First, the distribution and damage of soybean cyst nematode disease in China's Henan, Shandong, Jiangsu, Anhui and other soybean production areas generally occur. The disease is caused by the parasites of soybean cyst nematodes, which can reduce soybean production by 10% to 20%. In severe cases, the loss can be as high as 50%, and even be eliminated. In addition to endangering soybeans, the disease also harms many legumes. Second, the symptoms of soybean cyst nematode disease mainly damage the roots, so that the aboveground plant growth is poor, dwarf, yellow stems and leaves, flower groups, less strong or not strong. Pulling up the diseased plants showed that the roots were underdeveloped, the lateral roots were reduced, the fine roots were increased, the root nodules were significantly reduced, and white granules were attached to the roots. Third, the occurrence of regular cyst nematode eggs in the cysts winter in the soil. In the spring of the following year, eggs hatch into the soil. The female larvae invade from the root hairs of the roots, harm in the cortex tissue of the roots, and develop into lemon forming insects, breaking through the cortex of the roots, exposing the surface of the host, and adsorbing on the host roots with mouthparts. Soil sand, thin, alkaline, high soil temperature, good permeability, is conducive to larvae activity and dissemination, serious incidence of continuous cropping. Fourth, control methods (a) agricultural measures. Rotate with cereal crops for 1 to 2 years, increase phosphate fertilizer, timely irrigation. (b) Chemical control. Use 3% carbofuran granules per acre 2 to 4 kg, apply pesticides in the sowing ditch, and cover the soil after application. Per acre can also be used 3% of methyl isofluosal granules 5 ~ 6 kg for furrow application, after the application of soil cover.
Functional Oligosaccharide
Functional oligosaccharides refer to oligosaccharides that are difficult or impossible to be digested and absorbed by the human body and have special physiological effects on the human body. Its sweetness is generally only 30-50% of that of sucrose, and it has physiological functions such as low-calorie, anti-caries, prevention and treatment of diabetes, and improvement of intestinal colony structure. Due to the special physiological functions of functional oligosaccharides, it becomes a nutrient and health care product. A new generation of food-effect raw materials that integrate diet and therapy. It is a new functional sugar source that replaces sucrose and has a wide range of uses and application prospects. Common functional oligosaccharides include: xylo-oligosaccharides, fructooligosaccharides, galacto-oligosaccharides, isomaltose, raffinose and so on.
XOS, GOS, FOS, IMO, Raffinose, oligosaccharide
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