Soybean flowering field management?
Soybean flowering management requires five defenses: 1. Anti-loft After flowering, soybeans enter the period of vegetative growth and reproductive growth. To prevent lodging, cultivating soil should be carried out before the flowering and sealing of soybeans to promote good permeability of the soil in order to facilitate the development of the root system, increase the number of lateral roots, and increase lodging resistance. 2, anti-experts First, spraying 15% paclobutrazol per acre at the initial stage of flowering to 50 kilograms of water per acre can promote the growth of soybean stalks, which is not easy to grow long. Second, it picks up the core at the initial flowering stage or full flowering stage of soybeans and removes the top of the main stem by 2 cm. Therefore, the soybean leaves can be thickened, the plant height can be reduced, the control can be lengthened, and the number of scabs can be increased. 3, prevent premature aging During the flowering period of soybeans, vegetative growth and reproductive growth have entered an intensive period and require more nutrients. If the soil is poor in fertility, lack of nutrients, and debilitating growth, it will affect the growth of the plants and the number of scars and reduce the yield. For weaker growing fields, urea topdressing 4~5 kg per acre is used in the early flowering period. At the same time, 0.4% potassium dihydrogen phosphate solution can be sprayed on the foliage to ensure nutrient supply and increase production. Drought prevention 4. The flowering period is the key period for soybean water demand. At this time, the metabolism is strong and the water consumption is large. In case of drought, soil moisture content decreased, easily lead to plant physiological water shortage, causing a large number of falling flowers. Water must be supplemented, irrigation should be promoted with small water, and water should not be too large to prevent flooding. However, in case of heavy rain or continuous rain, it is necessary to drain water in time to prevent flooding. 5, pest prevention Soybeans in the flowering period have poor resistance to the outside world's unfavorable environment. Spraying chemical pesticides at this time tends to make the buds fall off and reduce the yield. Therefore, prevention and control of pests and diseases should be based on agricultural control and early prevention and treatment. The spray concentration must be strictly controlled. The spraying time must be after 5pm. Soybean aphids: These are the main pests that harm soybeans. Use 10% osmium net 2000 times liquid spray control. Bean hawk moth: Before the third instar of pod moth, it was treated with BT powder 500 times or with 90% crystal trichlorfon 800 times or avermectin spray. Soybean borer: Around August 20, it is a critical period for the control of soybean borer. It can be treated with dichlorvos fumigation or pyrethroid pesticides and avermectin spray. Soybean Meal: In early August, the larvae were in their peak period, and were treated with 40% omethoate 1500 times or with 90% crystals of trichlorfon 1000 times or avermectin spray. In the early flowering period of soybean, rust, blight, leaf spot, and virus diseases are prone to occur. Control methods: use virus A plus 50% thiophanate or zein zinc, 500 ~ 600 times liquid spray control. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone Medical Equipment Disposal,Syringes Needles Sizes,Disposable Syringe,Insulin Syringe FOSHAN PHARMA CO., LTD. , https://www.fspharmamedicine.com