Folia Horticulturae

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China aster plant growth, seed yield and quality as influenced by Asahi SL treatment

Krzysztof Górnik, Mieczysław Grzesik

Department of Ornamental Nursery and Seed Science
Research Institute of Pomology and Floriculture
Pomologiczna 18, 96-100 Skierniewice, Poland
e-mail: kgornik@insad.pl

The aim of the study was to examine the effects of Asahi SL (sodium ortho and para-nitro phenolate, sodium 5 nitro guaiacolate) application on China aster stem length, seed yield and quality. The plants were sprayed with Asahi SL, in concentration of 0.0, 0.1, 0.2 or 0.4%, once during stem or flower bud development or during flowering. Asahi SL applied during flower bud development on tertiary stems or during flowering of flowers on tertiary capitula, increased seed yield, germination and vigour and did not modify vegetative growth of plants. Spraying plants with this compound performed earlier, i.e. during development of primary and secondary stems or buds on primary or secondary stems stimulated vegetative plant growth and decreased seed yield. The chemical used during flower bud development on tertiary stems alleviated also negative effect of thermal inhibition of high temperature (35°C) on seed germination. The biggest increase in the seed yield was observed after plant spray with Asahi SL at the stage of flowering of flowers on tertiary capitula. Such treatment stimulated mainly seed filling on secondary capitula. Thus, it is needed to carry out studies on the efficiency of later plant treatment with this chemical in the stimulation of seed filling on teriary capitula.

Górnik K., Grzesik M., 2005. China aster plant growth, seed yield and quality as influenced by Asahi SL treatment. Folia Horticulturae 17/2: 119-127.