The distribution and zones of harmfulness of buckthorn aphid Aphis nasturtii (Homoptera, Aphidida)
Keywords:
aphids, potatoes, buckwheat, buckthorn, spreading, zones of harmfulnessAbstract
The distribution and damage zones map for the buckthorn aphid Aphis nasturtii (Kalt.) harmfulness is provided. This species is a pest of potatoes and other crops, as well as a potential vector of dangerous viral diseases. In this study we used published resources, personal observations, data of catching aphids by suction and water traps. Biological and ecological features of the species, explaining the peculiarities of its distribution and harmfulness, criteria to assess the degree of harmfulness are given. The northern border of the species distribution area is located in the southern part of Karelia, in the Arkhangelsk Region (Kholmogory, Karpogory) and southwestern part of Komi Republic. The northern border of low harmfulness zone corresponds to the northern border of Latvia, extends to Pskov, Novgorod, Yaroslavl, Tverskaja Regions and reaches Ural. Low harmfulness is observed in the Ukraine steppes, Crimea, North Caucasus, and Transcaucasia. The zone of high harmfulness includes the Central Chernozem (Black Earth) region of the European part of Russia, western, northern and central parts of Ukraine, Moldova, south part of Belorussia, where in some years plant damage equals to 3 points.