Bacterial wilt is a bacterial vascular bundle disease that can occur throughout the growing season of the potato. However, due to the low temperature at the seedling stage, it is not suitable for the development of bacterial wilt. Therefore, the symptoms are not manifested or the performance is not obvious. Symptoms in the bud and flowering period. Obviously, especially in warm, humid, rainy conditions. When the disease occurs, the young leaves or flower buds on the top of the plant appear wilting, and then the upper branches of the main stem or branches appear acute wilting, which can be restored sooner or later. After 4-5 days, all the stems and leaves of the plant are wilted, but the leaves are still Keep green, but the color is a little light, commonly known as bacterial wilt.
The pathogen infects the vascular bundle of the plant, browning the vascular bundle at the base of the stem and the root, and squeezing the cross section by hand, and the stained white pus exudes from the section. When the diseased potato is cut, the vascular bundle is browned, and there is no need to squeeze out the white pus on the cut surface, but the cortex and the potato are not separated from the vascular bundle, which is the main feature of the bacterial wilt. When the disease is severe, the epidermis is cracked and the pith is ulcerated.
Potato bacterial wilt control method
(1) Choose to plant early-maturing varieties that are resistant to disease.
(3) Rotation. With more than 3-4 years of rotation with cereals, the implementation of intercropping or water-and-dry rotation, causing the bacteria in the soil to lose the host and lose vitality, intercropping can also reduce the spread between the diseased plants and significantly reduce the disease.
(4) Strengthen cultivation management. Select sandy soil or loam with deep soil and good permeability, apply decomposed organic fertilizer and potash fertilizer, control soil water content, and germination treatment before seeding sowing to eliminate the slow and weak diseased potato to reduce the incidence. After cutting the large potato It is sterilized with fungicide and grass ash, and it is cultivated with high ridge to avoid flooding.
(5) Remove the diseased plants in the field in time and treat them as sick and disabled plants. When the wilt plant or part of the wilt plant is found in the field, the soil and potato pieces together with the base are buried or burned together, and the lime powder is sprayed around the diseased hole for disinfection.
A treatment plant for lake Kinneret water, comprising treatment by two filtration steps, flocculation and disinfection with chlorine dioxide, was studied with a view to evaluating the effect of ClO2 disinfection on drinking water quality and determining the optimal mode of operation for the treatment plant. Four modes of operation were studied and the optimal mode was defined as that in which the flocculant (aluminium sulphate) was introduced before the first, and ClO2 after the second, filtration. The finished water contained a residue of approx. 0.2 mgl−1 ClO2, approx. 0.35 mgl−1ClO2− and low concentrations of suspended matter (1.5 mgl−1) and of chlorophyll (0.1 μgl−1). Trihalomethane concentrations were negligible, and the bacteriological quality of the water was within the health authorities' requirements. It was shown that disinfection of treated water (after flocculation and filtration) was much more effective than that of raw water. Furthermore, disinfection in the optimal mode prevents accumulation of high chlorite concentrations leaving a residue of ClO2.
*Related Products:water cleaner chemical clo2.
Chlorine Dioxide For Brewery Factory, Chlorine Dioxide For Paper Bleach, Chlorine Dioxide For Beverage Factory, Cooling Water Treatment
Nanjing Ligong Shuifu Environmental Protection Technology Co.,Ltd. , http://www.watermanclo2.com