Sesame seeds are used to chase weeds. How to deal with weeds before sesame seeds

Study on the Effect of Sesame Stalk Returning to the Field to Control Rice Diseases, Insects, Weeds and Improve Soil Fertility Li Weilian, Luo Xinglu (Department of Agronomy, Guangxi Agricultural University, Nanning 530005) Abstract The experimental results of 1991 and 1992 showed that the damage of diseases, insects and weeds in late rice was significantly reduced, the rice yield increased by 17 09 30 34, and the soil fertility of rice field was also improved. It provides a new way for the biological control of rice diseases, insects and weeds. Keywords: sesame stalk; returning to the field; Rice; Disease; Pest; Weed; Soil fertility; CLC Number: S435 11;S142 9 Regarding the allopathic effects of plants, some people at home and abroad have studied 1,2,3.

In 1988 and 1989, the author found that sesame had a significant inhibitory effect on the growth of many weeds, especially cypelaceae weeds such as cyperusrotunduslinn, and sesame stalk extract had a toxic killing effect on whitmanialaevis.2 Whether the use of sesame straw returning to the field has a control effect on rice diseases, insects and weeds, and whether it has an impact on the growth and development of rice and the soil fertility of rice field, which is a question worthy of study. 1. Materials and Methods: This experiment was carried out in the experimental field of the teaching experimental farm and the tillage room of Guangxi Agricultural University.

The soil fertility of the experimental plot was moderate, with organic matter content of 2 70, total nitrogen 0 27, total phosphorus 0 11, total potassium 0 37, and alkali hydrolyzable nitrogen 289 5

Sesame seeds have an allelopathic effect on weeds. If you don't know what allelopathy is, please "allelopathy".

1. Pre-sowing soil treatment: fluoralin is mainly used, which can control annual grass weeds and some broad-leaved weeds. In times of drought, it is necessary to suppress moisture conservation.

In the spring sesame producing areas with low temperature and aridity, the residual effect period of fluoralin is long after being applied to the soil, so it is not suitable for planting sensitive crops such as millet and sorghum in the next crop.

2. Soil treatment before seedlings after sowing. The herbicides that can be used are dichlor, lasso, dol, and chloricidan. How to use it is as described above.

12 days after the emergence of seedlings, 40 ml of mulberry can be used to cover the grass, and 40 liters of water can be sprayed.

The use of dichlor can control and remove horsetail, ox tendon grass, dogtail grass, goldenrod, wild oats, and other grasses and broad-leaved weeds such as chickweed, amaranth, and endive.

The use of Doier can control annual grass weeds and broad-leaved weeds such as amaranth, purslane, etc., and has poor control effect on spicy knotweed and iron amaranth. After sowing, before seedlings, use 72% dol liters of mu, 50 liters of water, and evenly spray the soil surface.

The use of Dua mixture, which is a mixture of Doil and atrazine, can control the sum of the herbicidal spectrum of the two herbicides. The dosage per mu is 50% 100 ml of Dua mixture.

Soil sealing treatment was carried out with herbacetan and other medicines. With 110-140 ml of 90% high-efficiency grass herb emulsifiable concentrate per mu and 40 50 kg of water spray, it can control grassy weeds, some broad-leaved weeds and sedges in the field. It is required to prepare the land finely, with good soil moisture and strict planting.

3. Post-seedling stem and leaf treatment: the herbicides commonly used are to catch the net, kill it steadily, refine the grass gram and cover the grass with high efficiency, all of which are used to control gramineous weeds, and are basically ineffective against broad-leaved weeds. The application period should be in the 3-5 leaf stage of weeds, and the dosage per mu is 20% to take 80-100 ml of net emulsifiable concentrate, 20-30 ml of emulsifiable concentrate to be killed, 50-80 ml of 5% fine grass gram emulsifiable concentrate, and 20-30 ml of high-efficiency caustic emulsifiable concentrate, all of which are sprayed with water to form an appropriate amount of liquid.

The control effect is better when the soil moisture is suitable and the weeds grow vigorously. These agents can be quickly absorbed and conducted by weeds, and the rain will not affect the control effect 2 hours after spraying.