Use of demethylation inhibiting fungicides (DMIs) for the control of onion white rot (Sclerotium cepivorumBerk.) in New Zealand
作者:
R. A. Fullerton,
A. Stewart,
E. A. Slade,
期刊:
New Zealand Journal of Crop and Horticultural Science
(Taylor Available online 1995)
卷期:
Volume 23,
issue 2
页码: 121-125
ISSN:0114-0671
年代: 1995
DOI:10.1080/01140671.1995.9513878
出版商: Taylor & Francis Group
关键词: Allium cepa;chemical control;dicarboximides;onion;procymidone;Sclerotium cepivorum;triazoles;tebuconazole;triadimenol;white rot
数据来源: Taylor
摘要:
The demethylation inhibiting (DMI) fungicides, tebuconazole and triadimenol, both of the triazole group, were evaluated for the control of white rot (Sclerotium cepivorumBerk.) on onion(Allium cepaL). Both fungicides, applied as foliar sprays, gave a high degree of white rot control, effecting reductions in disease of up to 85% ofthat in untreated plots. When applied as a soil surface spray immediately after sowing, tebuconazole provided a high level of protection all season. The greatest degree of control was obtained from a combination of seed treatment with procymidone (a dicarboximide fungicide), followed by foliar sprays of either procymidone, tebuconazole, or triadimenol. Tebuconazole was unsuitable for seed treatment, causing high seed and seedling mortality. For maximum control of white rot, a combination of seed treatment and foliar sprays should be used. The triazoles—tebuconazole and triadimenol are suitable alternatives to procymidone for foliar sprays.
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