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Vol. 22, No. 15, August 8, 2007
 
Phytophthora and irrigation water
Mary Hausbeck
Plant Pathology
 
Milk crate with cucumber baits Milk crate floating in a pond
Milk crate with cucumber baits. Milk crate floating in a pond.
Phytophthora capsici swimming spores
Phytophthora capsici swimming spores
under magnification.
Pear with Phytophthora lesions
Pear bait with Phytophthora lesions.

irrigation graph
Ponds fed by deep wells appeared to offer a safer
alternative to surface water for irrigation. Provided
that run-off from nearby fields does not enter the
pond, there is a low risk of pathogen infestation in well-fed ponds.
2005 River Sites
2005 river sites graph
The pathogen did not appear to overwinter in surface water sources. Phytophthora was detected in water at times when rainfall was low and the likelihood of irrigating was high.
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The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the Michigan Agricultural Experiment Station, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.
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