Hammer registered for Roundup Ready cotton volunteers
Hammer is expected to be registered for control of Roundup Ready and conventional cotton volunteers, offering Dealers a new opportunity in this market. “The cotton industry is in need of viable herbicide control measures for volunteer cotton seedlings,” said Stuart Lumber, Market Development Manager.
“This is particularly important for controlling volunteer Roundup Ready seedlings where glyphosate is no longer an option. The demand for Hammer is expected to grow as more Roundup Ready cotton is planted.”
A series of small plot efficacy trials using carfentrazone-ethyl, the active ingredient of Hammer, to control volunteer Roundup Ready cotton have been conducted over the past three cotton seasons by Monsanto Australia Ltd, Australian Cotton CRC-CSIRO and Crop Care Australasia .
“Carfentrazone-ethyl provides an alternative mode of action (Group G) which is highly desirable in managing herbicide resistance,” said Mr Lumber. “Results show that Hammer provides consistent control of volunteer cotton seedlings up to six leaves in size.
“Visual symptoms are rapid, observed within four to six days and consist of desiccated leaf foliage and plant growing points.“ Plant death occurs 10 to 14 days after application. “Results also indicate that while Hammer will control volunteer Roundup Ready cotton seedlings as a stand alone treatment, mixed with an oil adjuvant, improved weed control spectrum can be achieved by tank mixing with other knockdown herbicides such as paraquat or glyphosate based products.”
Hammer herbicide was first registered by the National Registration Authority (NRA) in March 2002 for improved control of hard to kill broadleaf weeds.
Hammer is a fast acting, contact herbicide containing 240 g/L carfentrazone-ethyl and is highly effective at very low use rates of 25-75 mL/ha.
17-Aug-2006