The effect of some physical and chemical agents and both extracts of Colocynth fruits and Pomegranate peels on the growth of the fungus Alternaria alternata that isolated from Tomato in markets domestic in Alnajaf Alashref

	The effect of some physical and chemical agents and both extracts of Colocynth fruits and Pomegranate peels on the growth of the fungus Alternaria alternata that isolated from Tomato in markets domestic in Alnajaf Alashref
Magazine of Al-Kufa University for Biology
Article 1, Volume 2, Issue 2, 2010, Pages 129-141
Abstract
The study included test the effect of some physical and chemical agents as well as evaluating the efficiency of a number of plant extracts in the growth of fungus Alternaria alternata that causes black mold disease isolated from tomato fruits . The results of laboratory experiments showed that the optimal degree of temperature for growth of the fungus A.alternata was 25 and 30 cº , where the range of colony diameter reached 7.1 and 7 cm respectively at 7days of incubation period , with significantly different from the other temperature . The results show that the best culture media for cultivation growth is Malt extract agar medium M.E.A and the range of fungal colony 7.5 cm . The results show that the sodium chloride different effects on the experimented fungus growth . The low concentrations are caused inhibition of the fungus where the rate of inhibition percentage reached 35.4% in concentration 0.1% , while high concentration had a positive effect to increase the growth of the experimental fungus . On the other hand it showed that the general extract of Colocynth seeds and Pomegranate peels give efficiency inhibition to the growth of fungus A.alternata where the inhibition percentage reached 76.37% and 75.01% in the concentration for general extract of Colocynth seeds and Pomegranate peels respectively . While did not show significant differences in the sensitivity of the experiment fungus for the extract type .

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