Growth retarding and stimulating effects of CCC on Antirrhinum majus L.

Stimulation of stem growth on snapdragon, Antirrhinum majus, by foliar sprays with CCC has been reported by HALEVY and WITTWER (1965). Soil application gave little or no effect on growth. Our results confirm the observations by HALEVY and WITTWER on stimulated stem elongation when CCC is applied as a foliar spray. However, growth was significantly retarded when the growth regulator was applied to the roots. At present there is no explanation for these findings.