Growth, Flowering and Essential Oil Content of Different Species of Jasminum As Affected By Ethrel

Trials were conducted on Jasminum auriculatum, J. calophyllum, J. flexile and J. grandiflorum to study the effects of ethrel spray at 100, 500 and 1000 ppm concentrations. The response of chemical varied with the species, and the direction of effects changed with the concentration. While shoot length were suppressed by all treatments of ethrel in case of J. auriculatum and J. grandiflorum, in the other two species this character showed promotion. Application of chemical at 100 and 500 ppm, in general, promoted the formation of axillary shoots, stimulated the basal diameter of the sprayed shoots, and appreciably increased the flower yield in all the species of Jasminum. The treatments also delayed the flowering and affected the flower characters. The chemical treatments did not improve the concrete percentage of Jasminum species, except in J. grandiflorum with 1000 ppm concentration. Recovery of absolute increased appreciably with 1000 ppm of ethrel in J. auriculatum, J. flexile and J. grandiflorum.