And control of potato bacterial wilt _4015

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And control of potato bacterial wilt

Sub-normal transport, secretion of toxic substances in toxic host cells, causing rapid wilting plant death. Since 1990, potato bacterial wilt in the widespread occurrence of Xide County, harmful levels increased year by year, according to surveys over the years, to 1998,[link widoczny dla zalogowanych], 24 county townships (towns) and bacterial wilt incidence rate of 24.9% on average, individual rural (town) up to 53, the incidence area 1513.3hm, the total area of 41.2, yield loss 454t. 1999 to 2001, the International Potato Research Center, Chinese Academy of Sciences how far researchers and state ceremony under the guidance of plant protection station, integrated control of potato bacterial wilt project, the county has 24 townships (towns) to implement. Total area of 67,386 acres of comprehensive prevention and control times, accounting for 5.5 million mu of sown area of 122.5 potato. 3 years of persistent efforts by not only effectively reduce the hazards of potato bacterial wilt, but also greatly increase the yield per unit area. Significant economic benefits of integrated control effect and have been leaders at all levels attach great importance and recognition to achieve the intended purpose of the project. Worked in Luji, Mubarak, according to Luo, the two estuaries four townships (towns), the establishment of 2,000 acres of integrated control demonstration, caught out of the results. Summarized below. Natural factors, risk factors 1.1 1 seed contaminated ��, �� residual soil bacterium, �� 6 ~ 8 �� water concentration, light intensity, relative humidity. 1.2 Human Factors extensive farming, cropping, flat habits die hard for, does not deal with diseased plant debris, livestock, open place, not composting the manure application and so on. 2 years of onset of regular survey from: potato bacterial wilt in 6 months, late onset, in July, the middle peak incidence, basically ended in early August. The severity and incidence of altitude, temperature and humidity, rainfall has a direct relationship. As the altitude increases, the incidence gradually reduced; precipitation, rain day gradually increased, the incidence gradually increased. Control of 3 currently in production of potato bacterial wilt no effective drug prevention. Only through comprehensive prevention and control measures to mitigate agricultural damage. 3.1 change farming practices, extensive changes in farming practices. Strictly enforce the change level for the ridge ridge or piles of earth. Dam has a high ridge hand, lm open car, two rows of potato species, nest spacing 26. 7 �� 33.3cm. Sloping ridge of soil piles to implement the method for the diagonal ridge, flat 36.7 �� 33.3era, every pile of potato species and 3 nest, isolated bacterium infection with the soil water infiltration. 3.2 strict rotation. Intercropping green manure, divisible every seedling, processing strain debris, reducing the amount of soil bacteria sources to reduce the incidence of the field. Adjust the soil pH of 3.3. Acres of lime powder withdrawal 5Okg, ash 5kg, adjust the soil pH, improve plant resistance to disease. 3.4 The selection of disease-free seed potatoes and the cutter disinfection. With 75 alcohol, each cut a potato, cutting sterilization 1. Cut vascular discoloration of potato tubers were found,[link widoczny dla zalogowanych], no breeding, focus. Net 3.5 application of fertilizer. Implementation is not contaminated manure application, fertilizer Shimoji before full maturity after the application. 4 4.1 General control effect from 7 field survey the incidence of mid-and late on Luji, Mubarak, according to Luo, He Poirot, the two estuaries five township (town), 10 villages, 3O groups, 474 to the incidence survey. Among them, there is no comprehensive prevention, the survey 200, 10000, the incidence of 875, the average incidence rate of 8.8 lines; integrated control investigation of 274, 13 700, a strain 263, the average incidence of strains 1.92%, the relative control effect 85.2. 4.2 Comparison of fields and production is not integrated control and acceptance inspection 135, 2025m, fresh potato 4290.8kg, average yield per m 2.1kg,[link widoczny dla zalogowanych], folding mu 1399 .3 kg; comprehensive prevention to acceptance 135, 2025m, fresh potato 5059.5kg, the average yield per m 2.51kg,[link widoczny dla zalogowanych], folding mu 1672.8kg, the average acre yield 273.4kg, yield 19.6. 5 Economic and social benefits 5.1 The economic benefits of the acceptance of production basis, from 1999 to 2001, the county comprehensive prevention and control of potato bacterial wilt total area of 66,690 acres, acres of integrated control than not yield 251.6kg, total yield 16.78 million kg, according to market price 0.30 yuan / kg total economic benefit of 5,034,000 yuan, is considerable. 5.2 The social benefits of integrated control measures through agriculture, reducing disease, increased yield, increased public awareness of prevention and control of potato bacterial wilt, and enhance confidence in the economic development in ethnic minority areas has played a positive role. 6 Conclusion agricultural control measures as long as the formation of new cultivation system, persist year after year, ring ring buckle, potato bacterial wilt in alleviating the damage is beyond question.