30 September, 2014

Do French beans in Kenya experience pollination deficit?


by Masiga R. et al.

Carpenter bee visiting flowers of French bean

French beans, also known as snap beans, are grown in Kenya for export especially to the European Union (EU) market. Most of the growers are small-scale in operation but invest heavily in crop production to meet the commodity demand for high standard grades that require smooth, straight and uniformly formed green pods. Nevertheless, these farmers have consistently reported achieving less than 50% pods of this high grade, resulting in more use and higher dependency on external inputs (e.g., inorganic fertilizers and synthetic pesticides).  
To address this challenge, we carried out studies to determine whether inadequate pollination was one of the problems that affect French bean production.



Read the whole summary in: English!
Read the scientific publication in JPE.
 

22 September, 2014

Big bees do a better job


by P. G. Willmer and K. Finlayson



Cross section of a periwinkle (Vinca) flower

Bumblebees (Bombus spp.) are well known for their abilities to forage at and pollinate flowering plants. However, unlike honeybee workers which are similar in size, bumblebee workers show large variation in individual body size. This variation occurs both within species and within individual nests of highly related sisters. This size variation may contribute to the bees’ efficiency in moving pollen grains between flowers.
 


Read the whole summary in: English!
Read the scientific publication in JPE.