Pemphigus betae
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Pemphigus betae around the roots of sugar beet (click on image to enlarge it)
Authors: Rudolph J. Pretorius, Gary L. Hein and Jeffrey D. Bradshaw
Source: Journal of Integrated Pest Management (2016) 7 no. 10
Authors: Rudolph J. Pretorius, Gary L. Hein and Jeffrey D. Bradshaw
Source: Journal of Integrated Pest Management (2016) 7 no. 10
Pemphigus betae nymphs and adult in poplar gall (click on image to enlarge it)
Authors: Rudolph J. Pretorius, Gary L. Hein and Jeffrey D. Bradshaw
Source: Journal of Integrated Pest Management (2016) 7 no. 10
Authors: Rudolph J. Pretorius, Gary L. Hein and Jeffrey D. Bradshaw
Source: Journal of Integrated Pest Management (2016) 7 no. 10
This aphid is a sporadic pest of sugarbeet in North America. In spring, the sexual stage forms galls on poplar trees (primary host) while the asexual stage feeds in the summer on the roots of beet and several other plants, including some weeds like Chenopodium album and Bassia scoparia. On sugar beet heavy infestations induce stunting, chlorosis, wilting, and even plant death. Sugar losses of more than 30% have been reported.
For a review see Pretorius et al. (2016).
