IMPACT OF CERTAIN PLANT OILS ON Meloidogyne incognita INFECTING OKRA PLANT

Refaei, A. R.

doi:10.21608/jppp.2009.122779

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	IMPACT OF CERTAIN PLANT OILS ON Meloidogyne incognita INFECTING OKRA PLANT
Article 11, Volume 34, Issue 3, March 2009, Page 2253-2260 PDF (425.67 K)
Document Type: Original Article
DOI: 10.21608/jppp.2009.122779
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Author
A. R. Refaei^*
Nematology Res. Unit, Agricultural Zoology Dept., Fac. Agric., Mansoura Univ., Egypt
Abstract
Eight essential oils i.e. almond, carnation, castor, chamomile, eucalyptus, garlic, lupine and sesame in comparison with oxamyl were used in controlling the root-knot nematode, Meloidogyne incognita infecting okra. The trial was carried out in plastic pots under greenhouse conditions. Results illustrated that the tested plants oils remarkabley reduced root galling and eggmasses of M. incognita on okra as well as improved plant growth parameters to various degrees. Among plant oils tested, garlic treatment accomplished the highest values in improving plant growth parameters which averaged 47.8, 71.7 and 105.5% for plant length, total plant fresh weight and shoot dry weight, followed by sesame application with values of 39.7, 52.1 and 61.1% and then castor treatment with values of 39.7, 50.0 and 61.1% for the same plant criteria, whereas, the least values was recorded by chamomile oil that averaged 3.1, 16.3 and 5.5%, respectively, as compared to nematode alone. Moreover, sesame oil surpassed over tested plant oils in eliminating root galls (70.5%) and eggmasses (84.0%) of M. incognita on okra roots, followed by garlic oil (69.2 & 84.0%), lupine oil (68.8 & 84.0%) and then castor oil (50.9 & 84.0%), whereas, eucalyptus oil gave the least values for these two nematode criteria (12.5 & 43.0%), respectively. Oxamyl also improved plant growth parameters and gave 100.0% reduction in nematode criteria
Keywords
Essential plant oils; Meloidogyne incognita; okra; oxamyl


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