Abstract
White mango scale (WMS) is a sucking insect which poses severe threat to mango plantation. A survey of the distribution and host range of WMS, Aulacaspis tubercularis was conducted in western Ethiopia from May 10, 2016 to July 15, 2016. The surveys were started from Loko village, the focus of its first record, and extended over series of mango farms in the four cardinal directions. This study showed that WMS has already spread from Loko, the focus of its first record in the four cardinal directions. It spread over the air distances of 97, 98, 92 and 43 km to the east, south, west and north directions, respectively, with high and very high levels of severity statuses in most of the localities surveyed. It was found out that mango was the only host for WMS in western Ethiopia. It is recommended that understanding the mechanism by which WMS is spread is crucial to controlling it. Key words: Infestation, Loko, severity, survey, Wollega, distance.
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