What is banana root nematode disease and how to control it?

What is banana root nematode disease and how to prevent it? Please give an introduction to banana root nematode disease and control methods as follows: (1) symptoms root nematode infection banana roots, damaged large roots performance short and fat, and cracking, small roots sometimes can form tumors. Sometimes not developed into a large root is destroyed, swollen tissue can be seen when brown punctate. Due to nematode damage and infection by bacteria, so that root rot, effective roots less. Above ground part mainly shows plant dwarfing, yellow leaf or clump leaf, loose handle, leaf edge losing green, dead leaf more, leaf wavy wrinkle. Plants budding, old leaves charred, withered from leaf margin to middle rib. Severe ear can not be normal under the curve, fruit thin, shriveled stiff, sometimes symptoms like bunchy top disease, but petiole without "veins." (2)There are 13 genera and 31 species of root nematodes parasitizing banana in China, among which spiral nematode, root-knot nematode and dwarf nematode are the most common and have certain harm to banana. Root-rot nematodes and needleworms can form large colonies locally, and their destruction is also noteworthy. There are more destructive perforating nematodes in foreign countries, so special attention should be paid when introducing foreign banana buds. Fujian Province is the most damaged banana plant in China, Wuchuan County and Suixi County in Guangdong Province have also been seriously damaged by nematodes. Root nematodes mostly occur in banana orchards with extensive management of sandy soil, especially in drought, and rarely occur in clayey soil. (3)The control method adopts disease-free seedling planting: in the disease area, the sucking bud root should be cut off first, and the banana head should be soaked in hot water at 55℃ for 5 minutes to kill the root nematode and then planted. Chemical control: The diseased banana garden can be regularly applied with nematicides for soil disinfection. The chemicals include carbofuran, kexianphos, aldicarb, methyl isofenphos, etc., with 2-3 g of effective ingredients per plant, once every 2-3 months, and strengthen fertilizer and water management. Crop rotation to purify soil: banana orchard with heavy disease, rotate with sugarcane, soybean, rice and other crops, and purify weeds and sick roots. When replanting bananas, plough the soil and whiten it thoroughly. Click for more banana growing techniques Click for more fruit growing techniques