الفهرس 
Phytoalexin productionOnly 14 pages are availabe for public view
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Abstract
The present study aimed to control the tomato wilt disease caused by Fusariurn oxysporum f. sp. lycopersici and Pseudomonas solanacearum using the effectiveness of herbicides and / or antagonistic microorganisms , involving agents which activate the natural defense mechanisms of non - infected and infected plants . Therefore , single application of a herbicide ( pendimethalin , diphenamid and metribuzin ) or one antagonistic Streptomvces sp. (S. corchorusii or S. mutabilis ) and combinations of a herbicide and an antagonism or both were tested to assess their inhibitory activity on the growth of Fusarium oxysporum and Pseudomonas solanacearum in vitro and in vivo .The effect of herbicides on the antagonists in vitro was also studied . The effects of the herbicides ; pendimethalin and metribuzin , in combination with antagonists Stre~tomvcesc orchorusii or / and Stre~tomycesm utabilis on the development of biochemical defences , especially the accumulation of the phytoalexin tomatine in tomato ersicon esculentum ) for controlling the tomato wilt disease in sterilized and non - sterilized soils were studied . The parallel effects of treatments on tomato growth were examined . The effect of crude extract of tomatine from all treatments onthe growth of F. oxysporum and P. solanacearum on defined media was also examined The results showed that the tested herbicides inhibited the growth of F. oxvsporurn and P. solanacearum on solid and in liquid media . The inhibitory effect was propor- - tional to the herbicide concentration with pendimethalin being more effective than diphenamid and metribuzin and maximum inhibition was at 2.0 x 10-3 M , and P. solanaceanun was the most sensitive pathogen