Effectiveness of fungicides and mineral oils against squash powdery and downy mildew

Document Type : Original Article

Author

Pesticide Chemistry Department, Faculty of Agriculture (Chatby). Alexandria University.

10.21608/jpces.2003.459459

Abstract

The curative efficacy of five commercially fungicides (Narimol, Penconazole, Pyrazophos, Pyrifenox, and Thiophenate-methyl) and two mineral oils (Kabel, KZ) alone and their combination against powdery and downy mildew of winter squash under field condition was carried out. The experiment was conducted in two years 2001 and 2002 winter seasons at the Agricultural Research experimental station of Faculty of Agriculture, Alexandria University, Abbis area. The data were recorded as percentage of infected leaves (IL), disease index (DI), relative disease control (RDC), polyphenol content, and squash yield. The result revealed that use the mineral oils in the combination with fungicides support the use of fungicides against powdery and downy mildew. Pyrazophos by half recommended dose with 1% mineral oil (kabel) gave good curative effort against powdery mildew of squash plant more than its recommended dose alone. While against downy mildew pyrifenox by its half-recommended dose with 1% KZ oil was the superior. Polyphenol content of squash plants was affected in the old leaves than in the young one, and the squash yield was enhanced by more than 200%.

Keywords

Journal of Pest Control and Environmental Sciences
Volume 11, Issue 2
December 2003
Pages 36-79

Files

Share

How to cite

Statistics