Soybean is a common oil crop in life, and it is widely cultivated in China. In the process of soybean planting, it is inevitable that some weeds will be harmed. This article will introduce the pesticide control points of bean field weeds in detail.
First, the technical points of prevention during the sowing period
1. For plots dominated by grass weeds, within 3 days after sowing, use 50% acetochlor EC 100-150 ml or 33% pendimethalin 150-200 ml before emergence. Spray 50-80 kg of water on the surface of the soil. Under drought conditions, it is necessary to increase the water consumption or shallow soil by 2 cm.
2. For plots of broadleaf weeds such as purslane and shovel, use 50% acetochlor EC 100 ml + 24% oxyfluorfen (diphenyl ether herbicide) before sowing. ) 10-15 ml of emulsifiable oil sprayed on the soil surface, the soil organic matter content is low, the sandy soil, the low soil, the water is sufficient for low dose, and the high dose is used instead. At the same time, we remind everyone of the problem of phytotoxicity. Soybean seedlings encounter low temperature, high humidity, long-term accumulation of water in the field or excessive drug volume, which is susceptible to phytotoxicity. The symptoms are leaf shrinkage, but soybeans grow 3 leaves and temperature. After rising, normal growth can be resumed, generally without affecting the yield.
Second, the main points of prevention and control during the growing season
1. A plot dominated by grass weeds, 50-70 ml of 5% quizalofol emulsifiable concentrate, or 10.8% high-efficiency flupirtine emulsifiable concentrate 20-40 ml, 30 for water. Kilograms of spraying.
2. For plots with broadleaf weeds, when the weeds are basically in the seedling stage, 10-30 ml of 10% acesulfame emulsifiable concentrate is applied per mu, and 30 kg of water is sprayed.
3. For plots mixed with gramineous and broadleaf weeds, when the weeds are basically in the seedling stage, the use of 7.5% He Kuolin (registered by the Ministry of Agriculture as fluorocarbazone· quizalofop) emulsifiable concentrate 80-100 ML, or 50 ml of 5% quizalofol EC 50-75 ml + 25% acifluorfen (diphenyl ether herbicide), spray 30 kg of water.
In the above three cases, the specific drug dosage should be determined according to the grass condition and the sensation, and the high dose should be used when the grass is large and the sputum is bad. It is reminded that the diphenyl ethers should be applied in 2-4 tablets of soybeans. It is easy to produce phytotoxicity when the pesticides are applied too early or too late.
Ball Valve,Pvc Ball Valve,Ball Check Valve,Threaded Ball Valve
Haogong Valve Co Ltd , https://www.haogongvalve.com