Articles
EFFICACY OF ANTAGONISTIC BACTERIA FOR CONTROL OF FIRE BLIGHT ON APPLE
Article number
411_60
Pages
299 – 302
Language
Abstract
Strains of Pseudomonas fluorescens (Pf A-506 and LE-15) and Erwinia herbicola (Eh 318), bacterial antagonists to Erwinia amylovora, were evaluated for efficacy against fire blight infections in ‘Rome Beauty’ apple blossoms in 1994 at Biglerville, PA. Eh 318 significantly reduced incidence of fire blight in blossom clusters atomized with a bacterial suspension of 1 x 108 cfu/ml at 20% and 100% bloom and challenged inoculated 24 hr later with the pathogen E. amylovora at 1 x 105 cfu/ml.
Compared to the no antagonist but pathogen-inoculated treatment, Eh 318 provided 65% control of fire blight on blossom clusters under conditions highly favorable for rapid blossom development (mean daily temp. 20.5°C) between the Pink and Full-bloom stages.
The level of control provided by this antagonist was equal to streptomycin used at 80 mg/L. The Pf A-506 and Pf LE-15 treatments did not significantly reduce incidence of fire blight under the conditions of this test.
Compared to the no antagonist but pathogen-inoculated treatment, Eh 318 provided 65% control of fire blight on blossom clusters under conditions highly favorable for rapid blossom development (mean daily temp. 20.5°C) between the Pink and Full-bloom stages.
The level of control provided by this antagonist was equal to streptomycin used at 80 mg/L. The Pf A-506 and Pf LE-15 treatments did not significantly reduce incidence of fire blight under the conditions of this test.
Publication
Authors
K.D. Hickey, T. van der Zwet
Keywords
Online Articles (87)