Thanks! I thought aphids were supposed to be tiny? Anyway, I'm guessing these eat bonsai, but if they are so attracted to my shallots, perhaps I should leave them there as a distractor away from my trees?
They are spring onions Allium Fistulosum (damn newsouthwelshmen - thisis a shallot Allium cepa ).
And they are most likely aphids. High pressure hose will set them back a lot. Garlic water; chili (or chilli ) water ; tobacco water or plain old Pyrethrum will do the deed.
These are black aphids and common to see plants covered with them during this time of year. Over the years, I've tried different sprays of one sort or another and at the end, I find the cheapest and most efficient way is to just knock them all off with a hose set with a fine strong nozzle. They might come back in a week so just spray again. You will find they will be gone once summer gets close.
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Dennis A journey full of experiments
I recently planted some vegetables in my home garden and finding the same kind of bugs on them. Should i also use the same spray? and after using it vegs still healthy to eat?