Development of a Biological Control for Turfgrass Snow Molds: From the Laboratory to a Commercial Product

Dr. Tom Hsiang, Dept. Environmental Biology, University of Guelph

Snow molds

Gray snow mold

Gray snow mold on perennial ryegrass

Gray snow mold on Kentucky blue

Gray snow mold on creeping bentgrass

Gray snow mold (Tish sclerotia on CB)

Sclerotium (sclerotia - plural): a compact mass of hyphae, often with a dark rind capable of surviving unfavorable conditions.

Gray snow mold (Tish sclerotia on CB)

Gray snow mold (Tinc sclerotia on PR)

Gray snow mold (Tinc sclerotia on KB)

Gray snow mold (Tinc sclerotia)

Pink snow mold

Pink snow mold on creeping bentgrass

Pink snow mold on Kentucky blue

Pink snow mold on perennial ryegrass

Pink snow mold - pink foliage of KB

Pink snow mold - sporodochia on KB

Pink snow mold - spores

Pink or gray snow mold?

Snow mold control

Snow molds - chemical control

Snow molds - chemical control

Snow molds - other controls

Discovery of the biocontrol agent

Corn stubble after winter

Typhula phacorrhiza sclerotia

TP objectives (1994-1998)

Sample sites in Ontario

Applying inoculum

Snow fence

At snowmelt

Results

Plots inoculated with Tish or Tinc, 95

Plots inoculated with Tish or Tinc, 96

Plots inoculated with Tish, 97

Plots inoculated with Tish or Tinc, 97

Objectives (1998-2004)

Efficacy Results

Efficacy Results

Registration Package

Registration Package: product characterization

Registration Package

Registration Package

Registration Package

Rocky Mountains

Rocky Mountains Site II (May 2000)

Rocky Mountains Site II, TP trial, May 2000

May 2000. Green plots treated with TP in Oct 1999

Summary of Results

Summary of Results

Summary of Results

Future Research

Current Status (Fall 2008)

We hope to have a product for the turf industry in the near future

TP Funding

What was the money for?

Was it worth this cost?

Thank you for your attention
Contact me if you have questions (thsiang †at uoguelph.ca)