01507cab a2200229Ia 45 0 u198418 SIRSI 120228s2005 ua ss b eng d EAL ART EJAR V83 No3 SI 10 Kelany, Ibrahim M. Egyptian journal of agricultural research, 2005 v. 83 (3) , Special issue [electronic resource]: The Third International Conference of Plant Protection Research Institute: 26-29 November 2005. Study on some plant extracts and their formulations as save, alternative and bio- control measures for certain insect pests [electronic resource]. p.949-960. Includes references. The conventional pesticides caused for the time being many problems, some of which the appearance of highly resistant strains of numerous pests, deleterious effects on the environment. At the same time such pesticides are expensive to export for developing poor countries with limited foreign currency. Therefore, the search for bio-active substances which have satisfactory properties concerning their effects on the target pests, not expensive to produce and also environmental safety is nowadays very urgent and not later on. Pests Biological control. Plant extracts. Egyptian Journal of Agricultural Research. 2005.v.83(3),SI 1110-6336 nnas u158585 http://nile.enal.sci.eg/EALE/2005/EJAR/8305/3si/949.pdf Full Text Article. 1 AR lcc 51273 51273