Controlling Effect of Different Preservatives on Virus-free Potato Plantlets Contamination
KANG Ping-zhi1，ZHANG Li-rong1，SHEN Rui-qing1*，GUO Cheng-jin1，ZHAN Hong2
1Institute of Plant Protection，Ningxia Academy of Agriculture and Forestry Sciences，Ningxia Key Laboratory for Controlling Plant Disease and Insect Pest，Yinchuan 750002，Ningxia，China|2Ningxia Propagation Center of Virus-free Seed Potatoes，Pingjipu 750024，Ningxia，China
Abstract：The control effects of 3 preservatives on virus-free potato（Solanum tuberosum L.）plantlets contamination were studied by calcium propionate，sodium dehydroacetate and potassium sorbate．The results showed that potassium sorbate had the best controlling effect on virus-free potato plantlets contamination．Its contamination rate was 0 in the 0.18 g?L-1 concentration level，and had no influence on the growth of virus-free potato plantlets．Its continuous effect is strong，and is regard as the best antibacterial agent concentration．Sodium dehydroacetate showed obvious control effect on virus-free potato plantlets contamination in 0.05-0.09 g?L-1 concentration level．Its contamination rate was 0-10%，but the growth of virus-free potato plantlets was inhibited．The controlling effect of calcium propionate on virus-free potato plantlets contamination was the worst．
