-20 to 0 ℃
--Make color improvement
--Increase sugar content
Application (5% solution)
Grape: make 500 dilution foliar spray on whole grape tree during color change period(2~4 weeks before grape harvest).
Apple: make 250 dilution foliar spray on whole apple tree at 35~42 days prior to harvest and again 7-14 days later.
Mixed with Brassinolide, the results is better.