Efficacy of biocontrol agents and natural compounds against powdery mildew of zucchini |
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Authors: | Giovanna Gilardi Michele Baudino Angelo Garibaldi Maria Lodovica Gullino |
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Institution: | (1) Centre of Competence for the Innovation in the Agro-environmental Sector (AGROINNOVA), University of Torino, 10095 Grugliasco, TO, Italy;(2) Consorzio di Ricerca e Sviluppo per l’Ortofrutticoltura Piemontese (CReSO), 12012 Boves, CN, Italy; |
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Abstract: | The activity of different types of natural compounds and of two biofungicides based on Bacillus subtilis and Ampelomyces quisqualis alone and in combination with fungicides was tested against powdery mildew of zucchini. The efficacy was compared to the
activity of fungicides used alone in four experimental trials carried out in the open field and under greenhouse conditions.
The Podosphaera xanthii population used throughout the work was partially resistant to azoxystrobin, whereas it was susceptible to mychlobutanil.
Sulphur plus terpenes and mustard oil consistently controlled powdery mildew, followed by mychlobutanil alone or in combination
with A. quisqualis. B. subtilis and A. quisqualis when tested alone were partially effective. The combination of azoxystrobin and B. subtilis only delayed the spread of the pathogen. |
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