Effect of Wetness Duration and Incubation Temperature on Development of Ascosporic Infections by .

Clicks: 281
ID: 101141
2020
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Abstract
The impact of wetness duration and incubation temperatures on ascospore germination and ascosporic infection efficiency were evaluated. Ascospore germination was optimal when incubated in continuous moisture (free water) at 21°C. Significantly lower germination was observed at 10 or 30°C. Interrupting ascospore wet incubation was detrimental for germination. In infection efficiency studies, dry bean and canola flowers were inoculated with dry ascospores and placed on leaves of dry bean and canola plants, respectively. Dry bean plants were incubated for 196 h at 18 to 20°C in alternating 8 to 16 h wet/12 to 24 h dry periods. Canola plants were incubated for 240 h at 10, 15, 20, 25, or 30°C in alternating 6 to 18 h wet/18 to 6 h dry periods. Interrupting wet incubation delayed symptom appearance and hindered development of the epidemics on both plant types. Logistic regression models estimated at 50% the probability of disease development on dry bean and canola plants when 68 and 48 h of wet incubation at 20°C accumulated in a period of 6 days, respectively. The canola model was validated using data from field trials. Results of these studies will contribute to develop more accurate warning models for diseases caused by .
Reference Key
shahoveisi2020effectplant Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Shahoveisi, F;Del Río Mendoza, L E;
Journal Plant disease
Year 2020
DOI
10.1094/PDIS-06-19-1304-RE
URL
Keywords
Epidemiology fungi field crops disease warning systems oilseeds and legumes

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