One of the major dilemmas we have at SSGC is Poa Annua or Annual Bluegrass management. How can one tiny little plant cause so much uproar? While many Superintendents do everything in their power to eradicate this "weed", we here at South Suburban embrace our Poa and manage it into a putting surface that is as good as the best bentgrass greens.
Come Spring, the Poa plant begins production of seedheads for propagation. If left unchecked, these seedheads not only become unsightly, but cause the green to become bumpy and inconsistent. One of the major tools we use is a Plant Growth Regulator(PGR) called Proxy. This product inhibits the maturation of the seedhead, and doesn't allow it to emerge. By monitoring soil temperatures on our greens, we have had very good control over the past few years and are confident that this year will be just as good.
Do you use a GDD model to set your timing? If so, what is your target number and which model?
ReplyDeleteJohn, we did not use a GDD model. we have been taking soil temps inthe top 2-3" of the greens, looking for 48-50 degrees. We have used this method for @ 4 years and have had great success with it. I think the key is to stay diligent with subsequent applications in order to avoid seedhead maturation. Some years, we have applied Proxy well into the summer months.
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