1. Symptoms: Rice bacterial streak disease is referred to as thin strip disease. When the occurrence degree is heavy, the leaves are dry and the red leaves of rice fields are affected after the onset of rice. The photosynthesis of rice is affected, the rate of misrepresentation is increased, the rate of Weight Loss is reduced, and the incidence is severe. Even caused heading difficulties and increased neck rate. The general reduction of production is 15%-35%, and the serious reduction of production can be more than 60%.
The disease mainly damages the leaves, and sometimes it also damages the leaf sheath. Lesions occur between the veins, beginning with dark green dots, and are limited by the veins after expansion. They become yellowish-brown, slightly moist strips, parallel to veins, and can grow to more than 1 cm in length. There are a large number of bacterial spills on the streak. They are waxy yellow. After drying, they become countless yellow hard microbeads. Plaque gathers and synthesizes plaque, but the original brown stripes can still be seen quite clearly, but not necessarily. There are bacterial beads or bacteria spills, after the convergence of the old spots, the color can be gray, when the leaves on a large number of tissue dead, much like bacterial blight, but the borders of the disease department, the disease's streak can still be identified .
2, control methods:
1 Strengthen plant quarantine, select disease-resistant rice seeds, disinfect rice seeds, and use chemicals such as strong chlorine extract or double soaking.
2 Rectify irrigation and drainage systems to prevent flood irrigation and string irrigation.
3 Appropriate application of phosphorus and potassium fertilizers during fertilization to prevent excessive and late application of nitrogen fertilizer.
4 After the heavy rains, they should be drained immediately. Lime and grass ash can be applied to prevent the spread of diseases.
5 The incidence of field crops and replanting areas in previous years and low-lying water plots should be controlled in time for pesticide application. The climate should be beneficial to the incidence of disease should be applied continuously 2-3 times, once every 7-10 days, the pharmaceutical can use agricultural streptomycin , Shi Dao Ling, cutting bacteria, bacteria off.
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