Role of insect pollinators in coriander seed production
| dc.contributor.advisor | Srivastava, R.M. | |
| dc.contributor.author | Shivashankara | |
| dc.date.accessioned | 2018-10-25T05:00:32Z | |
| dc.date.available | 2018-10-25T05:00:32Z | |
| dc.date.issued | 2013-06 | |
| dc.description.abstract | The studies on “Role of insect pollinators in coriander seed production” was carried out during 2012-13 at G.B.P.U.A & T. Pantnagar, Uttarakhand, India, to study role of insect pollinators in coriander seed production. The mean abundance of honeybees was highest with 3.1 bees/min/ m2 at 12 PM and followed by 2.36 bees/min/ m2 at 3 PM and least was 1.16 bees/min/m2 at 10 AM. Its population was highest in the variety COR 44 with 4.93 and least in the variety COR 36 with 0.53. In case of Syrphids, the mean abundance of syrphids is highest at 10 AM i.e. 5.22 syrphids/min/ m2 followed by 4.34 syrphids /min/m2 at 3 PM and least at 10 AM was 3.81 syrphids /min/ m2 . It was highest in the variety COR 38 with 12.07 and least was zero in two varieties. The pollinators of coriander belong mainly to four orders viz., Hymenoptera, Diptera, Lepidoptera and Coleoptera. Important species visiting the coriander viz., Apis dorsata, A. cerana indica, Apis mellifera, Apis florea, Episyrphus balteatus, Eristalis tenax and, syrphus spp., Musca spp. and other Dipteran flies of which, A. cerana indica was more dominant followed by Apis dorsata but in Syrphids Episyrphus sp. was more dominant. The flowering period for the varieties COR 37 and COR 36 was 18 days; COR 55 was 28 days and 30 days for all other varieties. The foraging speed of honey bees viz., Apis dorsata and A. cerana are 11.22 seconds and 3.473 respectively. The foraging rate of Apis dorsata and A. cerana, are 13.53 and 23.43 umbels/ minute by Apis dorsata and A. cerana respectively. The foraging mode observed in bee, which was carried both pollen load and nectar in their visit but syrphids were nectar feeder only. Syrphid started foraging (8.23 AM) much earlier than the honeybees i.e.10.13 AM and 10.14 AM for Apis dorsata and A. cerana respectively. The bee, Tetragonula laeviceps was not involved in the pollination of the coriander. Pollen carrying capacity of the Apis dorsata was highest followed by A. cerana, the mean relative abundance of pollen is 2.43 ×104pollens/ml and 1.63×104pollens/ml for Apis dorsata and A. cerana, respectively. The cross pollination plots were showed higher yield than the caged plots, the 9 varieties which were pollinated by insects given tremendous increase in the yield. The mean % increase of yield in all varieties is 243.02%. The percent of yield increase was highest in COR 44 (308%) followed by COR 49 (303.81%) and least in COR 38 (177.5%). | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810082051 | |
| dc.keywords | insects, pollinators, coriander, seed production | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 89 | en_US |
| dc.publisher | G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand) | en_US |
| dc.research.problem | Coriander | en_US |
| dc.sub | Entomology | en_US |
| dc.subject | null | en_US |
| dc.theme | Pollination | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Role of insect pollinators in coriander seed production | en_US |
| dc.type | Thesis | en_US |