Sökning: "B. cryptarum"

Hittade 2 uppsatser innehållade orden B. cryptarum.

1. 1. Insect pollination of faba beans, Vicia faba : the abundance and foraging behaviour of different pollinators and their effect on crop yield

   Kandidat-uppsats, SLU/Dept. of Ecology

   Författare :Ylva Johansson; [2020]
   Nyckelord :honeybee; Apis mellifera; bumblebees; B. pascuorum; B. hortorum; B. lucorum; B. terrestris; B. ruderatus; B. cryptarum; B. distinguendus; B. lapidarius;

   Sammanfattning : Faba beans, Vicia faba is known as a self-pollinating crop, however significant yield increases have been found in plants visited by honeybees and bumblebees. The bees either make positive visits, entering the flower and transferring pollen between different flowers resulting in cross-pollination, or negative visits, piercing the flower to “steal” nectar or collect nectar from extrafloral nectaries. LÄS MER

3. 2. Swedish bumblebee decline? Outcome from a national monitoring program with a five-year interval between surveys

   Kandidat-uppsats, Linköpings universitet/Biologi; Linköpings universitet/Tekniska fakulteten

   Författare :Annika Larsdotter; [2015]
   Nyckelord :Bombus; Habitat; Monitoring bumblebees; Occurrence; Red list; Status of bumblebee; Swedish inventory;

   Sammanfattning : Bumblebees are important pollinators that are said to be in decline all over the world. Swedish bumblebees have now been inventoried through a nationwide monitoring program for which data for the first time have been analysed. LÄS MER