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In recent years, the small brown planthopper (Laodelphax striatellus Fallen) not only spread the rice stripe virus (Rice Stripe Virus, RSV) cause stripe disease, caused rice severe cuts, and because of the huge number of its population, but also caused by the growth of rice impact of rice panicle, grain discoloration black, affecting the quality of rice. Multitude of small brown planthopper large outbreak of stripe disease. With economic development, CO 2 rising concentrations of greenhouse gases mainly speed significantly accelerated. The degree of atmospheric changes in the environment of the small brown planthopper special it was poison, as virus infected the impact and influence, this paper carried out a study to explore. Also of atmospheric CO 2 concentration of rice under the body of SOD, POD activity and oxalic acid, SiO2 content was determined in order to explore in the future high CO 2 the stripe disease concentration by striatellus spread popular trend, provide a theoretical basis for the control of the occurrence of the disease. By the chamber method simulation of atmospheric CO 2 concentration study 370ppm, 470ppm, 570ppm-striatellus was poison. The results show that, in the the set time striatellus were poison the number of individuals with planthopper feeding is proportional to the time. The number of individuals feeding 32h of toxic significantly more than the number of individuals feeding 1h. The different CO 2 concentration, the planthopper was poison the number of individuals in the same feeding time although differences, but did not reach a significant level. The study also found that striatellus 370ppm (CK) under the conditions of feeding 1h, 2h, 4h, 32h after by the poison the number of individuals were 1.67,2.00,2.33,4 head / 30, were higher than 470 ppm, 570 ppm two a CO 2 concentration in the same time to deal with was poison the number of individuals, but the difference was not significant. RNA extraction of rice leaves the determination of the virus SBPH, results show the different CO 2 concentration affect the small brown planthopper transmission virulence. 570ppm of CO 2 concentration under the conditions of virus transmission capability lowest proportion of rice plants were poisonous minimum; most 470 ppm virus transmission capacity, the highest proportion of the rice plants were poisonous. The study also showed that three different CO 2 concentration conditions striatellus 1h after feeding, rice detected a virus, indicating SBPH virus capability is strong. Of course, the mass poisoning how many small brown planthopper feeding on rice plants, feeding the longer, the higher the proportion of rice plants were poisonous. Measured under different CO 2 concentration SBPH infected persistence. Whether it is the same CO 2 between the concentrations of different processing time, the same processing time CO 2 concentration, striatellus differences in the number of infected individuals was not significantly . The test can also be seen, CO 2 the infection rate SBPH concentration of 470 ppm under conditions change in different time periods, the 470 ppm CO 2 concentration may more suitable planthopper infected. High CO 2 concentration of rice plants in vivo activity of SOD. 370 ppm (CK), CO 2 SOD activity in the concentration under the conditions of 397.96 units (△ OD / g), and 470 ppm concentrations of SOD activity was 321.69 units (△ OD / g), but with 370 ppm (CK ), 570 ppm concentration compared to have reached a significant difference. The rice plants vivo POD activity and CO is directly proportional to the concentration of the relationship that CO 2 increased concentration of rice plants in vivo POD activity was significantly higher. The the rice body of oxalic acid SiO2 content of CO 2 concentrations positively correlated. The test results indicate that the rice plant body of oxalic acid, SiO2 content in the differences between the treatment of three concentration reached a significant level. Particularly 570 ppm of oxalic acid content of 0.038mg / g, which is 1.8 times the content of 370ppm (CK) 0.021mg / g. Finally, discuss the relationship between the rice plants in vivo activity of oxalic acid and SiO2 content of rice resistant.
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