EFFECT OF SIX WOOD EXTRACTS FROM FAMILY MELIACEAE AGAINST Psammotermes hybostoma (DESNEUX) (ISOPTERA: RHIMOTERMITIDAE). B - EFFECT OF SPRING WOOD EXTRACTS | ||||
| Journal of Plant Production | ||||
| Article 13, Volume 3, Issue 10, October 2012, Page 2667-2678 PDF (514.99 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2012.85011 | ||||
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| Authors | ||||
| R. M. Mز Sayed1; Hoda M. Abdel Wahab2 | ||||
| 1Forestry Dept..Hort. Res. Ins. Agric. Res. Centre, Giza. | ||||
| 2Zoology Dept., Fac. of Sciences, Aswan Univ. | ||||
| Abstract | ||||
| This study was carried out to study the toxic effects of different wood spring extracts from certain woody trees belong to Family Meliaceae in spring against Psammotermes hybostoma at the Tropical Farm, Aswan Botanical Garden and Fac. of Science, Aswan Univ. during 2011 and 2012 seasons. The meliaceous trees chosen were Khaya senegalensis, K. ivorensis, Swietenia mahagoni, S. macrophylla, Azedarachta indica and Melia azedarach. Summarized results revealed that, S. mahagoni followed by K. ivorensis produced the highest values of total extracts while, M. azedarach and S. macrophylla produced the lowest values in the two seasons. Using water as a solvent produced the highest values of all wood extracts compared to the other solvents. Moreover, increasing concentrations up to 400 mg/l of the different spring wood extracts resulted in gradual increases in mortality percentage for the 3rd instars of termite. Using 350 ppm of either M. azedarach or K. ivorensis alcohol + benzene extracts caused the highest values of mortality percentage for P. hybostoma. On the other hand, spring wood extract by benzene alone from either M. azedarach or K. senegalensis at 350 ppm resulted in the most effective treatments on termite compared to the other treatments. According to LC 90 (350 ppm) values, results revealed that either alcohol + benzene extract or benzene extract alone of the tested trees was highly toxic to P. hybostoma 3rd instars worker. Meanwhile, according to LC 50 values using the lowest concentrations (75 and 100 ppm) of alcohol + benzene extract for M. azaderach and S. macrophylla, respectively led to toxic effect on P. hybostoma equal to the toxicity of other trees at the highest concentration. | ||||
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