John M. Young

Learn More
A study of representatives of the bacterial genus Pseudomonas, analysing a combined data set of four molecular sequences with completely different properties and evolutionary constraints, is reported. The best evolutionary model was obtained with a hierarchical hypothesis testing program to describe each data set and the combined data set is presented and(More)
Olive knot, caused by a pathogen or pathogens within the group of bacterial pathogens currently known as Pseudomonas savastanoi, is described. The ecology, transmission and methods of control of the pathogens are discussed. Strategies to minimise the effects of infection are recommended and these depend on attention to specific details in programs for(More)
A series of novel ω-(N,N,N-trialkylammonium)alkyl ester and thioester derivatives [RCOM(CH2) n NR 3 + X −, M = O or S, n = 2–6, X = I or Cl] of 11 nonsteroidal antiinflammatory carboxylic acid agents (naproxen, ketorolac, indomethacin, ibuprofen, sulindac, ketoprofen, flufenamic acid, mefenamic acid, zomepirac, etodolac, and tifurac) was prepared and(More)
The pathotype strain of Pseudomonas syringae pv, panici was examined using laboratory and pathogenicity tests. The strain is avirulent to Panicum miliaceum and therefore is unsuitable as the pathotype strain of the pathovar. The strain has affities with P. syringae pv. syringae but is not pathogenic to lilac. Because no other authentic, pathogenic strains(More)
The relative virulence of strains of Acidovorax avenae to their reported hosts was investigated. Strains of A. avenae subsp. avenae were more virulent to sweet com than to maize or sugarcane, and only weakly virulent or avirulent to oat. Passage of weakly virulent strains of subsp. avenae through sweet com did not affect strain virulence. A. avenae subsp.(More)
Sequence data for 16S rDNA of the type strains of Acidovorax avenae subsp. avenae, A. avenae subsp. cattleyae, A. avenae subsp. citrulli, A. konjaci and Herbaspirillum rubrisubalbicans were compared with GenBank library accessions of Burkholderiaspp., Comamonas sp., Ralstonia solanacearum and Variovorax sp. Maximum Parsimony analysis produced two clusters:(More)
Erwinia amylovora (the cause offireblight) and Pseudomonas syringae (the cause of bacterial blossomblightorbacterial blast)causesimilardieback symptoms in vegetative andflowering shoots of pearand applein spring(Jones andAldwinckle 1990). Thedie-back symptom, especially of inflorescences, is probably themost common expression of disease of both(More)
Production of nematode-based pesticides involves the recovery of a viable nematode life stage known as the infective juvenile (IJ) from fermentation broth. Waste components to be separated from the IJs include non-IJ life stages, dead nematodes, nematode debris, spent media, and the nematode's associated bacteria. This paper reports separation(More)
  • 1