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Effects of temperature, moisture, substrates and soil coverage on sclerotium germination and hyphal growth of Southern blight of apple in China

Authors :
Xiangli Dong
Chang-yan Gao
Baohua Li
Shan-yue Zhou
Sen Lian
Li Pingliang
Source :
European Journal of Plant Pathology. 162:477-487
Publication Year :
2021
Publisher :
Springer Science and Business Media LLC, 2021.

Abstract

Southern blight, caused by Sclerotium rolfsii Sacc., is a significant disease of apple in China and many other counties. Sclerotium germination and hyphal growth are two critical processes for epidemic development. Controlled experiments were conducted to study the effects of environmental conditions on sclerotium germination and hyphal growth of the pathogen. Temperature for sclerotium germination and hyphal growth of S. rolfsii ranges from 15 to 35oC with the optimum at 31.5oC. The soil water content needs to exceed 30%, and once over this threshold, soil water content did not affect sclerotium germination and hyphal growth. The rate of sclerotium germination was high in sawdust, and hyphae grew fastest in the mixture of sawdust and soil. Sclerotium germination and hyphal growth were inhibited in nursery substrate. Hyphal growth was affected by pH but to a far lesser extent sclerotium germination. Soaking in water inhibited sclerotium germination.

Details

ISSN :
15738469 and 09291873
Volume :
162
Database :
OpenAIRE
Journal :
European Journal of Plant Pathology
Accession number :
edsair.doi...........f2b7f4d10421d83108e649984e027a7d
Full Text :
https://doi.org/10.1007/s10658-021-02418-1