Abdel-Muksoud,, B., Abass, R., EI-Torky, M., Srour, M. (2003). RESPONSE OF Jacobinia carnea, NICHOLS PLANTS TO UNICONAZOLE: II. EFFECT OF APPLICATION METHODS, RATES AND THEIR INTERACTION. Journal of Plant Production, 28(7), 5531-5555. doi: 10.21608/jpp.2003.252513
B. A. Abdel-Muksoud,; Rabha A. Abass; M. G. EI-Torky; Mona A. Srour. "RESPONSE OF Jacobinia carnea, NICHOLS PLANTS TO UNICONAZOLE: II. EFFECT OF APPLICATION METHODS, RATES AND THEIR INTERACTION". Journal of Plant Production, 28, 7, 2003, 5531-5555. doi: 10.21608/jpp.2003.252513
Abdel-Muksoud,, B., Abass, R., EI-Torky, M., Srour, M. (2003). 'RESPONSE OF Jacobinia carnea, NICHOLS PLANTS TO UNICONAZOLE: II. EFFECT OF APPLICATION METHODS, RATES AND THEIR INTERACTION', Journal of Plant Production, 28(7), pp. 5531-5555. doi: 10.21608/jpp.2003.252513
Abdel-Muksoud,, B., Abass, R., EI-Torky, M., Srour, M. RESPONSE OF Jacobinia carnea, NICHOLS PLANTS TO UNICONAZOLE: II. EFFECT OF APPLICATION METHODS, RATES AND THEIR INTERACTION. Journal of Plant Production, 2003; 28(7): 5531-5555. doi: 10.21608/jpp.2003.252513
RESPONSE OF Jacobinia carnea, NICHOLS PLANTS TO UNICONAZOLE: II. EFFECT OF APPLICATION METHODS, RATES AND THEIR INTERACTION
1Department of Floriculture, Faculty of Agriculture, Alexandria University, Egypt.
2Antoniades Research Gardens, Horticulture Research Institute, Alexandria, Egypt.
Abstract
Two successive experiments were conducted in plastic house under the natural conditions during the both seasons of 1996-97 and 1997-96. Each experiment included two application methods of uniconazole. as a foliar spray or as a soil drench, on a local cultivar of Jacobinia camea, Nichols plants, using the rates of 0,60,90, 120.150 and 160 ppm. The experimental design was a split plot with 3 replicates, the main plots represented the application methods, while the uniconazole rates resembled the sub plots. The results can be summarized as follows:
1- In both cases of application methods and comparing with the control, uniconazole rates significantly retarded the plant height, the shoot dry weight, the flowering time and the inflorescence dry weight and decreased the reducing, non-reducing and total soluble sugars and starch contents in the leaves and roots, but significantly increased the internode and shoot numbers and the leaf chlorophyll "a" and "b" concentrations. The general effect of the chemical rates exhibited the same trends.
2- The internode length and the leaf area were evaluated with the foliar spray and they were significantly decreased at the tested rates, compared with the control.
3- Comparing with the control, the number of florets per inflorescence, the inflorescence length, diameter and longevity were significantly increases at the uniconazole rates applied as a foliar spray, while the opposite was noticed with the soil drench. The general effect of uniconazole rates was Similar to the effect of the soil drench.
4- The soil drench was more effective than the foliar spray in depressing the plant height. the shoot dry weight, the floret numbers, the inflorescence dimensions, life and dry weight. the root contents of the reducing sugar and starch and the leaf and root contents of the non-reducing and total soluble sugars. The foliar spray gave a lower number of the internodes. a higher number of the shoots and earlier flowering than the soil drench.
5- All studied traits were markedly affected by each of the application methods, the uniconazole rates and the interaction between them. except the leaf contents of the chlorophyll" a" and" b", the reducing sugar and t he starch which were not affected by the application methods.
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