THE EFFECT OF TWO PLANT GROWTH REGULATORS ON THE INHIBITION OF PRECOCIOUS FRUITING IN PINEAPPLE
The favourable climatic conditions of Queensland's Summer and Autumn can accelerate the growth rate of pineapple (Ananas comosus (L.) Merr.) suckers to such a degree that the incidence of precocious fruiting the following summer can be as high as 50–70%. This breakdown in crop control can seriously affect farm management and returns through inefficient harvesting and substantial losses caused by sunburn and overripe fruit. 2-(3-chlorophenoxy) propionic acid (Fruitone CPA) or paclobutrazol (Cultar) were applied as foliar sprays at various rates, application volumes, and timings in an attempt to limit sucker growth rate to a degree that natural flowering was inhibited. In trials from 1988–1992, Fruitone CPA reduced the incidence of precocious fruit from an average 48.5% to 8.2%, while Cultar was less effective with a reduction from an average 55.2% to 28.5%. It was concluded that Fruitone CPA applied at 50 ppm active constituent in 3000 L ha-1 in mid to late March was the most effective treatment.
Scott, C.H. (1993). THE EFFECT OF TWO PLANT GROWTH REGULATORS ON THE INHIBITION OF PRECOCIOUS FRUITING IN PINEAPPLE. Acta Hortic. 334, 77-82