ORIGINAL ARTICLE
First report of powdery mildew caused by Podosphaera xanthii on Luffa cylindrica in Egypt and its control
1
Department of Plant Pathology, National Research Center, Dokki, Egypt
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Submission date: 2020-01-17
Acceptance date: 2020-03-11
Online publication date: 2020-08-31
Corresponding author
Journal of Plant Protection Research 2020;60(3):311-319
KEYWORDS
TOPICS
ABSTRACT
Luffa cylindrica M. Roem, is commonly called sponge gourd or Egyptian cucumber. In
September 2018, several plants showing symptoms of powdery mildew were observed in
some fields at different locations in Egypt. Identification and pathogenicity tests indicated
that the causal fungus of powdery mildew disease of Luffa cylindrica was Podosphaera xanthii.
Results of surveyed luffa plants grown at different field localities of northern Egypt,
for powdery mildew disease incidence revealed that the maximum record (57.33%) of disease
occurrence was recorded in some fields belonging to Beheira governorate followed by,
Alexandria and Sharqia (53.67% and 48.00%, respectively). Meanwhile, fewer occurrences
were observed in Kafer El-Sheekh governorate (45.33%). We applied biocontrol agents as
a foliar spray against powdery mildew in vitro and under field conditions. The effects of
some essential oils, organic acid and bioproducts were also studied. All treatments significantly
reduced P. xanthii compared to untreated plants. Chaetomium globosum and Saccharomyces
cerevisiae alone or grown on rice straw and/or bagas showed highly reduced
disease incidence compared to the other treatment. From the present study it could be
suggested that the usage of biocontrol formulated on rice straw might be used as an easily
applied, safe and cost effective control method against powdery mildew diseases.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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