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UW-Madison Turfgrass Science

Entomology * Genetics * Horticulture * Plant Pathology * Soil Science

UW-Madison Turfgrass Science Logo Image

UW-Madison Turfgrass Science

Entomology * Genetics * Horticulture * Plant Pathology * Soil Science

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Have a turf problem?

GDD Maps

Annual bluegrass seedhead flush

Annual bluegrass seedhead flush

Spring Annual bluegrass seedhead maximum: 1050-2900 GDD
Source: Calhoun – Michigan State University (2011)

GDD Maps

Annual bluegrass seedhead suppression with Proxy/Primo
Annual bluegrass suppression with Embark
Annual bluegrass seedhead flush
Crabgrass Pre-emergence Timer
Spring Broadleaf Herbicide Timer
Japanese Beetle Grub Preventative Timer

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