Fig. 4

A map of locations for Sitobion avenae sampling. Arid area: Yulin Co., 38^o19′48″ N, 109^o43′25″ E; Shanglang Town of Mingqin Co., 38°35′48″ N, 103°06′17″ E; Xiaotian Town of of Mingqin Co., 38°36′40″ N, 103°07′18″ E; semiarid area: Yanlian Co., 35^o 41′29″ N, 109^o16′13″ E; Yaozhou Co., 34^o 53′38″ N, 108^o 58′18″ E; Fuxian Co., 35^o45′33″ N, 109^o11′26″ E; moist area: Longting Town of Yangxian Co., 33°12′43″ N, 107°38′30″ E; Jinshui Town of Yangxian Co., 33°16′20″ N, 107°47′45″ E; Chenggu Co., 33^o07′50″ N, 107^o16′49″ E