Screening Of Fungicides Against Valsa Mali Miyade Et Yamada And Research On The New Use Of The Fungicides

Shaanxi province is the optimal ecological zones for apple produced. Shaanxi is the onlydistrict where many indexes tested measure up to the level of the most optimized region. Now,the apple industry has become one of the six pillar industries in Shaanxi. Its apple has won theNational Award for quality products repeatedly. And has reputation in domestic and overseasmarkets. Shaanxi is the fastest-growing on fruit industry provinces in China. The appleacreage in Shaanxi reached935million mu as the production reached9.03million tons in2006. Since then, the cultivation area, yield and quality of Shaanxi apple rank first in China.Because the apple industry is good for solving the "three rural issues", raising farmers’incomes and living standards, and can strengthen the export capacity in Shaanxi. It also playsa pivotal role in the economic development in Shaanxi now.Recently, apple canker occurs seriously, and the range of infection are very broad,including young or senescence trees; the disease even can result in imperil of whole appleorchard. So the screen of fungicide and the new method to control apples rot was detect, themain contents include was: screen of fungicide, virulence test on the fungicide,"Fubitie"manufacture and the promotion test of the fungicide in the orchard.The obtained results are asfollows:1. Screened two agents have a good control effect on apple rot disease. There are12.5%diniconazole WP and “Lvdu”. The cure rate12.5%diniconazole was the best one that wasreached98.33%, and8.45percent higher than the control. The cure rate100times "Lvdu"was reached96.00％.2. The determination of four pesticides that showed that12.5%diniconazole WP and“Lvdu” have a good control effect on Valsa mali Miyade et Yamada.3. The best formulation of "Fubitie" was determined. The use of agents was obtained.The promotion test of the fungicide in the orchard showed that the effect of12.5%diniconazole was best. Its average rate of wound healing up to49.18%, and the relativecontrol efficiency is90.18%."Fubitie" has a stable effect to the disease as it can affixed to thebark scraped stably.