The maturation of Diuraphis noxia depends on the temperature of their environment. Young nymphs appear similar to the adult aphid but covered with a white waxy filament. These females give birth to live, genetically identical daughters. The Russian wheat aphid life cycle begins inside a parthenogenetic female, where development takes place without fertilization.
P and Sloderbeck, 2005 Hein, et al., 1989 Hodgson and Karren, 2008 Michaud J. Russian wheat aphids have reduced cone-shaped cornicles with their wings which appear like shoulder pads. When the aphid is observed from the posterior end, the sides create what looks like a double tail. Russian wheat aphids have short antennae and a piercing-sucking stylet on their head. The body of the aphids is spindle-shaped, appearing wider in the middle and tapering on each end. Russian wheat aphids are green and relatively small, ranging from 1.6 to 2.1 mm long. ( Dolatti, et al., 2005 Hodgson and Karren, 2008 Michaud J. These cool season grasses are essential for the survival of the Russian wheat aphid during the warm seasons between wheat harvest and wheat emergence. Other cool season grasses such as crested wheat grasses, intermediate wheat grasses, and wild ryes serve as host plants when the preferred cereal crops are not available.
Of these cereal crops, wheat and barley are the plants most commonly infested by Diuraphis noxia. Unlike other aphids which move to woody areas throughout the course of the year, the Russian wheat aphids live inside the rolled leaves of cereal crops and grasses year round. Russian wheat aphids are able to survive in a variety of habitats as a result of their ability to withstand a wide range of temperatures. P and Sloderbeck, 2005 Zhang, et al., 2012) Most recently, the Russian wheat aphid has invaded Canada and the United States. As a result, these aphids are now found on every continent except Australia and Antarctica. Beginning in the early 1900’s it began to rapidly spread from its native origin of Asia to other countries by means of wind aided dispersal. It is native to Asia, originating in southern Russia, Central Asia, and the Middle East. The Russian wheat aphid, Diuraphis Noxia, is one of the most invasive agricultural pests found across the globe.
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