Studies on Papaya Culture in a Mild Climate Zone

III. Regarding the Setting Period and the Effect of Plant-Protecters

Abstract

1. Three setting periods, April 15, May 1 and May 15 had been tried.
In each period, when planted, plants were protected with polyethylen mulching and tunnelcovering.
Under this condition, plant growth was investigated.
2. This investigation was resulted in the following; April 15 and May 1 plots protected with mulching and tunnel-covering showed the best growth.
And it was proved that earlier planting protected with those film shelters brought a big effort comparing plants not protected with those materials.
This test showed that the best planting period of plants protected with plastic mulching and covering was the period, April 15 to May 1.
In case non-shelters, adquate plant-set priori will be in some time after May 15.
3. The more the growth is accelerated the earlier the flowers bloom and the flowers bloomed in late July became unripe fruits when harvested.
4. Earlier growth and flowering brought higher yield and the plants in the protected plots produced good yield though carrying the normal growth.
Those mulching and tunnel covering took a big effort in keeping off the weeds.