After rice transplanting, how can the sage that has been unearthed disappeared? First, after the greening, the medicinal agent is closed and the grass is not closed, and the stem and leaf spray treatment is carried out.
1 How to close the grass after the greening
The application time must be accurate: it can only be applied after it has completely returned to the green. There are two indicators for complete rejuvenation. One is to issue 9 new roots, the root length is about 5 cm, and the second is that the fourth leaf is about 8 cm long.
After the rice has completely returned to green, the sage is below the water surface, and the sooner it is applied, the better.
In short, the best time to apply the medicine, the seedlings are completely green, the grass is the height below the water surface, the sooner the better.
The formula should be suitable:
Formulation 1: pretilachlor (1,000 g) + benzopyrene or benzidine (1,600 to 2,000 g) + piracetam (750 g) / hectare
Formulation 2: pretilachlor (1,000 g) + benzopyrene or benzyl bromide (1,600 + 2,000 g) + sodium sulfonate (1,800 g) / hectare
The amount of heavy weeds is high, and the amount of poisonous weeds is low, mixed with fertilizer or soil.
Matters needing attention: the application must be uniform, strictly according to the map of the land, calculate the standard dosage; wind can not apply the drug; the water layer is about 5 cm when applying, can not flood the rice core; when applying, should be biological fertilizer, nai Butyric acid and a diffusing agent are brought in at the same time. Some of the better biological fertilizers are live dragons, earthen music, ear insurance, and so on.
2 Spray treatment of stem and leaf after seedling
For the big sages that are not enclosed and in the Gaogang area, they can be sprayed with the medicinal stems and leaves. The ideal medicines include Sweep, Pai Dan, and Dimethyl.
More pesticide knowledge , please pay attention to China Pesticide Network
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