Plant growth retardants are applied in agronomic and horticultural crops to reduce unwanted longitudinal shoot growth without lowering plant productivity. Most growth retardants act by inhibiting gibberellin (GA) biosynthesis. To date, four different types of such inhibitors are known: (a) Onium compounds, such as chlormequat chloride, mepiquat chloride, chlorphonium, and AMO-1618, which block ...

Primo (trinexapac-ethyl) is probably the most commonly used plant growth regulator (PGR) on fine turf surfaces throughout the world. Most of us are quite familiar with the fact that, when used at label rates and timings, Primo reduces leaf elongation at four to seven days after initial application and will usually provide a 50 percent reduction in clippings. However, for many turf managers, red...

Plant growth regulators (PGRs) are commonly used in commercial farming to control lodging in cereals. PGRs have been shown to alter yield formation and plant stand structure, other than the straw length. To study their potential in Northern growing conditions PGRs and their application time impacts on plant stand structure and yield formation in tall and short statured cultivars of barley, oat,...

There has been some transition to using low-input fine fescues on golf courses, but these species have poor traffic tolerance and divot recovery, making them impractical for playable areas courses. The objectives of this study were determine the effect plant growth regulator (PGR) trinexapac-ethyl performance fescue mixtures when managed as a course fairway identify that perform well under stre...