Pythium Patch Outbreaks
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Transcript of Pythium Patch Outbreaks
PYTHIUM PATCHJ.E. KAMINSKI, PH.D.
[email protected] | @ITWEETTURF
PYTHIUM BLIGHT
• PATHOGEN: Pythium spp.
• HOSTS: Annual bluegrass (Poa annua)
• SYMPTOMS: Mimic summer patch, slow to develop, yellow leaves, melting out
• SIGNS: Mycelium develops following incubation, oospores, etc.
PRELIMINARY INFORMATION• Possible P. torulosum or P. catenulatum
• Native Soil Putting Greens with Topdressing– Poor Drainage (no internal)
• Selects Annual Bluegrass (may move on to bentgrass later)
• Symptoms Mimic Summer Patch
COMMONALITIES OF THIS PYTHIUM• SLOW Development
• Foliar Mycelium (Under Microscope)
• Signature Pythium Programs
CHIPCO SIGNATUREALUMINUM TRIS (O-ETHYL PHOSPHONATE)• Phosphonates for Pythium Control• Recent Years
– Increased Use of Chipco Signature– Every 1 to 4 weeks– “Stress Guard”
• Movement Away From Traditional Pythium Fungicides– Subdue MAXX– Banol– Segway
CHIPCO SIGNATUREALUMINUM TRIS (O-ETHYL PHOSPHONATE)
• No Known Resistance Development to Signature
• May Be Naturally Ineffective on Certain Pythium Species (Harmon, personal communication)
CURRENT RECOMMENDATIONS• Scout Suspect Areas and Have Diagnosed
– Pay Attention to Host– Summer Patch is DIFFICULT to Diagnose
• Maintain Signature Program BUT…– Rotate Traditional Pythium Fungicides Into Schedule During Favorable
Conditions• Apply to Foliage (Do NOT Water-In)• Curative Applications
– Banol or Segway– Subdue MAXX 5 Days Later
CURRENTLY ACTIVE IN NY MET REGION• Contact Us to Send Samples
Kaminski LabPenn State109 Tyson BuildingUniversity Park, PA 16802
• Email Prior to Sending ([email protected])
PYTHIUM PATCHJ.E. KAMINSKI, PH.D.
[email protected] | @ITWEETTURF