Efektywność wybranych mikroorganizmów w ograniczaniu zakażenia sadzonek winorośli przez Phomopsis viticola Sacc. [Effectiveness of some microorganisms in the limitation of grapevine cuttings infection by Phomopsis viticola Sacc.]

The possibilities of using antagonistic fungi and bacteria in the limitation of grapevine stems infection by Phomopsis viticola Sacc. were studied. Trichodema koningii Oud., T. viride Persoon ex S.F., T. harzianum Rifai, Gliocladium catenulatum Gilman and Abbott, G. fimbriatum Gilman and Abbott, Bacillus sp., Pseudomonas fluorescens and five unidentified isolates of bacteria i.e.: 22a, 35, 40, 45, 66 were estimated. It was appeared what Trichoderma spp. were the most effective in protection of grapevine stems against the infection by P. viticola. After these antagonistic fungi were used on protected grapevine canes not numerous necrosis were observed and few cultures of pathogen were reisolated from them. Moreover, Trichoderma spp. survived on the grapevine stems during the period of experiment. The abilities of other microorganisms tested to protect grapevine cuttings against P. viticola infection and to exist on the stems were less than Trichoderma spp