In:
Plant Disease, Scientific Societies
Abstract:
Apple rust caused by Gymnosporangium yamadae is a significant disease in China’s main apple production areas. We evaluated the effects of temperature, moisture, and ultraviolet (UV) light on the germination, infection, and survival of teliospore horns and basidiospores under artificially controlled environmental conditions. The temperature required for the germination and infection by G. yamadae teliospores and basidiospores ranged from 5°C to 25°C, with an optimum of approximately 17°C. The teliospore horn germinated when soaking in distilled water for 5 min and required at least 2.3 h of development to produce basidiospores under the most favorable conditions. Basidiospores could only germinate in free water and produced germ tubes 0.8 h after being placed in the water. The half-life of the basidiospore was 72.5 h in the dark and only 9.5 h when exposed to intense UV light. The basidiospores inoculated on the host leaves required at least 2.3 h of water exposure to cause rust lesions. A revised Weibull model could describe the relationships between the germination and infection of teliospore horns and basidiospores with temperature and wetness duration. Collectively, these results can serve as a valuable guide for developing a model to predict future apple rust epidemics and establish a method for effective control strategies.
Type of Medium:
Online Resource
ISSN:
0191-2917
,
1943-7692
DOI:
10.1094/PDIS-11-22-2576-RE
Language:
English
Publisher:
Scientific Societies
Publication Date:
2023
detail.hit.zdb_id:
2042679-3
