Japanese beetle eradication in a Portland suburb begins April 17
A state ag department campaign to kill destructive Japanese beetles begins April 17 when contractors will apply a granular insecticide to lawns on 2,500 private properties in the Cedar Mill area of Washington County, just west of Portland.
The Oregon Department of Agriculture says the action, which could extend to annual treatments for up to five years, is crucial to knock out an infestation of the beetles that was confirmed last summer.
The project could become an uncomfortable legal problem for the ag department, however. The effort’s success hinges on the cooperation of all property owners, and a handful — 16 of the 2,500 as of April 6 — have said they won’t allow insecticide applied on their lawns. Several hundred others have not responded despite five direct mailings, 46 community presentations, social media postings and 500 hours of door-to-door canvassing.
If necessary, the department is prepared to ask a judge for an order allowing it to go on private property and complete the treatment, said Bruce Pokarney, the department spokesman. The department believes it has legal authority to take the action, he said.
“If we don’t have to do that, it would be great,” Pokarney said.
If it goes that far, the issue could involve balancing private property rights against the potential economic harm to businesses and property owners outside the area.
Ag officials say Japanese beetles are capable of causing heavy damage to commercial nurseries, vineyards, orchards, and crops ranging from cannabis to cane berries. A department analysis estimated that an infestation could cost Oregon agriculture an estimated $43 million a year in damaged plants, lost crop value, export restrictions and increased spraying and other production costs.
Clint Burfitt, the ag department’s insect pest program manager, said the property owners who have said they won’t allow insecticide applications are scattered throughout the 1,000-acre treatment area.
“We’re trying to communicate with them about what their concerns are,” he said. “Some are concerned about pesticides in general. It doesn’t matter what pesticide it is, it’s a word that sparks fear. Others don’t want the government on their property.”
He said nurseries would be hardest hit initially, followed by small farms, berry crops, orchard fruit and nut crops and “definitely grape production.” In the Great Lakes region, some vineyards have to spray three times a summer to control adult Japanese beetles, he said.
If the department does nothing, it could result in thousands of people trying to control the beetles on their own, using much more pesticide, Burfitt said. Traps and biological controls aren’t enough to control them, he said.
“In order for Japanese beetle eradication to work, we need to treat the irrigated turf grass in this area — people’s lawns,” Burfitt said.
The treatment is a granular form of Acelepryn, an insecticide commonly used to control grubs on golf courses. The treatment does not involve a liquid spray or aerial applications. Burfitt said Acelepryn is not hazardous to humans, pets or wildlife. “Safety is the most important aspect of this entire project,” he said.
The department would apply the insecticide in April or May, when Japanese Beetles are in their grub, or larvae, form. The treatment would be done once a year for up to five years. The department is contracting with a professional pest control company to do the applications.