PROPHYLACTIC MEASURES FOR THE IMPROVMENT OF FLOWER PRODUCTION IN Jesminum sambac ·L. PLANTS

Document Type : Original Article

Authors

Ornamental Plant Research Department, Horticulture Research Institute, Agriculture Research Center, Egypt.

Abstract

One year old transplants of Arabian jasmine (Jasminum sambac L.) with a
height of 15-20 cm were sprayed monthly with one of the follOWing solutions:
1- A fungicide: Topsin M (thiophanate-methyl) at 2 gil.
2- An insecticide: Rogor (Dimethoate) at 2 mill.
3- A nutritive solution: (MS basal salts described by Murashige and Skoog. 1962) at
               full strength.                                                                                 .
4- Methanol (methyl alcohol) at 10% aqueous solution.
5- A combined treatment consisting of all the above-mentioned treatments.
6- A spray of water only for the control treatment.
The consistent trends along the two years of this study could be concluded in
the following:
"The combined treatment" resulted in the highest values of flower number,
plant height, number of leaves, branch number, and contents of carbohydrate, N, P
and K. However, some of these highest values were not confined to "the combined
treatment" only. The methanol treatment was responsible also for the highest records
of flower number, flower fresh weight, plant height, number of leaves, chlorophyll a, b
and carbohydrate contents. Highest value of carbohydrate content was a result of
either one of the later two treatments or the insecticide treatment. The nutritive
solution treatment resulted also in the highest N content. The control treatment was
responsible for the lowest values of flower number, flower fresh weight, plant height,
number of leaves, branch number, chlorophyll a, b and contents of carbohydrate, N, P
and K. On the other hand, flower neck diameter and leaf content of carotene were not
significantly affected by any of the treatments used.
It is recommended to pay more attention to Arabian jasmine (Jasminum
sambac) plants through routine prophylactic programs of nutrition and pest control in
order to get better vegetative growth and flowering of these plants of great importance
in landscape as well as for export of concrete oil for perfumery purposes.

Keywords

Journal of Plant Production
Volume 30, Issue 12
December 2005
Pages 7995-8011

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