Abstract
The cashew is widely and commercially cultivated throughout the nation for its nut. Cashew is a polygamo – monoecious plant with both male and bisexual flowers developing in same inflorescence. Experimental study was conducted at Kesiary Cashew Plantation Sector, Medinipur as per the guidelines Regional Research Station, Jhargram and National Research Centre of Cashew, Karnataka (2014 – 2018). Changes in stigma receptivity were studied by over 100 panicles chosen at random taken from the commercially cultivated germplasms (WBDC – 4, Kottakerala – 2/97, Dicherla – 2/9, Vetore – 56 and Ullal – 2). The study was continued as for one day before, on the day of flower opening, one day & two days after flowering. It indicates that one day prior to opening & two days after of flowering, stigma receptivity was maximum in the plants of Vetore – 56. But on the day & one day after of flowering it was highest in Dicherla – 2/9. The optimum period of receptivity was at 12 noon on the day of anthesis.
Highlights
Cashew is widely & commercially cultivated throughout the nation for its nut
Discussions The study revealed that the stigma of cashew flower was receptive one day before anthesis and continues to be so far about 48 hours after anthesis
The optimum period of receptivity was at 12 noon on the day of anthesis
Summary
Cashew is widely & commercially cultivated throughout the nation for its nut. It is a polygamo-monoecious plant with both male & bisexual flowers developing in same inflorescence. But the peak period of flowering is December to February (Annual Report of NRCC, 1985 - 2010; Mathew and Nagabhushanam, 1988). The flowers are totally dependent on insects for pollination. Auto-pollination, apomixes, anemophily have no or little response.
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