Large-scale pollination experiment demonstrates the importance of insect pollination in winter oilseed rape

  title={Large-scale pollination experiment demonstrates the importance of insect pollination in winter oilseed rape},
  author={Sandra A. M. Lindstr{\"o}m and Lina Herbertsson and Maj Rundl{\"o}f and Henrik G. Smith and Riccardo Bommarco},
Insect pollination, despite its potential to contribute substantially to crop production, is not an integrated part of agronomic planning. A major reason for this are knowledge gaps in the contribution of pollinators to yield, which partly result from difficulties in determining area-based estimates of yield effects from insect pollination under field conditions. We have experimentally manipulated honey bee Apis mellifera densities at 43 oilseed rape Brassica napus fields over 2 years in… 
Wild pollinators enhance oilseed rape yield in small-holder farming systems in China
Regression analysis indicated that local abundance and diversity of wild pollinators were positively associated with seed set and yield/straw ratio, while honey bee abundance was not related to yield parameters.
rop management affects pollinator attractiveness and isitation in oilseed rape
Ecological intensification of agriculture implies managing ecological processes to improve performance of agricultural ystems. However, impacts on relevant ecological functions such as insect
Pollinators enhance crop yield and shorten the growing season by modulating plant functional characteristics: A comparison of 23 canola varieties
This study elucidates how insect pollination alters the character and function of a globally important crop, supporting optimization of yield via intensification of insects pollination, and highlights the beneficial effects of insectpollination early in the season.


Contribution of insect pollinators to crop yield and quality varies with agricultural intensification
There is clear benefit delivered by pollinators on yield quantity and/or quality, but it is not maximized under current agricultural intensification, suggesting the need of landscape-scale actions to enhance wild pollinator populations.
Honeybees and Rapeseed: A Pollinator–Plant Interaction
Pollinators and pollination of oilseed rape crops (Brassica napus L.) in Ireland: ecological and economic incentives for pollinator conservation
The honeybee, Eristalis hoverflies and bumblebees (especially Bombus sensu stricto and B. lapidarius) were the best pollinators of winter oilseed rape based on the number of pollen grains they carry, visitation rates per flower and their relative abundance per field.
The influence of pollinator abundance on the dynamics and efficiency of pollination in agricultural Brassica napus: implications for landscape‐scale gene dispersal
The results begin to resolve a long-standing inconsistency among previous studies by suggesting that the susceptibility of fields of B. napus to long-distance cross-pollination by wind depends on the level of bee activity.
Cross-pollination benefits differ among oilseed rape varieties
The present results highlight the importance of considering varietal differences in crop pollination research and information on the pollination requirements of crop varieties is required by farmers to optimize management decisions in a world of increasing agropollination deficits.
Pollination efficiency of wild bees and hoverflies provided to oilseed rape
The efficiency of the solitary mason bee Osmia rufa and two hoverfly species as pollinators of oilseed rape Brassica napus was examined in a standardized caged plant breeding regime and found that mason bees are more efficient in plant breeding and managed pollination systems.
Effect of pollinator abundance on self-fertilization and gene flow: application to GM Canola.
It is predicted that canola approaches almost full seed set without pollinators and that autonomous pollination is responsible for > or = 25% of seed set, irrespective of pollinator abundance, and the wind, not bees, is the main vector of long-distance gene flow in canola.
Wild Pollinators Enhance Fruit Set of Crops Regardless of Honey Bee Abundance
Overall, wild insects pollinated crops more effectively; an increase in wild insect visitation enhanced fruit set by twice as much as an equivalent increase in honey bee visitation.
Bee abundance was greatest in organic fields, followed by conventional fields, and lowest in GM fields, while pollination deficit was greatest on the other side of the spectrum, including organic fields and GM fields.