Cultivation of vanilla (Vanilla planifolia&nbsp;Andr.) is becoming increasingly popular in recent years in the hill zone of Karnataka, India.
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UMESHA, Y G SHADAKSHARI, H M CHANDRAPPA, K

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Journal of Spices and Aromatic Crops 5 (2) : 148, 1996 148 Miscellany Flowering and fruit set in vanilla (Vanilla planifolia Andr.) Cultivation of vanilla (Vanilla planifolia Andr.) is becoming increasingly popular in recent years in the hill zone of Karnataka, India. However, informa-tion on duration of flower opening and the ideal period for hand pollination is not available for this region. Hence studies on a.nthesis, stigma receptivity and hand pollination were conducted during March 1992 at the Regional Research Station, Mudigere (Karna-taka, India). Four flower buds which were about to open during the next day were tagged and the· time of flower opening and closing were recorded. Four flowers each were tagged and selfed by hand pollination immediately after flower opening at an interval of 30 min till the flowers closed completely. These flowers were observed for effective fer-tilization and fruit setting for 15 days. Flower opening was initiated around 1.15 am and was completed by 6.00 am. However the calyx was completely spread by 9.00 am only. Closing of flowers began around 1. 00 pm and was completed around 3.00 pm. Effective fertilization and fruit set was observed in all the flowers when hand pollination was resorted to immediately after open-ing of flowers around 1.15 am and· continued till closure of the flowers around 3.00 pm at an interval of 30 min. Hand pollination when continued even after closure of flowers by opening the closed flower up to 6.00 pm revealed that flowers pollinated after 6.00 pm dropped indicating that pollination was effective from 1.15 am to 6.00 pm. Though the stigma was receptive from 1.15 am to 6.00 pm, hand pollina-tion from 6.00 am to 11.00 am was ideal for quick and effective pollination. The efficiency of hand pollination was reduced after 11.00 am since anther dehiscence was at its peak during this period resulting in wastage of pollen. (Y G SHADAKSHARI, H M CHANDRAPPA & K UMESHA, Re-gional Research Station and College of Horticulture, University of Agricultural Sciences (Bangalore), Mudigere - 577 132, Karnataka, India). 

Flowering and fruit set in vanilla (Vanilla planifolia Andr.)

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Flowering and fruit set in vanilla (Vanilla planifolia Andr.)

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