Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/12884
Research center of Embrapa/Collection: Embrapa Meio Ambiente - Artigo em periódico indexado (ALICE)
Date Issued: 1997
Type of Material: Artigo em periódico indexado (ALICE)
Authors: BETTIOL, W.
GARIBALDI, A.
MIGHELI, Q.
Additional Information: WAGNER BETTIOL, CNPMA; ANGELO GARIBALDI, UNIVERSITA DEGLI STUDI DI TORINO; QUIRICO MIGHELI, UNIVERSITA DEGLI STUDI DI TORINO.
Title: Bacillus subtilis for the control of powdery mildew on cucumber and zucchini squash.
Publisher: Bragantia, Campinas, v.56, n.2, p.281-287, 1997.
Language: en
Keywords: Resistance
Tilletiopsis spp
Cladosporium sp
Verticillium lecanii
Acremonium alternatum
Métodos de controle
Fungicidas
Inimigos naturais.
Description: Application of concentrated metabolites of Bacillus subtilis - CMBS - (5,000 ug/mL) one and 24 h before or after inoculation of Sphaerotheca fuliginea (3 x 10 4 conidia/mL) reduced the number of lesions on cucumber leaves by 90-99%. The average number of lesions on control plants was 16.7 per leaf. A wettable powder product formulated with cells (10%) and metabolites (10%) of B. subtilis (WPBS), and CMBS sprayed on cucumber plants (1,000 ug/mL and 10,000 ug/mL) twice a week totally controlled powdery mildew. In the control treatment, 18 days after the first spray, the percent leaf surface covered by lesions was 99.0 and 46.7%, on the cotyledonary and expanded leaves, respectively. In the control treatment, 30 days after the first spray, the percent leaf surface with lesions was 26.1%, while leaves sprayed with CMBS presented no lesions. The fresh weight per plant was 4.3 g in the control treatment; 12.2 g, and 10.2 for plants sprayed with CMBS at the concentration of 1,000 and 10,000 ug/mL, respectively; and 9.7 g and 10.1 g for plants sprayed with WPBS 1,000 and 10,000 ug/mL, respectively. For zucchini squash, CMBS (5,000 ug/mL) sprayed every 2,4, and 6 days showed reductions in lesioned leaf surface of 100.0,98.3, and 94,7%, respectively.
Thesagro: Controle Biológico
Resistência.
NAL Thesaurus: Ampelomyces quisqualis
control methods
biological control
fungicides
natural enemies.
Data Created: 1998-05-13
Appears in Collections:Artigo em periódico indexado (CNPMA)

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