I usually use ladybird larvae too, and plant lots of plants like borage that attract beneficial wasps , lacewings, hoverflies etc. But if I have an aphid problem and can't see a lot insect predators around, I sometimes use garlic spray, either DIY by crushing and soaking lots of cloves in distilled water, or I used to use an odourless organic garlic spray bought online. Can't say they are super-effective tbh, but deffo better than nothing
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