Impact of soil factors and temperature on infection and development of Heterodera schachtii and screening of resistant sugar beet varieties
Sugar beet cyst nematode(BCN),Heterodera schachtii is one of the most devastating pathogens in sugar beet production worldwide and also an important quarantine pathogen in China.In 2015,this dangerous nematode disease was first discovered in Xinjiang,China,and caused great harm in China.In this study,the infection and development process of H.schachtii under different soil properties,temperature,and pH conditions were determined.The resistance of 24 sugar beet varieties to H.schachtii were screened and identified by artificial inoculation.The results showed that during the infection and development of H.schachtii,the optimum sand to soil ratio was 1∶0 and 6∶1,the optimum temperature was 25℃,and the optimum pH value was five to nine.The main beet varieties in China showed sensitivity to H.schachtii,and only one beet variety'Cofco1001'showed resistance to H.schachtii.These results laid a foundation for further clarifying the occurrence regularity of H.schachtii in China and formulating scientific prevention and control strategies.
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