Incidence of the Lupin Aphid Macrosiphum albifrons in Western Germany (Homoptera: Aphididae)
The lupin aphid Macrosiphum albifrons Essig 1911 was found in thriving colonies on Lupinus albus L. and L. angustifolius L. at Leichlingen, Rhineland, West Germany, in October 1986. This is the first record of the North American species, originally described from California by Essig in 1911, for Western Germany. In Great Britain this species was observed for the first time at the Royal Botanical Gardens, Kew, in the autumn of 1981 (Stroyan 1981) and has been spreading over the country since then (Carter et al 1984) Taking into account that according to Hardy & Cheng (1986) 60% of the insects caught in nets slung from ships in the North Sea and the English Channel were aphids and regarding the common western winds and the comparatively short distance between the British Isles and the Continent it is not surprising that the species does now occur in Germany. There is evidence that the aphid has already spread over other parts of the Rhineland, eg the recultivated areas of the brown coal surface mines where lupins are grown and that it might have existed there unidentified at least since 1985.