Biological Control of Squash Downy Mildew under Field Conditions | ||
| Egyptian Journal of Phytopathology | ||
| Article 8, Volume 44, Issue 1, June 2016, Pages 99-112 PDF (249.33 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejp.2016.91928 | ||
| Authors | ||
| Safa Elwan* ; Nourjihan Mahmoud | ||
| Vegetable Plant Dis. Dept. Plant Pathol. Res. Inst., ARC, Egypt | ||
| Abstract | ||
| The effects of some microorganisms, e.g. Trichoderma harzianum (T1), T. viride, (T2) mixture of T1+T2, Bacillus subtilis and commercial biocide product namely Blight Stop were studied on the incidence and disease severity of downy mildew of squash caused by Pseudoperonospora cubensis under field conditions during two successive growing seasons (2013 and 2014). All the biocontrol agents tested caused significant reduction in both disease incidence and disease severity of downy mildew on the five tested squash cultivars. The lowest percentage of disease incidence was recorded on Blonky 180 cv. during the two successive growing seasons. Among the tested bioagents, B. subtilis treatment caused significant reduction in both disease severity and disease incidence during 2013. However, the commercial product Blight Stop was the best in this respect during season 2014. All bioagent treatments caused significant increases in some growth parameters, i.e. fruit number/plant, plant height and yield of fruits. | ||
| Keywords | ||
| Bacillus subtilis; biological control; downy mildew; Pseudoperonospora cubensis; squash and Trichoderma harzianum | ||
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