Glyphosate can effectively control soybean dodder

Soybean Cuscuta is a parasitic weed on soybeans, also known as rootless. After sowing soybean seedlings, the seeds of the seedlings in the soil begin to germinate. After the young stems extend out of the soil surface, they absorb the nutrients of the soybean plants and reduce the number of soybean flowering and sprouting. When the soybeans are severe, the whole soybean plants wither, and the yield and quality of the soybean are great. Impact. In the past, we controlled the use of acetochlor, lansoline, and ditergylamine in the pre-emergence and post-emergence treatments. Although the effect was not satisfactory, in recent years, soybean farmers in the soybean producing area used glyphosate. Prevention of dodder seedlings has achieved better results. Control efficiency is generally above 85%.
The principle of using glyphosate to control dodder seedlings is mainly to utilize the difference in the resistance to glyphosate between the two plants, parasitic and host, that is, soybean has strong resistance to glyphosate and can tolerate a certain range of medicinal liquids. Concentration, while the resistance of the dodder is poor. The method is shortly after the emergence of dodder, endangering the initial period of soybeans, the occurrence of field crops. When it was found that there was a center of occurrence of Cuscuta seedlings, use a 400-fold dilution of 10% glyphosate to spray on the soybean plants at the onset center. Spray evenly and do not spray. 10-15 days after spraying, there was a large number of dodder deaths. But 3-4 days after the drug, the young leaves of soybeans began to yellow, that is, a slight injury performance, but no significant impact on its growth and development, the rate of yellowing plants stopped expanding after about 7 days, and all the young leaves changed in about 10 days. Green, restore normal growth. In addition, we must also pay attention to the fact that due to the continuous occurrence of dodder seedlings in the field, they should be checked again and again for about two weeks after the first dose, so as to achieve complete prevention and control.

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