J Holman, J Pelikan, A F G Dixon and L Weismann (The Hague: SPB Academic Publishing) pp. This plant is interesting on its own — being a perennial herb that commonly grows on the forest floor and rarely blooms. This is a large, common aphid on Vaccinium species across northwestern North America. Since that time I have collected this aphid elsewhere, in far flung places like Moses Lake, Washington, and Jemez Springs, New Mexico. The second and third authors have observed that P. undulatum is not a common plant in Mexico City, and the site where they find M. tonantzin is the only site they have seen this plant. in: Critical Issues in Aphid Biology: Proceedings of the 4th International Symposium on Aphids. During outbreaks these insects can reduce flower size and may even kill buds. Nightshade family hosts, such as tomatoes, are favored during this time but potato aphid can be found feeding on most vegetables, a wide variety of flowers, on common weeds such as pigweed and sowthistle, and small fruits. Pesticides must be applied legally complying with all label directions and precautions on the pesticide container and any supplemental labeling and rules of state and federal pesticide regulatory agencies. to live young, © Peter J. Bryant. 3–18, Hedrick P 1971 A new approach to measuring genetic similarity.Evolution 25: 276–280, Maelzer D A 1977 The biology and main causes of changes in numbers of the rose aphidMacrosiphum rosae (L.), on cultivated roses in South Australia.Aust. 67, 43 (1988). Just as described by earlier authors, this aphid lives on the lower leaves of its host, and appears to be mostly restricted to the more interior mountains of Idaho and adjoining states. Aphids moult four times before reaching adulthood. [1][2] It infests rosebushes as its main host in spring and early summer, congregating on the tips of shoots and around new buds. The eggs hatch in spring into wingless females which reproduce parthogenetically, and large colonies can quickly develop, being mainly found on the tips of shoots and around flower buds. Among the leaf litter were G. triflorum plants with both green and senescing leaves, the latter bearing many nymphs and adults of M. garyreed. P. Kindlmann and A.F.G. Macrosiphum rosae, the rose aphid, is a species of sap-sucking insect in the family Aphididae. The aphids seem to prefer the freshest growth of the plants. Proceedings of the Entomological Society of Washington 119: 580-600. Entomol. This host range, which includes a non-native tree (Liquidambar), is broader than most aphids, and might be viewed at first with skepticism. Since that time I was lucky enough to find M. tolmiea in the fundatrix stage on the lower slopes of Mt. There are many tightly host-specific species that are morphologically similar. It seems to me that Macrosiphum has recently diversified in the West, leaving biologically distinct species very similar in morphology. Jensen, A.S. 2012. The transfer to V. sempervirens was done in the laboratory, where after one day the transferred fundatrix left the plant, and its single deposited nymph was dead. It is not tended by ants despite the fact that it sometimes co-occurs with M. rhamni, which is often ant-tended.”  In those days I studied this species on Holodiscus discolor ssp. dumosus in rocky outcrops on the edges of mountains and cliffs at moderate to very high elevations. This is a really fabulous aphid, probably a close relative of M. albifrons. The life cycle involves two hosts. I worked on the field biology of this species for several years in grad school, it being one of the aphids I searched for during my weekly trips to McDonald State Forest outside of Corvallis. This is the first aphid I conducted my own research on. Macrosiphum willamettense sometimes lives together on the same plants with Illinoia spiraeae (MacGillivray).”. Over several seasons, when searching an area in the earliest parts of the growing season, whenever that occurs as dictated by snow pack and weather, M. opportunisticum can be found on any shrub in the list above (and perhaps others) that are in the best stage of development. The two share distinctive characters such as the slightly clavate siphunculi, spinulose tarsi, setose tibiae and rostrum, etc. The apterae that survive the summer give birth to oviparae and males. This feeling has been particularly acute with M. vancouveriae until last September when I finally found it again on the Rogue-Umpqua Divide in Jackson County, Oregon. You can find more information about the use of cookies in our Privacy Statement and Cookie Statement. At this location, early June is very early spring in terms of plant growth, yet L. lewisii was in bloom and the aphid population thriving. Biology and distribution.—This aphid lives throughout the growing season on Potentilla gracilis in meadows and edges of dry forest. I have collected aphids on Holodiscus very thoroughly for over 20 years now throughout western North America, and this species is extraordinarily uncommon.