الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 150 |  |  |
| | | from | 150 | | |
Abstract
Ecological parameters play an important role on the yield of any crop, such as temperature, relative humidity, selected seeds, fertilization, soil structure, pollination and etc. Our goal of this study will focus on two from the important of the ecological factors.
Insect pollinators which recorded on the plants were divided into four groups, 18 belonged to Hymenoptera, 7 to Diptera, 3 to Lepidoptera and one to Coleoptera. Results revealed that foraging activity of four different bees commenced at 9.00-11.00 am, then increased in the 2nd and 3rd period of observation (11.00-1.00 pm and 1.00-3.00 pm). Finally, decreased in the 4th period (3.00-5.00 pm). Among the bees, Apis mellifera was the most predominant species with, followed by Ceratina tarsata in season of 2011 and result reversed between them in the season of 2012. The average time spent per flower was high significantly different in these four species.
For studying the impact of insect pollination and nitrogen fertilization on sesame production, the experiment was divided to 13 treatments of open pollination and non open pollination with three different levels of ammonium nitrate (N) and one level of seryalin as bio-fertilizer. Results clearly demonstrate that qualitative and quantitative parameters of sesame crop was significantly increased with opened pollination and with the increase of nitrogen fertilizer level up to 40 kg N feedan-1 plus or minus seryalin in reclaimed sandy soils in Ismailia, Egypt.