Detailed Product Description

ethephon 80TECH

features:

is used in the following routins  

(1) The flower-stem and leaf length of eight daffodil and ten tulip cultivars were effectively 

     reduced when ethephon (2-chloroethylphosponic acid) was applied to the soil.

     It controlled the growth of flower-stems better than leaves. The best time of application

     is when the shoots are about 810 cm in length. Too early application might cause blasting

     in sensetive cultivars of tulip. Spraying daffodils with ethephon reduced the plant height

     very little in 1978, but satisfactory in 1979.

(2) The optimum concentration of ethephon is about 1000 ppm (100 mg a.i./pot) for most of

      the cultivars of daffodil tested and 250500 ppm (12.5 and 25 mg a.i./pot) for tulip.

      However, the amount of ethephon must be adjusted to the forcing temperature and the

      duration of cooling. The higher the forcing temperature, the stronger is the response to  

      ethephon. Longer duration of cooling required higher concentrations. Too high ethephon 

      concentration delayed days to flower with 13 days only when the bulbs were cooled for a

      short period of time.

     Ancymidol reduced flower stem length considerably more than leaf length.

     A concentration of 0.250.5 ppm (0.1250.25 mg a.i./pot) reduced the plant height

     satisfactory for all cultivars tested.

(3) The McIntosh apple trees were sprayed with ethephon at 480 ppm + NAA at 40 ppm or

     with daminozide at 1000 ppm or ethephon + NAA + daminozide. These growth regulators

     were applied: ethephon for 1 or 2 weeks, NAA for 1 week and daminozide for 2 months

     before harvest. The experiment was designed with randomized blocks of 15

     replicates /trees/per treatment and was carried out in 3 experiments stations in

     different parts of Poland.