Full TGIF Record # 65224
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Author(s):Nelson, Eric B.; Craft, Cheryl M.
Author Affiliation:Nelson: Associate professor, and Craft: Research Support Specialist II, Department of Plant Pathology, Cornell University, Ithaca, NY
Title:Compatibility of microbial inoculants with conventional turfgrass pesticides
Section:Turfgrass: Research and development
Other records with the "Turfgrass: Research and development" Section
Source:1998 New York State Ornamentals Project Reports Relating to IPM. 1999, p. 66-74.
# of Pages:9
Publishing Information:[N.Y.: New York State IPM Program, Cornell University and New York State Department of Agriculture and Markets]
Series:NYS IPM Publication # 413
Keywords:TIC Keywords: Soil microorganisms; Soil inoculants; Pesticides; Herbicides; Fungicides; Disease control; Biological control; In vitro; Toxicity; Pythium graminicola; Sclerotinia homoeocarpa; Rhizoctonia solani; Agrostis stolonifera; Golf courses; Golf course maintenance; Pathogens; Brown patch; Anthracnose; Bioassay; Microbial inoculants; Insecticides; Interactions; Combination treatments
Abstract/Contents:"This project was designed to examine the impact of pesticide applications on the efficacy of commercial microbial inoculants used to suppress turfgrass diseases. Our goal in this research was to document any positive or potentially negative combinations of biological disease control products with commonly-used fungicides, insecticides, and herbicides. Our studies were designed to first determine the in vitro toxicity of various herbicides, insecticides, and fungicides to selected turfgrass pathogens so that laboratory and field results could be properly interpreted. Next, we examined in laboratories studies, the impacts of high label rates of selected chemical pesticides on the efficacy of inoculants for control of Pythium graminicola, Sclerotinia homoeocarpa, and Rhizoctonia solani on creeping bentgrass. Finally we tested an expanded number of commercially available inoculants in field studies without conventional golf course management compared with inoculants used in conjunction with conventional golf course management practices. Results from the study revealed a number of important findings. First, and somewhat surprising, was the fact that a number of pesticides commonly used in golf turf management had significant toxicity to non-target pathogens. This is best exemplified by the activity of Daconil against P. graminicola, Trimee and Merit against S. homoeocarpa, and Subdue Maxx against R. solani. These findings complicate the interpretation of bioassay results and complicate interpretations of field results when such pesticides are used in combination with biological agents. Second, our results clearly showed that a number of pesticides used in combination with inoculants could dramatically affect their suppressive qualities toward various diseases. This is best illustrated by the impact of Bayleton and Proxol on the suppression of P. graminicola by E. cloacae. Finally, our results showed that some commercially available microbial inoculants were suppressive to Brown patch and Anthracnose diseases."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Nelson, E. B., and C. M. Craft. 1999. Compatibility of microbial inoculants with conventional turfgrass pesticides. NY State Ornamentals Proj. Rep. Rel. IPM. p. 66-74.
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