Eradicating Japanese Beetles
Palisade, CO
· Palisade is located on the Colorado River in extreme west-central Colorado.
· About 2,600 people live within the 1.25 sq. mi. town limits.
· It is the center of fruit production in Colorado, famous for it’s peaches and wine.
· The grape and wine industry has been growing over the past two decades.
· Palisade is home of more than fifteen wineries.
· Annual precipitation is about 8 inches.
· Microclimate makes it one of the warmest places in Colorado.

Japanese Beetle in Palisade

Japanese Beetle· Japanese beetles have been present in low numbers in town since at least 1997.
· Japanese beetle was discovered by a Master Gardener in 2002.
· Local citizens formed a Japanese Beetle advisory/eradication committee in 2003.
· The threat to local agriculture was used as the rationale to eradicate.
· Public meetings were held, newspaper articles printed to educate/inform public.
· Eradication efforts began in 2004.
· Japanese beetle captures have been reduced by 99% over five years.
· The project cost has been less then $120,000 over that time period.

Japanese Beetle trap· Trapping with 2-lure JB traps conducted annually.
· There is a 1 year delay between chemical application and evaluation of that years treatment.
· 1200+ beetles were captured in 2003.
· There have been annual reductions in trap captures.
· 13 beetles were caught in 2008
· County-wide trapping survey has not found Japanese beetles outside of Palisade.
2003-2014 Beetle captures

Eradication Timeline
JB 2004


· More than 700 properties were treated with Merit 0.5G in 2004. 
 This was most of the irrigated turf within the town limits.
 978 beetles were caught in traps.
 The project was funded by a CSU Specialty Crops Grant, and support from the Colorado Department of Agriculture, Town of Palisade, and Mesa County.


· The same area as in 2004 was treated, since treatment decisions had to be taken before 2004 treatment could be evaluated.
· Lawns in a hot spot area were retreated with Dylox in August
· 116 Japanese beetles were caught, representing an 88% decrease in numbers.
· 38 females (32.7%) were captured.

JB 2005
JB 2006


· Merit was applied to 200 properties in the core area where 2005 captures occurred.
· 66 beetles were caught, a 43% reduction.
· 14 females (21.2%) were captured.
 Captures were limited to the core area with a few stray males caught blocks away.
· Virginia creeper was identified as an adult host plant and all vines within the core area treated with Tempo insecticide in July.


· Merit was applied to about 300 properties.
· 47 beetles were trapped, a 29% decline.
 5 females were captured (10.6%).
 Only 4 beetles (1, 3) were caught in the Crawford Lane hot spot.
 The rest of the beetles were caught a block east of the 2006 hot spot. This area was outside the 2006 treatment boundary but was treated  in 2007.

JB 2007


JB 2008


· 300 properties were treated with Arena. The core area and several properties along the Colorado River were treated.
· 13 beetles were caught, a 72% decrease.
 All beetles captured in 2008 were male.
 All of the beetles were captured east of the area where previous captures occurred.
· All lawns in the new infestation area were treated with Merit and all Virginia creeper sprayed with a foliar insecticide.


· Trap captures were 0.
 Hot spot treatments and mating disruption with pheromones in areas based on 2007 data collected.
 Trapping will continue in 2010, but will not treat unless beetles are captured.

JB map 2009


· 432 traps placed. 0 beetles captured.
· No treatments applied. Lawn dry-down in the "hot zones" was encouraged.

· Traps in the "hot zone" were monitored weekly all other monitored bi-weekly.


· The Monitor-Only Program began. ~100 traps were set out.
· Another year of 0 beetle captures.

JB map 2011
JB map 2012


· ~100 traps were set out around the end of May. They were checked once in mid season during peak Japanese beetle flight and remove in late Aug.
· 4th year in a row with 0 beetle captures.


  · 1 beetle captured.
2014 Japanse Beetle locations


· 56 traps were set out in early June. They were checked once in mid season during peak Japanese beetle flight and remove in mid Sep.
· 21 lawns treated with Arena in the capture area of the previous year.
· 0 Japanese beetles caputred.

Control Strategies
· Irrigated lawns were targeted for control of Japanese beetle larvae.
· Merit 0.5G applied in 2004-2007, Arena 0.25G in 2008, top of label rate.
 All lawns within town limits were treated in 2004/2005.
· Treatments were limited to hot zones in 2006-2008.
· Turf treatments were applied in mid to late June.
· Virginia creeper within hot zones targeted with foliar sprays, 2006-2008 Cyfluthrin or bifenthrin was applied in mid July.
· Lawn “dry down” encouraged in 2004/05, with limited public acceptance.
JB treatment

Program Administration
JB Meeting · JB Eradication Committee administered project in 2004-05.
· Upper Grand Valley Pest District took over in 2006-2008.
· Project coordinator hired each year to oversee operations.
· 2004/05 funding through grants. 2006-2008 funding from UGVPD.
· Merit 0.5G was donated by Bayer Environmental Science 2004-2007.
Arena 0.25G donated by Valent Professional Products 2008.
· Application donated by TruGreen Chemlawn in 2004.

Colorado Department of AgricultureValentCSU ExtensionTown Of Palisade
Mesa County Logo JB Eradication Logo Palisade Chamber of Commerace
Bayer Crop Science


This page was updated on October 31, 2014