As my young swand plants gres they became encrusted woith aphis, as usual. So I decided to catch ladybirds which seem to like the seedheads of Phaleris grass, and put them on the swan plants as biocontrol. It worked beautifully with lots of larvae eating the aphis, then pupating. They cleared much of the infestation quickly.
Unfortunately the ever-present Harlequin bugs (Dindymus versicolor)found them. I don’t know what these wretched things don’t eat! They love Monarch pupae too, but every ladybird pupa seemed to attract a crowd of harlequins, queuing up for a feast. I have never found a bait or a poison that will work on them. The most persistent pests I know. Do you have these Aussie pests in NZ?
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