Pineapple Blight, also known as pineapple root rot, is locally known as "pineapple pods." This disease occurs in Hainan, Guangdong, Guangxi, Fujian and Taiwan. First, the symptoms The aboveground part showed yellowing, reddening, shrinkage, and loss of luster at the base of the disease. The leaf margin curled inwards. Afterwards, the tips of the leaves became dry and the leaves withered and the plants stopped growing. As the disease progresses, some or all of the root system decays from root tip decay, and the plants die. Most people think that the disease is caused by viruses infected by pineapple mealybugs. Second, the incidence conditions 1. Climate factors. In general, high temperatures, arid autumn and winter are prone to disease, but it is also common in low-temperature, rainy springs. In Hainan Province, it mostly occurred from November to January-February. 2, plant growth factors. Plant growth is generally strong, fertilizer and water management is high, overly densely planted land is susceptible to disease and heavier. 3, environmental conditions. The hilly soil is easy to accumulate on the mountain, steep slopes, serious soil erosion, poor root exudation and poor water retention, and the roots are easy to wither and wither. 4, underground pest factors. Abuse of roots such as cockroaches, termites, cockroaches, etc. may exacerbate the occurrence of blight. Third, prevention and control technology 1, strictly selected disease-free strong seedlings. Do not introduce species from wards and fields. If introduced from the ward, we must strictly apply the liquid to soak the roots of the seedlings for 2 minutes, and invert the side to allow the liquid to accumulate in the base of the leaf to kill the remaining whitefly in the seedlings, and then dry and replant. Immersion seedlings can be used 50% marathon EC 800 times, 40% dimethoate 800-1000 times or 80% dichlorvos EC 1000 times. 2, drug treatment. When the diseased plant was found, the above-mentioned agent could be promptly selected and mixed with 50% thiophanate-methyl wettable powder 400 times liquid and 1%-22% urea to promote yellow leaf greening. The soil surface around the diseased plants and other healthy plants must be applied with one of the above-mentioned insecticides to prevent whitefly and underground pests. 3, to improve the environment of the garden. Note the use of plantations. Strengthen management. The use of sorghum planting, to avoid orchard water and soil erosion, to kaolin and viscous heavy soil should be added organic fertilizer, improve soil aeration, promote root growth, timely removal of diseased plants and burned. Xray Radiation Lead Undershorts,X-Ray Protective Lead Underwear,Radiation Protection Lead Underwear,X-Ray Protective Lead Underpants Longkou Kangxie Medical Instrument Co., Ltd , http://www.kangxiemedical.com
Symptoms and prevention techniques of pineapple rickets