What is the cause of ginger blast? How to prevent and cure ginger blast?

What is the cause of ginger blast? How to prevent and cure ginger blast? Also ask the netizens who know to help introduce that ginger blast mainly harms the rhizome, mostly at the base of the stem near the ground and the upper half of the underground rhizome. At the beginning of the disease, it was watery, yellowish brown, lost luster, softened and rotted. Leave only the outer skin. The rotting tissue turns into white, sticky juice and has a foul smell. The injured part of ginger stem was dark purple, then turned yellowish brown, and the internal tissue became brown and rotten. In the process of decay, because the rhizome lost the function of absorbing water, the upper leaves and harvested leaves of the stem turned yellow. in serious cases, the leaves wilted and curled, the color of leaves changed from yellow to withered brown, and finally the stems and leaves died. After the onset of ginger blast, the yield of ginger is generally reduced by 20% to 30%, the heavy ginger is 60% to 80%, and even the harvest is lost. Therefore, the farming network sorted out the causes and control methods of ginger blast, which are listed in detail below for netizens' reference. Ginger blast disease causes: reason 1, ginger seed-borne disease: the main pathogen infection source is the disease-carrying ginger pathogen, soil, fertilizer and water are not infected with bacteria, and ginger seed is the seed of sporadic disease last year, seed soaking with formalin for disinfection, the control effect reached more than 90%. The experiment shows that it is very important to strictly control ginger seed and carry bacteria in Xinjiang area. Reason 2, the disease of the infected field is serious: the stubble land of ginger blast and the surrounding land are stubble land, and ginger continuous cropping, resulting in early occurrence of ginger blast, serious harm, the incidence of ginger blast is more than 50%. In the first year, a piece of land fell ill, and it also affected many plots of land around that year. In particular, the diseased residual plants, diseased plants and rotten ginger blocks of most seriously diseased fields were thrown into the ridges and surrounding ditches, with Rain Water bacteria flowing into the surrounding and low fields, resulting in the recurrence of the disease next year. Thus it can be seen that the pathogen and disease residue in the soil of Laojiang area is one of the important sources of infection. Reason 3, the disease is transmitted by fertilizer and irrigation water: fertilizer contaminated by the disease residue, such as retting fertilizer and unfermented compost, unmature human and animal manure and other organic manure can lead to different degrees of disease. The disease occurs in the high land in the upstream, and the diseased water flows directly into the low land downstream, which will not only lead to the disease, but also lead to the rapid spread of the disease. After investigation, it is found that the bacteria in the diseased field can spread with running water, and flood irrigation and series irrigation is one of the important factors to accelerate the epidemic of the disease, especially when there are sporadic diseased plants in the field, the diseased plants often appear after irrigation, which is the result of bacteria spreading along the water and re-infection. Therefore, once the central diseased plant is found in Jiang Tian, shallow water ditch irrigation or irrigation should be adopted, and flood irrigation and series irrigation should be avoided. At the same time, use germ-free clean water, such as well water, river water, etc. Reason 4, affected by temperature: the main factors affecting the occurrence and prevalence of ginger blast are temperature, humidity and rainfall in addition to the pathogen. The optimum temperature of the pathogen of ginger wilt was 28: 30 ℃. According to the field observation, the daily average temperature was above 20: 30 ℃, and the optimum temperature was 28: 35 ℃. The initial onset of ginger blast was from late June to early July, the peak period was from late July to early September, and the disease stopped gradually in mid-late September. Due to the continuous high temperature of more than 40 days from July 20 to the first ten days of September 2003, and the temperature of the high temperature weather is above 35 ℃, the epidemic speed of the disease is fast and the disease is serious. The level of temperature can directly affect the epidemic speed of the disease. High temperature can increase the reproduction coefficient of bacteria, shorten the incubation period and increase the times of re-infection. The systematic investigation shows that it takes 15 to 18 days from disease to plant death at 20: 25 ℃ and 6 to 8 days from disease to death when the temperature is above 35 ℃. Reason 5, affected by rainfall and humidity: rainfall will directly affect the occurrence and epidemic speed of ginger blast. According to the comprehensive analysis of meteorological data and field incidence, from early May to late September in 