Blackfly on runner beans

Answered by Jo Posted in Category Pest Control & Nature

Dear Jo

My runner beans are covered in black fly, I have tried to wash off with water, plus tried soapy water but they keep comming back a few days later.  My broad beans have are well but they always do, it has effected my dwarf beans as well, they seem to eat the flowers,


Rita powell

Dear Jo

At the kitchen garden we have noticed that ladybirds seem to be in short supply this year and consequently there is nothing to keep the blackfly and other aphids in check.  We sprayed our blackfly with a Natural Insect Killing Spray and then ordered a delivery of Ladybirdlarvae.  When these arrived we emptied them onto the affected plants and since then we haven’t had a problem.


I wish you the best of luck with your fights against the blackfly.  Please let me know if I can be of any further help.


Kindest Regards




Jo Blackwell

Kitchen Gardener

Meet the Author: Jo Blackwell
Jo Blackwell

Jo Blackwell is our well-established Horticultural Advisor and the Kitchen Gardener in Stephanie's Victorian style Kitchen Garden. She caught the gardening bug when she bought her first home 21 years ago. Her first greenhouse soon followed and she later gained an allotment.

As well as tending the Harrod Horticultural Gardens, she enjoys maintaining her own vegetable plot at home. She has been a gardener for Harrod Horticultural for over 4 years now and has a wealth of experience in organic vegetable growing, ornamental gardening and in using all Harrod products.


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