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Studies on the fungicidal control of bulb rot caused by botrytis allii in onions for the production of seeds
Year:
1983
Authors :
Kritzman, Giora
;
.
Volume :
100
Co-Authors:
Kritzman, G., Division of Plant Pathology, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Facilitators :
From page:
519
To page:
525
(
Total pages:
7
)
Abstract:
Botrytis allii, grey mould, is the major cause of bulb and seed yield losses of growing onion seeds in Israel. Nursery treatments with iprodione or vinclozolin significantly decreased the number of diseased onion bulbs which were supplied to the farmers from 24 % in the control to 8 % in the treated plots and resulted in higher yield of seed with increases of 45 % in seed weight per plant. Onion bulbs under non-irrigated conditions in the mountains were found to be more susceptible to the disease, as well as to secondary infection, than irrigated onions that were grown in the plains. Chemical treatment of the bulbs before planting significantly reduced the rate of secondary infection in the field and decreased seed losses. The survival of B. allii propagules and their importance as a primary source of inoculum in growing onions for seed were studied in the central mountainous region of Israel. From 197 to 1532 B. allii propagules per g soil were found in the field plots, this as the result of only one season growing onion seed. Ninety-one per cent of the total planted healthy bulbs were infected in the highly contaminated plots after 150 growing days. The surviving B. allii propagules reduced the seed yield from 14.4 in the less contaminated plots to 10.4 g/plant in the highly contaminated. © 1983, Cambridge University Press. All rights reserved.
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DOI :
10.1017/S0021859600035267
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
24521
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:08
Scientific Publication
Studies on the fungicidal control of bulb rot caused by botrytis allii in onions for the production of seeds
100
Kritzman, G., Division of Plant Pathology, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Studies on the fungicidal control of bulb rot caused by botrytis allii in onions for the production of seeds
Botrytis allii, grey mould, is the major cause of bulb and seed yield losses of growing onion seeds in Israel. Nursery treatments with iprodione or vinclozolin significantly decreased the number of diseased onion bulbs which were supplied to the farmers from 24 % in the control to 8 % in the treated plots and resulted in higher yield of seed with increases of 45 % in seed weight per plant. Onion bulbs under non-irrigated conditions in the mountains were found to be more susceptible to the disease, as well as to secondary infection, than irrigated onions that were grown in the plains. Chemical treatment of the bulbs before planting significantly reduced the rate of secondary infection in the field and decreased seed losses. The survival of B. allii propagules and their importance as a primary source of inoculum in growing onions for seed were studied in the central mountainous region of Israel. From 197 to 1532 B. allii propagules per g soil were found in the field plots, this as the result of only one season growing onion seed. Ninety-one per cent of the total planted healthy bulbs were infected in the highly contaminated plots after 150 growing days. The surviving B. allii propagules reduced the seed yield from 14.4 in the less contaminated plots to 10.4 g/plant in the highly contaminated. © 1983, Cambridge University Press. All rights reserved.
Scientific Publication
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