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Plum curculio regulations
Plum curculio (PC), Conotrachelus nenuphar, is a weevil native to the eastern United States and Canada. A serious pest of stone fruits, PC attacks plums, cherries, peaches, nectarines, prunes and apricots. To a lesser extent, pome fruits such as apples, pears, and hawthorns are also threatened. Historically, this pest existed only east of the Mississippi River, but in recent years has moved westward. In the early 1980s an established population was found in northern Utah, the current westernmost infestation.

It is believed that PC would thrive in Oregon’s climate, both west of the Cascades and in orchard areas of eastern Oregon. To protect Oregon’s agricultural interests, an exterior quarantine exists for PC. All states and provinces east of and including Manitoba, North Dakota, South Dakota, Nebraska, Kansas, Oklahoma and Texas are regulated. Box Elder county in Utah is also regulated. Fresh fruit from the following trees grown in the regulated areas are prohibited entry into Oregon: apple and crabapple (Malus spp.), apricot (Prunus armeniaca), nectarine and peach (P. persica), black cherry (P. serotina), choke cherry (P. verginiana), pin cherry (P. pennsylvanica), sweet cherry (P. avium), American wild plum (P. alleghaniensis), beach plum (P. maritime), European plum, prune (P. domestica), Japanese plum (P. salicina), hawthorne or haw (Crataegus spp.), pear (Pyrus communis), and quince (Cydonia oblonga). Soil and growing medium from within the dripline of the trees listed above is also prohibited from the regulated states.