Colonization Ability and Effect on Ginger Bacterial Wilt of Endophyte SZ-1

Endophyte SZ-1which had a strong inhibition on Ralstonia solanacearum was screened from disease-free root ginger;colonization dynamics of SZ-1marked with Rifampicin on the rhizosphere of ginger was investigated;control effect of SZ-1fermentation broth on ginger bacterial wilt was illustrated.The results showed strain SZ-1had inhibitation on six pathogen including Pesudmonas solanacearum Smith,Erwinia carotovora var.carotovora,Xanthomonas oryzae pv.Oryzae etc.in varying degree.The amount of SZ-1on the rhizosphere of ginger went up first and droped later,which remained 4.6×10 5 cfu / g fifty days after inoculation.The incidence of ginger bacterial wilt was 23.47%and the disease index was 12.56thirty days after inoculation,while they were respectively 89.63%and 31.52in the control.The relative control effect was 60.15%.