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A mild winter (Tauranga area) has contributed to a major explosion in oleander aphids on my swan plants and on many at Te Puna Quarry. Despite regular removal attempts they have succeeded in proliferating to almost plague proportion. With a large number o swan plants it takes a great deal o time just dealing with some of the plants which means re-infestation occurs very quickly. It has also been compounded by a very slow monarch breeding season meaning far more leaves on the plants.
There have been virtually no eggs or cats over the past 2 months which does mean squishing and spaying with a dishwashing solution can be done without impacting on monarch breeding. In the past week there has been a sudden surge in honey dew production leaving the swan plants all sticky. Normally by this stage o the year the swan plants would be covered in cats rather than aphids
It would be good to hear i other people are having bigger issues with aphids this year. I would be good to get feedback about how the monarch breeding season is going to date.
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