EFFECT OF CERTAIN AQUEOUS INDIGENOUS PLANT EXTRACTS ON SUSCEPTIBILITY OF CUCUMBER PLANTS TO POWDERY MILDEW (SPHEROTHECA FULIGINEA) INFECTIONON | ||
| Journal of Plant Production | ||
| Article 18, Volume 31, Issue 8, August 2006, Pages 5093-5102 PDF (122.1 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2006.236114 | ||
| Author | ||
| E. l. El—Shafeey, | ||
| 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. | ||
| Keywords | ||
| Plant extract; mode of action; powdery mildow; cucumber plants | ||
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