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My beans have quite a few black fly particularly on the top leaves. There are a few ladybirds doing their bit for me and I did read in a book that blackfly are harmless unless in large numbers.
So what would be considered a large number of blackfly?, and what is the best (least chemical) way of treating them? if at all.
I was hosing the leaves with water but now don't want to disturb the ladybirds!
Any advice appreciated thanks...
So what would be considered a large number of blackfly?, and what is the best (least chemical) way of treating them? if at all.
I was hosing the leaves with water but now don't want to disturb the ladybirds!
Any advice appreciated thanks...
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