Palisade, CO
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· 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. |
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Japanese Beetle in Palisade
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 · 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.
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Trapping
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 · 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. |
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Eradication Timeline
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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.
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2005
· 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. |
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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. |
2007
· 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. |
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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. |
2009
· 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.
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2010
· 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. |
2011
· The Monitor-Only Program began. ~100 traps were set out.
· Another year of 0 beetle captures. |
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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. |
2013
· 1 beetle captured.
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2014
· 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
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· 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.
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Program Administration
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· 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. |
Acknowledgements
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