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ISHS Acta Horticulturae 842: VI International Strawberry Symposium

GA3 INFLUENCES INCIDENCE OF FRUIT MALFORMATION, BERRY YIELD AND FRUIT QUALITY IN STRAWBERRY (FRAGARIA × ANANASSA DUCH.)

Authors:   R.R. Sharma, R. Singh
Keywords:   vegetative growth, reproductive parameters, disorder
DOI:   10.17660/ActaHortic.2009.842.160
Abstract:
Gibberellic acid influences vegetative and reproductive attributes and various disorders in many fruit crops. In India, strawberry is gaining popularity day-by-day but productivity and quality remain a major concern. Hence, studies were conducted with the aim to observe the effect of GA3 on strawberry. GA3 (75 ppm) was applied to the plants either during mid-November (at fruit bud differentiation), or mid-February (initiation of flowering) or at both times. In all, following treatment combinations were tried: (1) Water spray only, (2) GA3 (75 ppm) during November, (3) GA3 (75 ppm) during February, (4) GA3 (75 ppm) both during November and February. Fruits under control were sprayed with tap water only. Observations were recorded on various vegetative and reproductive parameters and on the incidence of fruit malformation, albinism and quality parameters, like juice content, TSS, acidity, etc. Results indicated that GA3 (75 ppm) spray either during November or February or both has increased the leaf petiole, leaf area and leaf number significantly. Fruit size decreased, and fruit number increased but there was no remarkable effect on fruit quality parameters. The incidence of fruit malformation was reduced significantly in all the treatments, but albinism remained unaffected. In all, spraying GA3 both during mid-November and mid-February was much more effective in achieving the desirable results than single application of GA3.

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