Pollination of grain crops. Grechiha. TSvetki grechihi open type. They plentifully allocate nectar, possess a strong smell and involve insects of the Bee willingly visit tsvetki grechihi in the morning and collect both nectar, and pollen. Attendance bees tsvetkov grechihi within day depends on many conditions, but mainly from concentration of sugar in nectar and its quantities. Sugar allocation in nectar reaches a maximum at 10-11 ch. The greatest quantity of bees on grechihe happens with 9 to 11 ch. In a clear sunny day after 13 ch bees almost do not visit tsvetkov grechihi as they cease to allocate nectar. Pollination by bees tsvetkov grechihi raises zavjazyvaemost high-grade seeds on the average in 1,5 times. The increase of a crop from pcheloopylenija makes 26-30%.

For effective pollination grechihi it is enough to have on 1 hectares of crops two families of bees. The saturation of crops by bees is a lot of productivity increase grechihi does not give.

Pollination olive and commercial crops. Sunflower - the major medonos among field cultures of our country, pollinated by insects and by means of a wind. The cores opyliteli sunflower - melliferous bees. Certain dependence between quantity of bees on a site of sunflower and its productivity is observed. At pollination by bees the quantity of the developed seeds of sunflower makes 87-93%, without pollination by bees - 76-78%. Sunflower Grain yields at pcheloopylenii raise on 40-45%.

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