Epidemiology of boxwood blight in western North Carolina and Virginia and evaluation of the boxwood blight infection risk model.

Autor: Khaliq I; Hampton Roads Agricultural Research and Extension Center, Virginia Tech, Virginia Beach, VA, 23455, USA., Avenot HF; School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, 24061, USA.; Vestaron Corporation, 4717 Campus Drive, Kalamazoo, MI, 49008, USA., Baudoin A; School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, 24061, USA. abaudoin@vt.edu., Coop L; Oregon Integrated Pest Management Center, Oregon State University, 4575 Research Way, Corvallis, OR, 97333, USA.; Department of Horticulture, Oregon State University, 4017 Agriculture and Life Sciences Building, Corvallis, OR, 97333, USA., Hong C; Hampton Roads Agricultural Research and Extension Center, Virginia Tech, Virginia Beach, VA, 23455, USA. chhong2@vt.edu.; School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, 24061, USA. chhong2@vt.edu.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Nov 05; Vol. 14 (1), pp. 26829. Date of Electronic Publication: 2024 Nov 05.
DOI: 10.1038/s41598-024-76443-5
Abstrakt: Boxwood blight, caused by Calonectria pseudonaviculata, is a highly invasive emerging disease. Since the first US report in North Carolina and Connecticut in 2011, boxwood blight has spread to over 30 US states, risking more than 90% of boxwood production. Our study investigated the disease field epidemiology and evaluated the boxwood blight infection risk model's prediction by analysing weekly blight monitoring data collected on detector plants exposed to the prevailing environmental conditions at two different locations (western Virginia and North Carolina) from spring through fall of 2014 to 2017. Boxwood blight was recorded in 61 of 86 weeks, with the highest infected leaf counts recorded in late summer or early fall. Rainfall, high relative humidity outside rainy periods and optimal temperatures (13.6-22.7 °C) during prolonged leaf wetness (> 65 h per week) had a significant positive effect on boxwood blight development. Classification analyses showed that disease predictions from the model using leaf wetness estimated by leaf wetness sensor were more closely aligned with observations from the field than predictions based on algorithms. This study improved our understanding of disease field epidemiology, provided leads to improve the existing model, and generated essential knowledge for formulating effective strategies for blight mitigation.
(© 2024. The Author(s).)
Databáze: MEDLINE
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