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#1
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Japanese beetles seem to have a color preference
We have a couple of shrub roses, ostensibly "Pink Grootendorst," which
manage to produce blossoms ranging in color from almost white to deep red. We find the beetles in the light-colored flowers all the time, and they've pretty much destroyed any that have already blossomed, while they leave the dark-colored flowers completely alone. -- Bert Hyman St. Paul, MN |
#2
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Japanese beetles seem to have a color preference
Bert Hyman wrote:
We have a couple of shrub roses, ostensibly "Pink Grootendorst," which manage to produce blossoms ranging in color from almost white to deep red. We find the beetles in the light-colored flowers all the time, and they've pretty much destroyed any that have already blossomed, while they leave the dark-colored flowers completely alone. What colour are the beetles? They may get better camouflage from predators on some colours. Just a guess. D |
#3
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Japanese beetles seem to have a color preference
In "David Hare-Scott"
wrote: Bert Hyman wrote: We have a couple of shrub roses, ostensibly "Pink Grootendorst," which manage to produce blossoms ranging in color from almost white to deep red. We find the beetles in the light-colored flowers all the time, and they've pretty much destroyed any that have already blossomed, while they leave the dark-colored flowers completely alone. What colour are the beetles? They may get better camouflage from predators on some colours. Just a guess. No Japanese beetles where you live? Lucky guy. http://www.arbordoctor.net/beetle_20...MO _2006_.jpg Metalic green & copper-colored body, about 0.5" long. No natural predators in the US, although my wife goes after them with a vengance. They're relatively new to Minnesota and we inadvertently planted several of their favorite plants when we upgraded our yard and garden about 10 years ago. -- Bert Hyman St. Paul, MN |
#4
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Japanese beetles seem to have a color preference
Bert Hyman wrote in
: In "David Hare-Scott" wrote: Bert Hyman wrote: We have a couple of shrub roses, ostensibly "Pink Grootendorst," which manage to produce blossoms ranging in color from almost white to deep red. We find the beetles in the light-colored flowers all the time, and they've pretty much destroyed any that have already blossomed, while they leave the dark-colored flowers completely alone. What colour are the beetles? They may get better camouflage from predators on some colours. Just a guess. No Japanese beetles where you live? Lucky guy. http://www.arbordoctor.net/beetle_20..._20_Popillia_2 0japonica__20_MO_2006_.jpg Metalic green & copper-colored body, about 0.5" long. No natural predators in the US, although my wife goes after them with a vengance. They're relatively new to Minnesota and we inadvertently planted several of their favorite plants when we upgraded our yard and garden about 10 years ago. We get very few here- I have seen a couple. While I know they are mainly diurnal predators, I can't help but think the gazillions of dragonflies around right now have something to do with it. I sat out on my deck yesterday evening and saw at least three D-flies catch some kind of flying critter. Wish I had a good camera! Chris |
#5
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Japanese beetles seem to have a color preference
"Bert Hyman" wrote in message . .. In "David Hare-Scott" wrote: Bert Hyman wrote: We have a couple of shrub roses, ostensibly "Pink Grootendorst," which manage to produce blossoms ranging in color from almost white to deep red. We find the beetles in the light-colored flowers all the time, and they've pretty much destroyed any that have already blossomed, while they leave the dark-colored flowers completely alone. What colour are the beetles? They may get better camouflage from predators on some colours. Just a guess. No Japanese beetles where you live? Lucky guy. http://www.arbordoctor.net/beetle_20...MO _2006_.jpg Metalic green & copper-colored body, about 0.5" long. No natural predators in the US, although my wife goes after them with a vengance. They're relatively new to Minnesota and we inadvertently planted several of their favorite plants when we upgraded our yard and garden about 10 years ago. -- Bert Hyman St. Paul, MN We get them now here in Wi. also, since global warming. I've killed 3200+ already this year. I don't think you can out smart them by color or plant choice. A plant they don't like one week/year, they go after mercilessly the next. They'll find something they like no matter what you plant. |
#6
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Japanese beetles seem to have a color preference
In "frinjdwelr"
wrote: We get them now here in Wi. also, since global warming. I've killed 3200+ already this year. We're not keeping count, but we do dump the contents of the jar we catch them in out in the alley every evening, and the pile is quite impressive. Apparently, nothing eats even the dead ones. I don't think you can out smart them by color or plant choice. A plant they don't like one week/year, they go after mercilessly the next. They'll find something they like no matter what you plant. There are lists of resistant and susceptible plants in this USDA pamphlet: http://www.aphis.usda.gov/lpa/pubs/pub_phjbeetle04.pdf It's from The Government, so it's Guaranteed Correct. [So far, the beetles have stuck to eating only plants on the "susceptible" lists, so I guess they agree] -- St. Paul, MN |
#7
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Japanese beetles seem to have a color preference
Bert Hyman wrote:
We have a couple of shrub roses, ostensibly "Pink Grootendorst," which manage to produce blossoms ranging in color from almost white to deep red. We find the beetles in the light-colored flowers all the time, and they've pretty much destroyed any that have already blossomed, while they leave the dark-colored flowers completely alone. Ever notice traps have yellow vanes. I put one out last year hoping to catch stink bugs. Didn't catch anything. Don't have many japs either. Greg |
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