Biological characteristics of Fusarium mangiferae and indoor toxicity determination of different fungicides to F. mangiferae.
Liu Feng, Zhan RuLin, Wei JiGuang, Chang JinMei
Author Affiliation: South Asia Tropical Crop Research Institute, CATAS, Key Laboratory for Post-harvest Physiology and Technology of Tropical Horticultural Products of Hainan Province, Zhanjiang, Guangdong 524091, China.
Journal of Fruit Science 29 : 428-433
Abstract : The growth characteristics of mango malformation pathogen (Fusarium mangiferae) were studied under the conditions of clifferent media, temperature, light intensity and carbon/nitrogen, and the toxicity of 9 fungicides to F. mangiferae was determined indoor for screening the fungicides with good control effect on mango malformation disease. The results showed that the best culture medium for the mycelial growth rate, growth quantity and sporulation were OMA, liquid PDA and PSA respectively, optimum temperature for mycelial growth and spore germination was from 25°C to 28°C. The effect of light and pH on the mycelial growth, sporulation and spore germination of the strain were not obvious. Sucrose was the best carbon source and yeast extraction was the best nitrogen source. 25% Prochloraz EG had the best control effect on mycelial growth, its EC50 was 1.200 4 mg.L-1 and EC95 was 2.623 9 mg.L-1. The best fungicide for the inhibition of spore germination was 25% Azoxystrobin SC, its EC50 was 0.531 2 mg.L-1 and EC95 was 2.974 1 mg.L-1. Both the fungicides showed better inhibitory effects on F. mangiferae and could be used as effective fungicides to control mango malformation disease.