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The white-backed planthopper,  Sogatella furcifera  (Horváth) (Hemiptera: Delphacidae), is a serious pest of rice in Asia. However, little is known regarding the migration of this pest insect from the Greater Mekong Subregion (GMS) including Cambodia, Laos, Myanmar (Burma), Thailand, and Vietnam, into China’s Yunnan Province. To determine the migration patterns of  S. furcifera  in the GMS and putative secondary immigration inside China’s Yunnan Province, we investigated the population genetic diversity, genetic structure, and gene flow of 42  S. furcifera  populations across the six countries in the GMS by intensive sampling using mitochondrial genes. Our study revealed the potential emigration of  S. furcifera  from the GMS consists primarily of three major sources: 1) the  S. furcifera  from Laos and Vietnam migrate into south and southeast Yunnan, where they proceed to further migrate into northeast and central Yunnan; 2) the  S. furcifera  from Myanmar migrate into west Yunnan, and/or central Yunnan, and/or northeast Yunnan; 3) the  S. furcifera  from Cambodia migrate into southwest Yunnan, where the populations can migrate further into central Yunnan. The new data will not only be helpful in predicting population dynamics of the planthopper, but will also aid in regional control programs for this economically important pest insect.

Possible Source Populations of the White-backed Planthopper in the Greater Mekong Subregion Revealed by Mitochondrial DNA Analysis