Attraxor® helps control Poa annua

Advice from Agrovista Amenity proves to be invaluable

Attraxor® plant growth regulator (PGR) has helped Warren Moss – Head Greenkeeper at Dudsbury Golf Club, to suppress Poa annua and increase the quantity of Bent grass on the greens.

Attraxor® helps control Poa annua

Attraxor®, a new BASF product, was recommended to Warren by David Chammings from Agrovista Amenity, and he was pleased to see an immediate response.

“The Poa had crept in and we estimated it to be at 70 percent in 2019,” said Warren. “Since starting with Attraxor® in May I have been able to suppress the Poa and through a reseeding program the greens are now 70 percent Bent, which is a great turnaround in such a short time period.”

Attraxor® has been shown to effectively regulate growth of managed amenity turf. The active substance, Prohexadione, inhibits the giberrelic acid pathway, which results in a reduction of turf height and turf biomass. Root growth is also promoted through the use of Attraxor® whilst turf colour and quality are maintained.

“This product is unique because it reduces clippings like other PGRs, but it also suppresses the seed heads of Poa annua,” explained Agrovista Amenity’s David Chammings. “It fitted well with what Warren needed to bring back the Bent in the greens at Dudsbury and we are both really pleased with the results.”

With the course south facing Warren said that extremely high temperatures over the past couple of years made maintenance very difficult. Poa started to creep in and the greens were left with very little Bent grass which was causing uneven surfaces and affecting playability.

On David’s advice, Warren applied Attraxor® at a low dosage of 0.375 kg/ha. The recommended application for Poa annua management is from 0.5 kg/ha to 0.65 kg/ha.

However, Warren needed to be cautious because of the high percentage of Poa on the greens. He started the Attraxor® treatment on 11th May and continued to apply it in 21-day intervals at the same dosage.

Attraxor® helps control Poa annua Warren chose overcast mornings to apply the product using Greenmaster Vitalnova Stressbuster and 2.5 kg/ha of N to prevent any yellowing.

“Using Attraxor® at 0.375 kg/ha was the right decision for this course and I have supressed the seed head production without yellowing the greens,” he said. “Unlike other PGRs I also noticed that it regulates the growth of the other grass varieties more consistently. I was especially impressed that it lasted the full 21 days.”

By suppressing the Poa, Warren has been able to reduce the amount of fertiliser and water needed on the course. “We were spending too much on fertiliser and using too much water to keep the Poa happy,” continued Warren. “However, this is water that we need elsewhere and so by using Attraxor® we have been able to improve the balance throughout the course.

“This year was the year to get aggressive with the Poa because there has been far less playing time for the members due to lockdown restrictions and I’m really pleased we took the plunge.”

The course was reseeded in August 2020 and Warren is hoping that this will increase the density of Bent to more than 80 percent by May 2021, when it has had chance to establish.

“I carried out the final application of Attraxor® on 12th August before our maintenance week and I plan to use it again from the end of April 2021 to tie in with competitions. It has really helped suppress the Poa and has given us the opportunity to return the greens to largely Bent in such a short time period that I want to keep it and make it part of the annual treatment program,” he concluded.

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