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PINOXADEN By John Peppers (Graduate Research Assistant) Scott McElroy (Alumni Professor) and Jim Harris (Research Associate)
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Al ab ama Tu rf Tim es > >> Wint er 2020
inoxaden is a new active ingredient that was released by Syngenta for turfgrass use in September of 2018 under the trade name Manuscript. Pinoxaden is a member of the phenylpyrazolin chemical family, the third family in the group that includes the aryloxyphenoxypropionates (FOPs) and the cyclohexanediones (DIMs). This herbicide group makes up the ACCase inhibiting herbicides (HRAC Group 1) which are also known as the graminicides because they are only active on grass species. These herbicides kill grasses by preventing the production of lipids. Pinoxaden was previously sold in the U.K. until June 2018, under the trade name Rescue for control of Poa trivialis and Lolium spp. within fescue systems. The current label for Manuscript allows for use in bermudagrass (Cynodon dactylon) and zoysiagrass (Zoysia spp.) in all areas except putting greens. It is also labelled for St. Augustinegrass
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(Stenotaphrum secundatum), but only in sod production where turfgrass injury can be tolerated. The label claims that Manuscript can control tropical signalgrass (Urochloa subquadripara), crabgrass (Digitaria spp.) and bahiagrass (Paspalum notatum). Dallisgrass (Paspalum dilatatum) is also labelled for control with Manuscript, but it is recommended that applications be made in the late spring or early fall while the dallisgrass is actively growing and not under drought stress. Manuscript can also be used to suppress torpedograss (Panicum repens) and seashore paspalum (Paspalum vaginatum). The maximum broadcast spray rate is 19.2 fl. oz/a and the maximum spot spray rate is 83.6 fl. oz/a. No more than 10,000 ft2 per acre can be treated with Manuscript. The addition of the adjuvant Adigor, at a 0.5 % v/v rate, is recommended for all applications of Manuscript.
Nontreated Raleigh St. Augustinegrass
Raleigh St. Augustinegrass treated with Manuscript (42fl oz/a) plus chlorothalonil at 140 fl oz/a
Raleigh St. Augustinegrass treated with Manuscript alone at 42fl oz/a
Raleigh St. Augustinegrass treated with Manuscript (42fl oz/a) plus propiconazole at 44 fl oz/a
