In view of the serious occurrence of gray mold during the flowering period of grapes in Guangxi,the resistance to gray mold was investigated and analyzed in the inflorescence of fourteen varieties cultivated under rain-shelter during the second crop.According to the results of natural identification in the field,the reliability of field identification results was verified by artificial inoculation of Botrytis cinerea in inflorescences of four representative varieties with large differences in resistance.The results showed that two high-resistant varieties(Longziwang,Longzibao),two resistant varieties(Jinguang,Shennong Cuifeng),and three susceptible varieties and seven highly susceptible varieties were selected by field investigation;and both methods showed that'Longziwang'and'Longzibao'were grapevine germplasm with high resistance to gray mold.
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