Insects include ground tigers, aphids, sesame moths, blind stink bugs, cockroaches, and so on. Each mu uses 80% of the dichlorvos emulsion 100 ml spray control 75 kg of water.
Six, timely harvest
15 to 25 days after the final flowering period of sesame can mature. Its characteristic is that the stems and leaves and the fruit turn from blue to yellow, and the fallen leaves reach 70% to 80%. At the same time, there are still a small amount of pods showing fruit cracking, which can be harvested at this time. After the harvest, it is sun-dried, threshed, processed and finally stored.
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