Symptoms There are many kinds of pea virus diseases, more than 30 species have been identified abroad, and 9 species have been identified in China. Among them, BBWV is the major virgin pea in China, accounting for 59% of the tested samples, and usually shows severe symptoms such as heavy mosaic, plant short, leaf wrinkle, and early withering.
The pathogen is broad bean wilt virus referred to as BBWV, which refers to broad bean wilt virus and belongs to virus. The virion has a spherical shape with a diameter of 25 nm, a passivation temperature of 50 to 55° C., and a dilution point of 1000 to 10000 times, and the in vitro period of poisoning is 72 hours.
Transmission routes and disease conditions can be transmitted by non-permanent methods from Myzus persicae and soybean meal. In the field, complex infections such as BBWV and CMV or LMV often occur.
Prevention and control methods (1) Selection of resistant varieties such as soft peas No. 1 inside. (2) Reasonable planning for planting Because of the large number and large area of ​​poisonous crops in the nearby suburbs, the incidence of disease is heavy, especially in small areas. The development of the suburbs is promoted, and the planting is concentrated and the disease avoidance effect is obvious. (3) Choose good quality and high quality varieties. (4) timely sowing, nurturing strong seedlings, is conducive to the healthy growth of pea sprouts. (5) Planted with garlic, avoiding the obvious effects of disease prevention. (6) Early disease prevention and disease prevention. Production should be based on the weather, seedlings, pests in the first piece of real leaves after the timely spraying, after the next 5-7 days, then spray once. Common agents: 50% anti-inferiority WP 2000 times or 20% fluorinated 2000 times. (7) At the beginning of onset, spray 20% toxic nemesis (virus A) WP 500 times or 1.5% phytopathogenic emulsion 1000 times, 83 sensitizer 100 times, every 10 days or so, continuous control 3 - 4 times.
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