A few weeks ago the new shoots on our runner beans were covered with blackfly. After consulting the wisdom of the Internet I sprayed the blackfly with a weak solution of washing up liquid. This seems to have slowed down the breading program of the little critters. Also, some ladybirds have appeared and seem to be making a meal of the blackfly. The runner beans have put on a lot of new growth and are cropping well. There are still a few blackfly around but I will leave the ladybirds to deal with them.