Bumble bees pollinating Broad Beans

[picman]

My BB have masses of flowers this year , but the bumble bees are making holes in the back of the flowers for nectar and not doing the correct potentiating job...  I think its because of the dry spring , is it possible to stop them taking  a short cut ?  smaller bees seem to be following the correct job description !

[picman]

[Robert_Brenchley]

Unfortunately it can't be stopped. Keep your fingers crossed!

[powerspade]

Same problem with me. I noticed this at the beginning of this week. I also have a mass of flowers in fact the most I have ever seen

[Jayb]

Short tongue bees can't reach to feed with broad bean flowers or runner beans etc so they bite a small hole to get to the nectar. Long tongue bees can reach so do the proper pollinate job.