PLANT EXTRACT USING ON CONTROL OF SOFT ROT DISEASE ON POTATOES FOR REASONED PATIENTS Erwinia carotovora var carotovora L

	PLANT EXTRACT USING ON CONTROL OF SOFT ROT DISEASE ON POTATOES FOR REASONED PATIENTS Erwinia carotovora var carotovora L
Euphrates Journal of Agriculture Science
Article 1, Volume 6, Issue 2, 2014, Pages 232-241
Abstract
Abstract : The Survey process Was Conducted in different periods during Spring months ,2002. The infection percentages ranged from 3 to 19%.Erwinia Caroto . isolations that had been taken from these four Storages were identified and had been found that this bacteria was responsible for making this disease inside these storages. Many isolated bacteria that belong to both genus and species were grown at potato dextrose agar (PDA) and McConkey medium . The factors affected the pathogenic ability of Erwinia Caroto . were : temperature , humidity , potato sensitivity , potato wounding and pollution , and the time between wounding and the hading wounds The Study showed that the period 15 days was the best period of heeding wounds when the temperature was 21co at infection volume 5.9ml .Diamont Variety was more sensitive than Desiree variety to be infected by Erwinia Caroto . bacteria .Ethanalic (95%) and bexanic extracts of Blue gum , Black seed , Clovetree , and thyme plants were tested by using paper discs diffusion assay method this shady showed that there was significant increase in inhibition of bacteria from the using hexanic Clovetree extract , 5000 Mgldise Compare with the other plant extracts used . Significant increase of hexanie clovetree extract and ethonolie clovetree extract had been met 100. the ared of bacterial inhibition by paper discs assay were 38 and 22ml , respectively . Hexanic Clovethee extract showed significant increase in bacterial inhibition Compare to antibiotic Agromycine using the same methed of test . the area of bacterial inhibition were 38 and 21ml , respectively

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