In the present experiments, the authors studied effects of CCC (2-chloroethyl trimethylammonium chloride) and Phosfon-D (2, 4-dichlorobenzyl-tributylphosphonium chloride) on growth, flowering, yielding and other habits of cucumber plant, Cucumis sativus L.
Cucumber seeds, variety $quot;Chunyong Sayoup$quot;, were planted in flat on May 19, 1965 and the seedlings were transplanted to a 8-inch-clay-pot at the time of the first-primary-leaf development was taken place. For treatment, CCC solution of 200 ppm per pot and phosfon-D powder of 1 tea spoon (about 2.6 gms) respectively applied. 300 ㎖ of CCC solution was poured in each pot (soil application) and Phosfon-D was dusted on to each pot likewise, five days after transplanting.
Once every 10 days plant height and number of leaves appeared were measured and observed daily at 10 A.M. flowering habit and appearance of pistilate and staminate flowers.
In the meantime, their fruits were harvested 10 days after flowering. The confidence interval test was adopted for statistical analysis evaluating experimental data at 5% level significance.
The results obtained for the present studies are shown as follows:
1. CCC treatment resulted in retarded growth of plant height considerably when compared with control. Internode elongation was most significantly influenced by CCC and its growth was retarded, while Phosfon-D treatment showed rather slightly increased tendency in plant height and internode elongation.
2. Number of leaves appeared were not influenced by CCC treatment. CCC treatment resulted in visibly dark greener than those of phosfon-D application and control.
3. The stem diameter of the first internode was found to be significantly thickened by CCC application.
4. The node location of the first tendril appeared to rise considerably by CCC application, whereas those of control and Phosfon-D slowed indifferent result.
5. As to the development of lateral shoots, although CCC seemed to accelerate growth of early stage and Phosfon-D suppressed it, the later stage of growth was not.
6. Dry matter production of plant tops was decreased by Phosfon-D application, in comparison with control.
7. CCC treatment lowered height of node location of the first male and female flower, whereas Phosfon-D rose it slightly.
8. Required days for flowering of the first male and female flowers was irresponsive among control, CCC and Phosfon-D applications.
9. Number of female flowers on the main stem was not affected by either treatments, and that of the lateral shoots was markedly increased by CCC application.
10. Phosfon-D application seemed to increase length and weight of the fruits, while CCC increased number of total fruits harvested.
It was regarded therefore CCC treated cucumber gives the highest yielding among various treatments made.
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