Tips for improving the efficacy of ethephon PGR spray ... | 農藥合法資訊網

2017年5月16日—SimilartomostgreenhousechemicalsandPGRs,ethephonisoftenappliedasaliquid(spray).Asethephonchangestoethylene,itchangesfrom ...

Air temperature at application and carrier water alkalinity can influence the efficacy of your ethephon plant growth regulator (PGR) applications.

Plant growth regulators (PGRs) are commonly applied as foliar sprays, substrate drenches, liner dips, or bulb, tuber and rhizome dips/soaks. Using PGRs on greenhouse crops assists growers in producing uniform and compact plants that can be easily packaged, shipped and marketed to consumers. The majority of the PGRs (e.g., ancymidol, chlormequat chloride, daminozide, flurprimidol, paclobutrazol, or uniconazole) used by greenhouse growers suppress stem elongation (extension growth) by inhibiting the biosynthesis of gibberellins (GAs), which are plant hormones that regulate growth and stem elongation.

In contrast, ethephon (2-chloroethyl; phosphonic acid) is a PGR that has multiple uses as it releases ethylene—another plant hormone responsible for ripening and senescence—upon application. It can be used to suppress stem elo...