author(s)
HR Kachhela and JJ Pastagia

abstract
The experiment on effect of abundance of pollinators on yield parameter of Niger, Guizotia abyssinica (L.f.) Cass. Grown at different dates of sowing was undertaken at college farm of Navsari Agricultural University, Navsari during Kharif, 2016. For the purpose, crop was sown at seven different dates and observations on number of pollinators visited during flowering period as well various yield parameters were recorded from the crop grown at particular dates of sowing. The mean number of pollinators visitation was higher on the crop sown on 30^th July (15.36/m²/5 minute) which was statistically at par with the crops sown on 10^th August (14.56/m²/5 minute) followed by 20^th July (13.39/m²/5 minute) and 10^th July (12.89/m²/5 minute). The crop sown on 30^th July recorded significantly higher Seed yield per hectare (625.90 kg) which was at par with the crop sown on 10^th August (531.56 kg). Positive and significant relationship was observed between the abundance of pollinators and yield parameters viz., number of seeds per capitulam (r = 0.667), seed yield per plant (r = 0.806) and seed yield per plot (r = 0.815). It indicates that the abundance of pollinators or increase in pollination activity at particular date of sowing increased the seed yield of Niger.