In our last blog post on the New Family Farm, Natalie Hernandez explained that there are many different aphid species that can pose a major threat to seed potato farmers as carriers of Potato virus Y (PVY) – a serious concern for seed producers. In this follow up story, we will see how one of those aphid species—the soybean aphid, an accidentally-introduced pest from the Far East—is linked to two other deliberately-introduced invasive species, common buckthorn and the Asian lady beetle, which have each emerged as serious pests in their own right.
It all began with common buckthorn, a fast-growing shrub that was brought to the US from Europe in the early 1900s to use as a windbreak plant to reduce soil erosion in Midwestern farm fields. It did a poor job as a windbreak but survived and flourished in southern Wisconsin and Michigan where it has become a serious threat to woodlots because it outcompetes natural vegetation. (more…)