Date of this Version
Lagos-Kutz D, Troutman R, Hartman GL. 2022. New records of invasive aphids (Hemiptera: Aphididae) on garlic mustard in the USA. Insecta Mundi 0946: 1–5.
Lipaphis alliariae Müller (Hemiptera: Aphididae) was identified from specimens collected in Lake County, Ohio, on the invasive garlic mustard, Alliaria petiolata (Bieb.) Cavara & Grande (Brassicaceae). The identification was performed on apterous viviparae using morphological and molecular data. Body color and shape of the cauda discriminated L. alliariae and L. pseudobrassicae Davis. Measurements of morphological characters of both species were similar, but they have distinct characters distinguishing them from L. erysimi Kaltenbach. Neighbor-joining analysis of cytochrome oxidase 1 (Cox1) barcoding indicated a close relationship of the aphids that feed on Brassicaceae, and the range of pair-wise distances for Cox1 barcoding of these species was 0.3–0.9%.
Garlic mustard, Alliaria petiolata (Bieb.) Cavara & Grande (Brassicaceae) is a highly invasive weed species in the United States. It was brought from Europe in the 1800s for herbal uses and erosion control (Munger 2001; USDA 2022). Records of aphids that feed on garlic mustard include Aphis gossypii Glover, Brevicoryne brassicae Linnaeus, Lipaphis alliariae Müller, L. erysimi Kaltenbach, Myzus ascalonicus Doncaster, M. ornatus Laing, M. persicae (Sulzer), and Rhopalosiphoninus latysiphon Davidson (Blackman and Eastop 2022). Out of this list L. alliariae and L. erysimi were not included in the list of aphid species adventive to North America north of Mexico (Foottit et al. 2006; Skvarla et al. 2017). Our article presents new records of aphids on garlic mustard in the USA.