Asian pear tree pests
Last year my asian pears have black spots on the outside and something bores into the core and leaves a black trail. this ruins the fruit. Also many of the tree leaves turn black later in the year. What pest causes this and what course of action do I take?
Washington County Oregon
Thank you for your question. We can be more accurate in diagnosing problems if we have either photos, or a chance to examine the plant (in this case, the fruit). But from your description, your pear tree(s) have coddling moths, described here: https://pnwhandbooks.org/insect/tree-fruit/pear/pear-codling-moth Since they overwinter in dead leaves, fruit and the soil, prevention—by removing as much as possible in the fall—may reduce pest populations. I trust the article answers the current ‘what to do’ question. You can bring infected fruit to an Extension office (https://extension.oregonstate.edu/mg/metro/have-gardening-question) to confirm the pest if you are uncertain. Good luck!