2003, the daily average temperature of ginger in the whole growing period was more than 20 ℃, which basically met the temperature requirements of the disease. Then the occurrence of the disease sooner or later mainly depends on the rainfall from June to July and the ratio of rainfall to sunny days, while the degree of disease mainly depends on the rainfall at the initial stage of the disease and the warm and humid conditions in the peak period of the disease. Cause 6. Caused by ginger varieties: the comparison test showed that there was no significant difference in resistance to ginger blast among varieties. Seven varieties of Shucheng turmeric, Jinzhai ginger, Qianshan monkey ginger, Jiangxi Xingguo ginger, Zhejiang Wuzhengjiang, Shandong Dajiang and Shandong Laiwu small ginger were introduced from other places, and the disease resistance of Tongling white ginger (as control) was tested in the field. Results the disease occurred sporadically in all varieties and there was no significant difference, and the disease resistance among varieties needed to be further studied. Cause 7, the disease caused by other factors: for example, there are many underground pests in the field, which damage the rhizome and cause insect wounds, which is beneficial to the invasion of bacteria, and there is also a tendency to aggravate the disease. And Jiang Nong has the habit of peeling old ginger, which increases the number of mechanical wounds, which is conducive to the infection of germs. The results of the investigation showed that peeling old ginger occurred 710 days earlier, the incidence rate was 46.7%, and the incidence rate without peeling old ginger was 21.5%. The incidence of peeling old ginger was more serious than that without peeling old ginger. Prevention and control methods of ginger blast: method 1. Crop rotation is one of the important measures to solve the problem of soil bacteria. The rotation must be more than 4 years, and the effect of flood-drought rotation is better, and the new stubble land or paddy field should be used in the previous crop, and the land with high dryness and good drainage should be selected. The acid soil is sprinkled with quicklime 100~150kg/667 square meters, or the soil is disinfected with 1000 times of 50% dimethazone. Method 2. Select excellent ginger species: establish a sterile seed base, breed sterile ginger species, collect and store ginger separately, and fumigate the stored ginger with 40% formalin. The disease-free ginger species were selected and observed in the field in late September every year, and the fields with absolutely no bacterial infection, including the surrounding and upstream high terrain areas with no diseased plants were selected as seed plots. Method 3. Disinfect ginger seeds: disinfect ginger seeds with formalin solution before sowing. In germ-free fields, the control effect can be more than 80%. Therefore, 30min was soaked in 40% formalin 100x solution, and then soaked for 3 hours and 6 hours. Method 4. Use clean water to water and apply pollution-free fertilizer: irrigate well water, mountain spring water and river water that are not polluted by germs, and do not use ditch water from diseased fields. After the emergence of central diseased plants, put an end to flood irrigation, series irrigation, sprinkler irrigation, shallow water ditch irrigation or splash irrigation is better. The application of clean fertilizer is still an important measure to prevent the disease, and the organic fertilizer applied in Jiang field must be fully mature to compost and rett for high temperature sterilization and re-use. Bleach can be used for fertilizer and water disinfection. The application of phosphorus and potassium fertilizer in the base fertilizer can enhance the resistance of ginger. In winter, measures such as deep ploughing of soil, freezing and ripening of soil, and ripening by raw pressure can reduce the disease. Method 5. Timely eradication of ginger plague plants: digging out the central diseased plants can effectively control the spread of the disease and reduce the harm. The key is to eradicate it in a timely, thorough, complete and clean manner. The central diseased plant, including the neighboring healthy plant, should also be dug up, taken out of the field and buried deeply. At the same time, 5% bleach or fresh quicklime, or 72% agricultural streptomycin sulfate 3000 / 4000 times solution was applied to the disease. Method 6. chemical control should be adopted: ginger blast enters the high temperature, high humidity and rainy season from late June to early July, and ginger blast may break out and become a disaster. We should often go to the field for observation. Once sporadic disease is found, the whole field medicine will be used in the early stage of the disease. Through the field experimental study, the more ideal fungicides can be used for root irrigation control of pollution-free vegetables, such as 50% germicidal agent, 70% root putrefaction, 20% quick supplement, 50% dimethazone, 3% Kesong, 73% and so on. Can you still eat ginger after sprouting? How to cultivate soil by planting ginger