Theses and Dissertations - UTB/UTPA
Date of Award
5-2009
Document Type
Thesis
Degree Name
Master of Science (MS)
Department
Biology
First Advisor
Dr. Kenneth Summy
Second Advisor
Dr. Anita Baines
Third Advisor
Dr. Kristine Lowe
Abstract
Studies were conducted to evaluate the efficacy of Streptomyces isolates for the biological control of gummy stem blight (GSB) in cantaloupes (Cucumis melo var. ‘Primo’) in south Texas. Plants were monitored for seedling emergence, lesions, mortality and plant growth under laboratory, greenhouse and field conditions. Comparison of treatment groups indicated a significant reduction in plant mortality and enhanced growth of infected plants exposed to three Streptomyces isolates (MA1F4#2, WI1B#5, and MA2A4 #2), which appear to be most effective when used in combination. In all three experiments, GSB infection was associated with a significant reduction in reflectance of near-infrared wavelengths (700-1,100 nm) which was most pronounced in foliage of groups in which disease severity was greatest. The fact that reflectance differences were evident in wavebands not detectable by the human visual system suggests a considerable potential of remote sensing technology as an adjunct to conventional sampling techniques for detecting incipient infestations of GSB in cantaloupe and other crops, and for monitoring the efficacy of Streptomyces and other potential candidates for biological control of this serious crop disease.
Granting Institution
University of Texas-Pan American
Comments
Copyright 2009 Shima Chaudhary. All Rights Reserved.
https://www.proquest.com/dissertations-theses/evaluation-streptomycetes-biological-control/docview/305182741/se-2