@article{cartwright_benson_1995, title={BIOLOGICAL-CONTROL OF RHIZOCTONIA STEM ROT OF POINSETTIA IN POLYFOAM ROOTING CUBES WITH PSEUDOMONAS-CEPACIA AND PAECILOMYCES-LILACINUS}, volume={5}, ISSN={["1090-2112"]}, DOI={10.1006/bcon.1995.1029}, abstractNote={Abstract A strain of Pseudomonas cepacia (ex Burkholder) Pallerni and Holmes, strain 5.5B, and an isolate of Paecilomyces lilacinus (Thom) Samson, isolate 6.2F, were evaluated for biocontrol of Rhizoctonia stem rot of poinsettia in polyfoam rooting cubes after preliminary screenings of collected bacteria, fungi, and actinomycetes. In repeated experiments conducted over 2-week periods, no disease developed on cuttings in cubes treated with P. cepacia as opposed to the nontreated, pathogen-infested controls (73 to 100% infection). Control with P. lilacinus was less effective but remained significant compared to the pathogen-infested controls. During 3-week trials, some infection (18%) occurred on cuttings in cubes treated with P. cepacia but the level of infection was significantly less than that in the pathogen-infested controls (100% infection). The P. lilacinus isolate provided similar levels of stem rot control over 2- and 3-week periods. Root development on poinsettia cuttings typically was not affected by P. cepacia but, in some experiments, was less on cuttings in cubes treated with P. lilacinus. These experiments demonstrate the significant potential of these antagonists as biocontrol agents for Rhizoctonia stem rot of poinsettia. P. lilacinus has not been previously reported as an antagonist of R. solani.}, number={2}, journal={BIOLOGICAL CONTROL}, author={CARTWRIGHT, DK and BENSON, DM}, year={1995}, month={Jun}, pages={237–244} } @article{cartwright_spurr_shew_1995, title={COMMERCIAL POTTING MEDIUM AS THE SOURCE OF PYTHIUM CAUSING A DISEASE ON TOBACCO TRANSPLANTS}, volume={79}, ISSN={["0191-2917"]}, DOI={10.1094/PD-79-0538A}, number={5}, journal={PLANT DISEASE}, author={CARTWRIGHT, DK and SPURR, HW and SHEW, HD}, year={1995}, month={May}, pages={538–538} } @article{cartwright_benson_1995, title={COMPARISON OF PSEUDOMONAS SPECIES AND APPLICATION TECHNIQUES FOR BIOCONTROL OF RHIZOCTONIA STEM ROT OF POINSETTIA}, volume={79}, ISSN={["0191-2917"]}, DOI={10.1094/PD-79-0309}, abstractNote={Pseudomonas cepacia (strain 5.5B) was compared with other strains of P. cepacia, P.fluorescens, P. chlororaphis, and P. aureofaciens for biocontrol of Rhizoctonia stem rot of poinsettia caused by Rhizoctonia solani in polyfoam rooting cubes. Over a 2-wk period, complete control (0% infection) of stem rot was achieved with P. cepacia, strain 5.5B. With other strains of P. cepacia, infection ranged from 0 to 93%. Infection ranged from 63 to 97% with all other strains of Pseudomonas spp. Different application methods for delivering strain 5.5B for stem rot control were tested. Rooting cubes soaked with a suspension of strain 5.5B or cubes soaked with a bacterial suspension followed by a bacterial spray over-the-top of cuttings (at day 0) were the most effective application methods. Cubes soaked with water followed by a bacterial spray over-the-top of the cuttings in cubes controlled (P = 0.05) stem rot compared with the control. Three spray applications of P. cepacia strain 5.5B to cuttings during a 2-wk period were more effective than either one or two bacterial sprays in control of Rhizoctonia stem rot. Spraying poinsettia stock plants with a suspension of strain 5.5B prior to taking cuttings, or dipping cutting stems in a bacterial suspension prior to placing cuttings in cubes, provided no stem rot control}, number={3}, journal={PLANT DISEASE}, author={CARTWRIGHT, DK and BENSON, DM}, year={1995}, month={Mar}, pages={309–313} } @article{cartwright_benson_1995, title={OPTIMIZATION OF BIOLOGICAL-CONTROL OF RHIZOCTONIA STEM ROT OF POINSETTIA BY PAECILOMYCES-LILACINUS AND PSEUDOMONAS-CEPACIA}, volume={79}, ISSN={["0191-2917"]}, DOI={10.1094/PD-79-0301}, abstractNote={Effects of antagonist concentration, nutrient status, and antagonist-free preparations (culture filtrate) of Paecilomyces lilacinus (isolate 6.2F) and Pseudomonas cepacia (strain 5.5B) on control of Rhizoctonia stem rot of poinsettia in polyfoam rooting cubes were investigated. Infection of cuttings ranged from 27 to 83% in cubes soaked in log 7.4 to log 3.4 conidia per milliliter of P. lilacinus. Percent infection of cuttings ranged from 0 to 56% in rooting cubes treated with P. cepacia applied in concentrations from log 9.4 to log 5.4 cfu per milliliter. Infection of cuttings in infested controls ranged from 87 to 93%. No significant differences in biocontrol occurred when P. lilacinus or P. cepacia were applied with or without a dilute potato-dextrose solution. There was no control (100% mortality) of stem rot with sterile culture filtrate from cultures of P. cepacia, but 70% control was achieved with filtrate from cultures of P. lilacinus. Both antagonists reduced the severity of Rhizoctonia stem rot on rooted cuttings in soilless medium. After 15-18 days, treatments with P. lilacinus had disease severity ratings (1 = healthy, 5 = dead) from 1.0 to 4.6 compared with infested or noninfested controls with ratings of 5.0 or 1.0, while ratings of poinsettia plants with all treatments of P. cepacia ranged from 2.3 to 3.8}, number={3}, journal={PLANT DISEASE}, author={CARTWRIGHT, DK and BENSON, DM}, year={1995}, month={Mar}, pages={301–308} } @article{cartwright_chilton_benson_1995, title={Pyrrolnitrin and phenazine production by Pseudomonas cepacia, strain 5.5B, a biocontrol agent of Rhizoctonia solani}, volume={43}, DOI={10.1007/BF00172814}, number={2}, journal={Applied Microbiology and Biotechnology}, author={Cartwright, D. K. and Chilton, W. S. and Benson, D. M.}, year={1995}, pages={211} } @misc{cartwright_benson_1994, title={Pseudomonas cepacia strain 5.5B and method of controlling Rhizoctonia solani therewith}, volume={5288633}, publisher={Washington, DC: U.S. Patent and Trademark Office}, author={Cartwright, D. K. and Benson, D. M.}, year={1994} }