Applied approach for controlling powdery mildew disease of cucumber under plastic houses
2012
El-Naggar, M.A. (National Research Center, Giza (Egypt). Plant Pathology Dept.) | El-Deeb, H.M. (National Research Center, Giza (Egypt). Plant Pathology Dept.) | Ragab, S.S. (Plant Pathology Research Inst., Giza (Egypt))
The efficiency of some biocides resistance and a systemic fungicide were evaluated on suppressing of sphaerotheca fuliginea as well as controlling powdery mildew of cucumber under plastic house conditions. Different degrees of reduction in powdery mildew occurred when the tested biocides, i.e. Trichoderma viride, Amplomyces quisqualis, pseudomonas fluroscens, Bacillus subtilis, candida tennis and Tilleliopsis pallescens and the systemic fungicide, pyrazophos 12% (Afugan) were used. The systemic fungicide was more efficient than biocides. Spraying cucumber plants with the tested biocides and fungicide for three times at 10-15 days intervals reduced significantly the percentage of infected plants, number of infected leaves and the severity of powdery mildew as well as increased the yield (Kg/ per plant) compared with control treatment. On the other hand, spraying cucumber plants under plastic house during growing season with any of the fungicide or each of biocides alone resulted in a significant decrease in the severity of the disease with significant increment in the cucumber yield compared with the control treatment. In addition, Ampelomyces quisqualis and Tilleliopsis Pallescens gave the best results to control powdery mildew.
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