Zhao, Zishun; Wahl, Thomas; Marsh, Thomas - In: Canadian Journal of Agricultural Economics/Revue … 55 (2007) 4, pp. 499-514
"Apple maggot is an economically important apple pest that is native to the East Coast of North America, including Canada and the United States. Introduced to the West Coast of the United States in 1979, the pest is spreading rapidly in the region, threatening the major apple production area of...