Replacing low-risk fungicides with high-risk fungicides for control of powdery mildew in a resistant and susceptible summer squash cultivar in New Jersey

IF 1.7 Q2 PLANT SCIENCES Plant Health Progress Pub Date : 2022-10-17 DOI:10.1094/php-06-22-0058-rs
A. Wyenandt, Anthony J. Noto, D. Ward
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Abstract

From 2016 to 2018, six fungicide programs for the control of cucurbit powdery mildew (Podosphaera xanthii) on a powdery mildew resistant summer squash ‘Reward F1’ and powdery mildew susceptible ‘Senator’ were evaluated with an emphasis on reducing the number of chlorothalonil applications. In all three years, cucurbit powdery control was greatest (based on lowest AUDPC values) when fungicides with a high-risk (HR) for resistance development and with different modes of action were applied in rotation season long or when HR fungicides were applied before and following the onset of disease development, rather than weekly following symptom observation in the susceptible and resistant cultivars. For a disease such as cucurbit powdery mildew, where there are multiple HR fungicides with different modes of action available and where their use could be limited to one or two applications per growing season, these fungicides might be suitable replacements for protectant fungicides in cucurbit crops that have stable, genetic resistance to cucurbit powdery mildew.
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用高风险杀菌剂替代低风险杀菌剂防治新泽西一种抗性易感夏南瓜白粉病
从2016年到2018年,对抗白粉病的西葫芦“奖励F1”和白粉病易感的“参议员”进行了6种黄瓜白粉病(Podosphaera xanthii)防治方案的评价,重点是减少百菌清的施用次数。在所有三年中,当在较长的轮作季节中施用具有抗性发展高风险(HR)和不同作用方式的杀菌剂或在发病前后施用HR杀菌剂时,而不是在敏感和抗性品种的症状观察后每周施用时,葫芦粉防治效果最好(基于最低AUDPC值)。对于像葫芦白粉病这样的疾病,有多种具有不同作用模式的HR杀菌剂,并且每个生长季节只能使用一到两次,这些杀菌剂可能适合替代对葫芦白粉病具有稳定遗传抗性的葫芦作物中的保护性杀菌剂。
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来源期刊
Plant Health Progress
Plant Health Progress Agricultural and Biological Sciences-Horticulture
CiteScore
3.00
自引率
13.00%
发文量
82
期刊介绍: Plant Health Progress, a member journal of the Plant Management Network, is a multidisciplinary science-based journal covering all aspects of applied plant health management in agriculture and horticulture. Both peer-reviewed and fully citable, the journal is a credible online-only publication. Plant Health Progress is a not-for-profit collaborative endeavor of the plant health community at large, serving practitioners worldwide. Its primary goal is to provide a comprehensive one-stop Internet resource for plant health information.
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