Inhibition of Criconemella xenoplax egg hatch by Pseudomonas aureofaciens

Nine fluorescent pseudomonad strains and one strain each of Escherichia coli and Rhizobium fredii were tested for potential to inhibit Criconemella xenoplax egg hatch. One strain, Pseudomonas aureofaciens BG33, and its genetically modified derivative, BG33CL1R, effectively inhibited egg hatch at 2.0...

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Bibliographic Details
Published inPhytopathology Vol. 83; no. 11; pp. 1245 - 1249
Main Authors Westcott, S.W, Kluepfel, D.A
Format Journal Article
LanguageEnglish
Published St. Paul, MN American Phytopathological Society 01.11.1993
Subjects
Biological and medical sciences
Biological control
Control
CONTROL BIOLOGICO
CONTROL DE NEMATODOS
CRICONEMELLA
ECLOSABILIDAD DEL HUEVO
ECLOSABILITE
ESCHERICHIA COLI
Fundamental and applied biological sciences. Psychology
INFECCIONES POR NEMATODOS
INHIBICION
INHIBITION
Invertebrates
LUTTE ANTINEMATODE
LUTTE BIOLOGIQUE
MATEMATICAS
MATHEMATIQUE
MODELE MATHEMATIQUE
MODELOS MATEMATICOS
NEMATODOSE
Phytopathology. Animal pests. Plant and forest protection
Protozoa. Invertebrates
PRUNUS PERSICA
PSEUDOMONAS
RHIZOBIUM
Pseudomonadales
Laboratory study
Bioassay
Egg
Hatching
Biological control
Escherichia coli
Pseudomonas aureofaciens
Pest
Phytophagous
Rhizobacteria
Microbiological control
Criconemella xenoplax
Helmintha
Bacteria
Pseudomonadaceae
Pseudomonas chlororaphis
Nemathelminthia
Antagonist
Inhibition
Invertebrata
Nematoda
Enterobacteriaceae
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Summary:Nine fluorescent pseudomonad strains and one strain each of Escherichia coli and Rhizobium fredii were tested for potential to inhibit Criconemella xenoplax egg hatch. One strain, Pseudomonas aureofaciens BG33, and its genetically modified derivative, BG33CL1R, effectively inhibited egg hatch at 2.0 X 10(8) cfu ml-1. Strain BG33CL1R inhibited egg hatch by 5, 50, and 95% when present at 1.0 X 10(7), 4.8 X 10(7), and 2.4 X 10(8) cfu ml-1, respectively. Eggs were sensitive to BG33CL1R from the time of deposition until second-stage juveniles were formed inside eggs 6.5 days later. In contrast, activity of second-stage juveniles and adults did not appear to be affected by incubation in BG33CL1R for up to 2 wk. Seven strains of P. aureofaciens and one strain each of E. coli, P. chlororaphis, and R. fredii did not inhibit egg hatch in similar tests. Therefore, general septic conditions apparently are not responsible for egg kill. The potential for P. aureofaciens BG33 and BG33CL1R to kill C. xenoplax eggs could explain in part their suppression of nematode population increase in greenhouse tests
Bibliography:H10
9447393
ISSN:0031-949X
1943-7684
DOI:10.1094/phyto-83-1245