| In this study, the occurrence and chemical control measures of fruit rot on Thompson Seedless in Turpan area were studied from 2015 to 2016, and the dynamic changes in spores in field bacteria were investigated by using slide adhesion method, and the occurrence period and regularity of Thompson Seedless fruit rot disease were studied, and chemical control was carried out in cooperation with cuizer 1 000 times solution, 50% baobiformate 1 500 times solution, 30% ether metacylate 1 500 times solution, 30% phenyl ether methomonazole 2 000 times solution and 80% chlorothalonil 1 500 times solution. The results showed that the spores of the pathogen causing fruit rot on Thompson Seedless in Lukeqin occurred greatly from pre-anthesis to turning-color stage, and reached the peak at maturity stage. The number of spores was 207·cm-2 in 2015 and 427·cm-2 in 2016. The fruit rot of white seedless grape appeared for the first time at the end of heading (end of June), and it peaked before maturity in 2015. The annual rate was 34.75% in 2015 but increased to 60.21% in 2016. The spore occurrence rate was at peak at 8∶00 in one day, all above 20·cm-2, and the minimum spore number was less than 5·cm-2 at 14∶00 and 20∶00 in the afternoon. The use of chemical agents in late June or at the end of the head-sealing stage on fruits delayed the occurrence of fruit rot by spraying three times (10 days interval). The 1000 times dilution of chemical reagent Cuize or 2000 times of dilution of 30% Difenoconazole effectively controlled the occurrence of white seedless grape fruit rot disease and the efficacy can be above 80%. |