1. College of Agronomy， Jilin Agricultural University， Changchun 130118， China；2. Institute of
Plant Protection， Baicheng Academy of Agricultural Sciences， Baicheng 137000， China；3. North?
east Institute of Geography and Agricultural Ecology， Chinese Academy of Sciences， Changchun 130012， China
Abstract：Five rice varieties “Tongke 37”“Jinong 521”“Guangdao 1”“Songjing 18” and “Long‐yang 17” were selected for field plot experiment. Five-point sampling method and 0-9 disease classification were used to analyze the effects of rice Scleortium oryzae on 1000-grain weight and chalkiness rate of rice. The results showed that Sclerotinia sclerotiorum could reduce 1000-grain weight and increase chalkiness rate of rice; The 1000-grain weight of five rice varieties was negatively correlated with the disease grade of Scleortium oryzae, and the chalkiness rate was positively correlated with the disease grade of Scleortium oryzae. The control effects of liquid beneficiary silicon and solid
active water-soluble silicon on rice variety “Changbai 9” were studied at booting and heading stages.The results showed that silicon fertilizer could significantly reduce the disease index of Scleortium oryzae, and the disease index showed significant difference after applying liquid and solid silicon fertilizer. The results of this study can effectively control the occurrence of rice Sclerotinia sclerotiorumin soda saline-alkali soil and provide a new way for the development of new green control reagents.
