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Ampaabeng Gyedu KYEREMEH Toshio KIKUMOTO Duen-yau CHUANG Yuichi GUNJI Yoshiyuki TAKAHARA Yoshio EHARA 《Journal of General Plant Pathology》2000,66(3):264-268
Two pathogenic strains of E. carotovora subsp. carotovora 2T-2 and TT-4 with high bacteriocin activity but low sensitivity to the bacteriocins of other strains were treated with ethyl
methane sulphonate (EMS). Two avirulent mutants A-f-39 and B-e-19 developed from 2T-2 and TT-4, respectively, by this treatment
had the same bacteriocin activity as their respective parents and inhibited the in vitro growth of pathogenic strains of this species. The disease control of these two mutant strains were compared in the field in
1995 and 1997 to the control by CGE234M403 (M403) (a commercialized biocontrol agent), a mixture of A-f-39 and M403, and an
agrochemical (basic dithianon-copper chloride). The protection obtained with A-f-39 was comparable to M403 and was better
than that with the chemical. The mixture of A-f-39 and M403 consistently gave the best results in all the field trials.
Received 17 September 1999/ Accepted in revised form 22 February 2000 相似文献
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