Multi-year field research on green peach aphid, Myzus persicae, in the Northwest was undertaken in winter to elucidate the extent of its survival on perennials and winter annuals. It has long been recognized that the aphid overwinters successfully in the egg stage on peach trees. It is clear now that some anholocyclic populations of the aphid (adults and nymphs) also overwinter successfully on herbaceous plants despite cold, sometimes freezing conditions. This means that there are numerous sources from which the aphid can originate to infest potatoes in the spring. The findings also explain why programs attempted years ago to control the aphid on peach as a means to reduce its pest presence in potatoes were futile. The details on the winter findings of this and other aphid species will be discussed in the poster.
Species 1: Homoptera Aphididae Myzus persicae (Green peach aphid)
Keywords: overwintering
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