Preventive and Curative Biological Treatments for Control of Botrytis cinerea Stem Canker of Greenhouse Tomatoes

BioControl ◽  
2006 ◽  
Vol 51 (3) ◽  
pp. 363-373 ◽  
Author(s):  
R. S. Utkhede ◽  
S. Mathur
Keyword(s):  
Botrytis Cinerea ◽  
Stem Canker ◽  
Biological Treatments ◽  
Greenhouse Tomatoes

Biological control of stem canker of greenhouse tomatoes caused by Botrytis cinerea

2002 ◽  
Vol 48 (6) ◽  
pp. 550-554 ◽  
Author(s):  
R S Utkhede ◽  
S Mathur
Keyword(s):  
Biological Control ◽  
Botrytis Cinerea ◽  
Stem Canker ◽  
Fruit Yield ◽  
The Other ◽  
Post Inoculation ◽  
Tomato Plants ◽  
Grey Mold ◽  
Rhodosporidium Diobovatum ◽  
Greenhouse Tomatoes

Experiments were conducted to study the effect of various chemical and biological agents on stem canker caused by Botrytis cinerea Pers.: Fr. on tomato plants grown in sawdust under near-commercial greenhouse conditions. Lesion lengths following treatment with RootShield® and strain S33 of Rhodosporidium diobovatum Newell & Hunter, applied as post-inoculation sprays, were significantly smaller than those in inoculated controls. These treatments also increased fruit yield and decreased the number of dead plants compared with inoculated controls. Decree®, Prestop®, and R. diobovatum S33, applied as sprays, prevented the occurrence of stem canker and increased fruit yield in tomato. The number of dead plants was also smaller with these treatments than with the other treatments and in inoculated controls. These results suggest that, in tomato, post-inoculation sprays of RootShield® and R. diobovatum S33 can reduce lesion lengths, and that a preventive spray of Decree®, Prestop®, and R. diobovatum S33 might prevent stem canker, under near-commercial greenhouse conditions.Key words: biological control, Botrytis cinerea, Bacillus subtilis, Rhodosporidium diobovatum, grey mold.

scholarly journals Stem Canker of Cabbage Seed Stalks Caused by Botrytis cinerea in Western Washington

Plant Disease ◽  
2001 ◽  
Vol 85 (5) ◽  
pp. 559-559
Author(s):  
D. Inglis ◽  
M. Derie ◽  
T. Hsiang
Keyword(s):  
Brassica Oleracea ◽  
Botrytis Cinerea ◽  
Mechanical Damage ◽  
Tween 80 ◽  
Stem Canker ◽  
The United States ◽  
Gray Mold ◽  
Freezing Injury ◽  
Razor Blade ◽  
Western Washington

Stem cankers were observed during 1998 on bolting stalks of cabbage (Brassica oleracea var. capitata L.) in seed production fields in western Washington. In 1999, approximately 4 ha of cabbage hybrid 'Wk 121, was severely affected. Lesions occurred at the base of seed stalks after they emerged from heads of plants overwintered in the field, or on flower branches and seed-bearing stalks that developed during the growing season. Lesions girdled a branch or stalk, and killed or weakened it so that it broke during pod fill. Isolates of Botrytis cinerea Pers.:Fr. were obtained by plating spores from lesions onto potato dextrose agar. To confirm pathogenicity, stems of 12-day-old seedlings of ‘Wk 121’ were scraped with a razor blade or left intact, atomized with sterile 0.01 % Tween 80 or a suspension of Botrytis cinerea at 1.0 × 106 conidia/ml, and kept at 20°C in a dew chamber in plastic bags. The fungus was reisolated from small lesions on wounded stems inoculated with B. cinerea after 3 days. No lesions developed on non-wounded or wounded control plants. B. cinerea is reported to cause storage rot of cabbage (2) and gray mold on Brassica oleracea L. (cabbage, kale, kohlrabi, wild cabbage) in Washington (1) but not stem canker. This new seed crop disease may be the result of predisposition to infection by freezing injury or mechanical damage on a highly susceptible cultivar grown under cool, wet weather. References: (1) D. F. Farr et al. 1989. Fungi on Plants and Plant Products in the United States. American Phytopathological Society. St. Paul, MN. (2) O. C. Yoder and M. L. Whalen. Can. J. Bot. 53:691, 1975.

scholarly journals Resistance to dicarboximide and benzimidazole fungicides in Botrytis cinerea from greenhouse tomatoes in New Zealand

2009 ◽  
Vol 62 ◽  
pp. 401-401 ◽  
Author(s):  
P.J. Wright ◽  
S. Chng ◽  
R.E. Beever ◽  
J. Thompson
Keyword(s):  
New Zealand ◽  
Botrytis Cinerea ◽  
Fungal Growth ◽  
Benzimidazole Fungicides ◽  
Greenhouse Tomato ◽  
Agar Media ◽  
Resistant Strains ◽  
Auckland Region ◽  
Dicarboximide Resistance ◽  
Greenhouse Tomatoes

Isolates from Botrytis cinerea collected from greenhouse tomato crops throughout New Zealand were tested for resistance to the dicarboximide fungicide vinclozolin and the benzimidazole fungicide carbendazim by assessing fungal growth on agar media amended with the fungicides (100 ppm active ingredient for both fungicides) Benzimidazole resistant strains of B cinerea were found on 15 of the 18 properties examined and dicarboximideresistant strains were found on 11 properties Dicarboximide resistance was more prevalent in the Auckland region with 71 of isolates resistant compared to 5 of isolates resistant for the other three regions All of the strains that were resistant to dicarboximide were also resistant to benzimidazole The high levels of dicarboximide resistant strains in the Auckland region correspond to reported loss of fungicide efficacy and loss of disease control in some greenhouses in this region

First report on the use of moderately halophilic bacteria against stem canker of greenhouse tomatoes caused byBotrytis cinerea

2007 ◽  
Vol 57 (3) ◽  
pp. 337-339 ◽  
Author(s):  
Najla Sadfi-Zouaoui ◽  
Badiâa Essghaier ◽  
Ibtissem Hannachi ◽  
Mohamed Rabeh Hajlaoui ◽  
Abdellatif Boudabous
Keyword(s):  
Halophilic Bacteria ◽  
Stem Canker ◽  
Moderately Halophilic ◽  
First Report ◽  
Greenhouse Tomatoes ◽  
Moderately Halophilic Bacteria
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