Sensitivity detection of anthracnose pathogen in mango to prochloraz.
Qin LiPing, Shi GuoYing, Xie Ling, Wang CanQin, Ren Hui, Cen ZhenLu, Hu ChunJin, Mo JianYou
Author Affiliation: Microbiology Research Institute, 1b Horticulture Research Institute, 1c Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China.
Journal of Southern Agriculture 44 : 594-597
Abstract : Objective: The present experiment was conducted to monitor the sensitivity of mango anthracnose fungi to prochloraz, in order to provide references for its scientific prevention and proper use of drugs in Guangxi. Method: Strains of mango anthracnose pathogen were isolated, purified and detected using mycelial growth rate method. Result: The EC50 value of 53 isolates ranged from 0.0244 to 0.2572 mg/L, and the mean EC50 was 0.0916 mg/L. The maximum EC50 value (0.2572 mg/L) from the strain in Dongda village, Tiandong county was 10.5 times higher than the minimum EC50 value (0.0244 mg/L) from the strain in Junting village, Lingyun county. Conclusion: As no sign of resistance to prochloraz occurred in the 53 strains of anthracnose pathogen from the dominant mango growing areas in Guangxi, prochloraz was applicable in mango production. However, the potential resistance risk should be paid attention since there was considerable variation in sensitivity to prochloraz among the isolates of Colletotrichum spp. from mango.