El—Shafeey,, E. (2006). EFFECT OF CERTAIN AQUEOUS INDIGENOUS PLANT EXTRACTS ON SUSCEPTIBILITY OF CUCUMBER PLANTS TO POWDERY MILDEW (SPHEROTHECA FULIGINEA) INFECTIONON. Journal of Plant Production, 31(8), 5093-5102. doi: 10.21608/jpp.2006.236114
E. l. El—Shafeey,. "EFFECT OF CERTAIN AQUEOUS INDIGENOUS PLANT EXTRACTS ON SUSCEPTIBILITY OF CUCUMBER PLANTS TO POWDERY MILDEW (SPHEROTHECA FULIGINEA) INFECTIONON". Journal of Plant Production, 31, 8, 2006, 5093-5102. doi: 10.21608/jpp.2006.236114
El—Shafeey,, E. (2006). 'EFFECT OF CERTAIN AQUEOUS INDIGENOUS PLANT EXTRACTS ON SUSCEPTIBILITY OF CUCUMBER PLANTS TO POWDERY MILDEW (SPHEROTHECA FULIGINEA) INFECTIONON', Journal of Plant Production, 31(8), pp. 5093-5102. doi: 10.21608/jpp.2006.236114
El—Shafeey,, E. EFFECT OF CERTAIN AQUEOUS INDIGENOUS PLANT EXTRACTS ON SUSCEPTIBILITY OF CUCUMBER PLANTS TO POWDERY MILDEW (SPHEROTHECA FULIGINEA) INFECTIONON. Journal of Plant Production, 2006; 31(8): 5093-5102. doi: 10.21608/jpp.2006.236114
EFFECT OF CERTAIN AQUEOUS INDIGENOUS PLANT EXTRACTS ON SUSCEPTIBILITY OF CUCUMBER PLANTS TO POWDERY MILDEW (SPHEROTHECA FULIGINEA) INFECTIONON
Department of Agricultural Botany, Faculty of Agriculture, Kafr El- Sheikh Univ. Egypt.
Abstract
Concerning effects of the tested extracts on controlling the powdery mildew
disease caused by Sphaerolheca fuligi'nea on cucumber plants results indicate that,
the most effective extract for controlling the disease incidence was Narcissus sp.
which exerted efficacy of 37.7% against the disease incidence followed by
Chenopodium album which resulted in 19.17% efficacy The rest extracts ranged
between 0.0 to 8.5%, while the fungicide (Rubigan) reduced the disease incidence
with 62.61% efficacy. The results showed that germination of the fungal conidial
spores was partially inhibited by contacting to the tested extracts after 24 hours of
incubation, treatments with C. album, Narcissus sp. and the fungicide (Rubigan) were
the most effective against germination of the fungal conidial spores and decreased the
number of the germinated spores with 90% comparing to the control. Meanwhile, the
least effective extract was Conyza dioscoroides which exerted 50% efficacy. After 48
hours of incubation, the most suppressive treatments were with (ML-can), Narcissus
sp. and C. album which decreased the germinated spores with efficacy (90.42, 84.92
and 79.45%), respectively. However, the least effective extract on spore germination
was C. dioscoroides, which exerted only 15 05, efficacy.
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