Gardeners often pinch out the tops of broad beans to curb black fly.  We very rarely pinch out the tops. But if blackfly are a problem, the tips may be pinched out when the first pods are set.

To pinch out the tops:

* first select the top of the broad bean plant

broad-bean-top

* find broad bean top

find-broad-bean-top

* Hold the tip between finger and thumb

pinch-out-top-of-broad-bean

* pinch the tip so that it breaks away from the plant

top-of-broad-bean