12/3/09

1

Early stages of encroachment (yr 2)

Enlarging patches of bentgrass (yr 3)

75 400

Penncross Penn A-4

12/3/09

2

12/3/09

3

Colonial bentgrass

Velvet Bentgrass

12/3/09

4

Round-up ready bentgrass

Annual bluegrass makes a fine playing

surface, but….

12/3/09

5

Life Cycle

Less dense more annual

types

More dense more perennial types

12/3/09

6

Annual Bluegrass

Winter Spring Summer Fall

spring shoot growth flush

initiation of root growth

seed head formation

causing spring decline in root growth

high photorespiration causes decline in net

photosynthesis

causing summer decline in root growth

Importance of Seed

CB

AB

Yr 1 Yr 2

CB

Poa supina

Poa trivialis

12/3/09

7

Warm-season turfgrass

Cool-season turfgrass

TURFGRASS SEASONAL GROWTH PATTERN

G R O W T H

Spring Summer Fall Winter

Zoysia

12/3/09

8

Bermudagrass

Cynodon spp. common transvaalensis hybrid

Bermudagrass Vegetative No shade Superior WUE No cold Aggressive Invasive Rhiz/Stolo/Seed Salt tolerant Low growth habit

St. Augustine Vegetative Some shade No drought Stolons Salt tolerant Insect Problems

12/3/09

9

Bahiagrass Cenetipedegrass

low maintenance

Seashore Paspalum

Salt tolerant tolerates close cut