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''Diabrotica'' is a widespread genus of beetles, sometimes referred to as cucumber beetles or corn rootworms, in the family Chrysomelidae. Members of this genus include several destructive agricultural pest species. == Range == Corn rootworms are one of the most economically significant consumers of maize in the United States. The western corn rootworm, ''D. virgifera virgifera'', and the northern corn rootworm, ''D. barberi'', are the most significant rootworm species in Iowa, a major corn-growing area. A third species, the southern corn rootworm, ''D. undecimpunctata howardi'', causes much economic damage in other regions.〔Staff, Purdue University Extension Service. (Corn Rootworms )〕 Corn rootworm larvae can destroy significant acreage of corn if left untreated. In the United States, current estimates show of corn, out of 80 million total are infested with corn rootworm. Estimates of economic damage to corn growers from the pest are about $1 billion.〔Marra, M.C., Piggott, N.E., & Goodwin, B.K. (2012). (The impact of corn rootworm protected biotechnology traits in the United States ). AgBioForum, 15(2), 217-230 Erin W. Hodgson, Utah State University Extension and Utah Plant Pest Diagnostic Laboratory. (Western corn rootworm )〕 ''Diabrotica'' was unknown in Europe until the late 1990s and was forbidden even in laboratories because of the difficulty in eliminating it with insecticides. It appears to have entered Europe from the US in large numbers during the Yugoslav wars and is especially widespread around US military airports, whose planes were likely to have transported the pest. It has since spread primarily in Italy, France and Germany.〔Miller N et al. (Multiple Transatlantic Introductions of the Western Corn Rootworm ) 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Diabrotica」の詳細全文を読む スポンサード リンク
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