Studies on the Extension of Tea Plucking Periods by the Plant Growth Regulator (Part 1)
On the Effects of the Concentration and Opportunity of the Leafspray by Some Growth Regulators
1968 Volume 1968 Issue 29 Pages 6-20
Details
1968 Volume 1968 Issue 29 Pages 6-20
To extend the plucking period, some growth regulators namely MCP, MCPP, etc. were tested to hasten or late the plucking time.
Some of these growth regulators were judged to be suitable to retard the sprouting of tea bud and delay the plucking time.
The good time of spraying in the first season was one or two weeks before sprouting stage, and was from soon after plucking time to one week before sprouting in the second or third season.
The following concentrations of these growth regulators were available, 100-1000 ppm. of MCP ; 500-2000 ppm. of MCPP ; 100-1000 ppm. of RD-7693 ; and 100-500 ppm. of MDBA and the higher concentration, the later sprouting. And too high concentration often brought about some leaf injury.
So the plucking time can be delayed one or two weeks by some chemicals.
