CONTROL OF GARDENIA LEAF SPOT AND BUD ROT DISEASES USING SOME NATURAL PLANT OILS. | ||||
| Journal of Plant Production | ||||
| Article 12, Volume 33, Issue 4, April 2008, Page 2659-2680 PDF (924.75 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2008.164907 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. A. Mostafa1; Effat A. Zaher1; A. H. El-Shaer2; Nour El-houda A. Reyad1 | ||||
| 1Plant Pathol. Dept., Fac. of Agric., Cairo Univ. | ||||
| 2Plant Pathol. Res. Inst., A.R.C., Giza | ||||
| Abstract | ||||
| This study was conducted to through light on the most important fungi affected gardenia (Gardenia jasmenoides Ellis) plant with leaf spot and bud rots diseases and the effect of some plant essential oils as safe management against these fungi in vitro and in vivo. Isolation trials from infected gardenia plant tacked from Giza governorate during 2005-2006 growing season revealed eleven fungal species related to eleven genera. The isolates were differed in there frequency depending on the infected plant part and the isolation periods, Botrytis cinerea, Alternaria alternata, Pestalotia langloissii and Cladosporium sp. Were the most dominant fungi. These four isolates were differed in there pathogenic capabilities depending on the infected plant part, B. cinerea was exhibited the highest percentage of rotted buds while A. alternata and P. langloissii were only infected the leaves. A. alternata was exhibited the highest disease severity. Among twenty plant essential oils tested in vitro, Cumin (Cuminum cyminum) oil was the most effective one, completely inhibited the mycelial growth of the tested fungi at 500 ppm. concentration or more, while Anise (Pimpinella anisum), Peppermint (Mentha piperita), Thyme (Thymus vulgaris), Clove (Syzigium aromaticum) and French basil (Ocimum basilicum) oils at concentrations ranging between 750 and 1000 ppm depending on the fungal species occupied the second position in this respect. In vivo studies with cumin oil individually or in mixture with anise or clove oils were showed the best treatment under artificial inoculation than under natural infection in reducing the disease incidence. Generally spraying gardenia plant by cumin oil at 2500 ppm. mixed with clove oil at 5000 ppm. concentration was the best treatment that significantly decreased the disease incidence under greenhouse conditions. | ||||
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