All Things Gardening forum: Japanese beetles

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Name: Rj
Just S of the twin cities of M (Zone 4b)
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crawgarden
Oct 3, 2017 7:34 AM CST
http://blog-yard-garden-news.e...
Prudence, indeed, will dictate that Governments long established should not be changed for light and transient causes; and accordingly all experience hath shewn, that mankind are more disposed to suffer, while evils are sufferable, than to right themselves by abolishing the forms to which they are accustomed.
Name: Deb
Pacific NW (Zone 8b)
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Bonehead
Oct 6, 2017 5:07 PM CST
Interesting article, and nice to see the problem addressed at the source (what factors contributed to a higher number of beetles this year) rather than simply advising what poison to apply. Thanks Craw.
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Name: Daisy I
Reno, Nv (Zone 6b)
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DaisyI
Oct 6, 2017 11:02 PM CST
I just recently read an article about controlling insects that start their lives in the soil with beneficial nematodes. Apparently, that includes Japanese Beetles. I don't think I have ever seen a Japanese Beetle and the only nematode I ever met did not have 'beneficial' in its name.

I can't find the article again (of course!).
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ThomasHenriksen
Oct 7, 2017 1:51 AM CST
Interesting. To my luck I don't have any of these in my garden, but it seems many have problems with these bastards:-/
Name: kathy
Michigan
Zone 4b, near St. Clair MI
Cottage Gardener Lilies Organic Gardener
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katesflowers
Oct 7, 2017 6:38 AM CST
We have had the Japanese beetle as a high population problem for about 12 years. Before that I noticed one or two on the grape vines and thought - wow, what a pretty insect - wonder what it is. I soon learned.
Each year, in early to mid-summer the 3" brown circles of dead grass show up in large areas, where the larva have been eating the roots.
Once the adults have emerged, they start the eating/mating cycle. In my zone 4b garden they seem to favor rose bushes, zinnia, porcelain vine, & hibiscus. In 2016 I finally gave up my last English rose, in utter disgust, as I viewed stacks of beetles 5 to 6 insects deep, eating the buds within minutes.
They prefer the flower petal to the leaf, but when the flowers are gone, they go for the leaves with gusto.
I knock them from the plant, they fall dazed to the brick walkway and I step on the carpet of beetles with brief satisfaction.
In my heart I know to have such large populations of insects is a sign I have an ecosystem that is out of balance. I do not have the proper check & balance of prey/predator.
I used Bt at the onset of the invasion years ago, but as the above article states, the insect flies in from other locations (nearby soy bean fields are covered with the beetles).
Does anyone know if there is a beneficial insect to work against the Japanese beetle?
"Things won are done, joy's soul lies in the doing." Shakespeare
Name: Yardenman
Maryland (Zone 7a)
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Yardenman
Oct 8, 2017 10:35 PM CST
I used to have Japanese Beetles. But 10 years ago, I applied milky spore powder 3 years in a row. I haven't seen one since.
Name: Linda
Omaha, N.E (Zone 5b)
Always room to plant one more!
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Freedombelle
Oct 11, 2017 6:56 PM CST
Katy, satisfying as it is to knock em down and smash them from what I read smashing them is a very bad idea because the smashed females emit a scent that makes the boys come running!
You can complain because roses have thorns, or you can rejoice because they have roses!
Name: Tina
Greenup, Ky (Zone 6b)
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beenthere
Oct 16, 2017 3:00 AM CST
I removed all my Coneflowers last fall. That's the only thing that was different this year, and I only saw a few JB's. They used to be a constant battle and the damage was significant. I can only believe that what you grow matters also. No more free meals in my garden.
Name: Rj
Just S of the twin cities of M (Zone 4b)
Garden Ideas: Level 1 Plant Identifier Million Pollinator Garden Challenge
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crawgarden
Oct 16, 2017 8:56 AM CST
Unfortunately I have found that JBs are an equal opportunity consumer of all plants: Cannas, elephant ears, dahlias and roses, my coneflowers were not touched.
Prudence, indeed, will dictate that Governments long established should not be changed for light and transient causes; and accordingly all experience hath shewn, that mankind are more disposed to suffer, while evils are sufferable, than to right themselves by abolishing the forms to which they are accustomed.
Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
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Weedwhacker
Oct 16, 2017 10:40 AM CST
I'm happy to say that we've never seen any JBs around here... but on the other hand I said the same thing about squash vine borers a couple of years ago -- and then they showed up. D'Oh!
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Name: Tia Doskocil
Texas
tiadoskocil
Oct 17, 2017 6:24 AM CST
awesome article, thanks for sharing!
Name: Linda
Omaha, N.E (Zone 5b)
Always room to plant one more!
Cat Lover Birds Region: Nebraska Butterflies Hummingbirder Bookworm
Critters Allowed Houseplants Garden Ideas: Level 1
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Freedombelle
Oct 18, 2017 10:12 AM CST
crawgarden said:Unfortunately I have found that JBs are an equal opportunity consumer of all plants: Cannas, elephant ears, dahlias and roses, my coneflowers were not touched.


Gosh darnit! I had plans of my first plantings ever of Cannas next spring, but also had a plan of planting what the J.B do not desire, so guess that may nix that idea. On the other hand if I do not attempt it I will never know the outcome. Guess between now and next season I have plenty of time to ponder this.

You can complain because roses have thorns, or you can rejoice because they have roses!
Name: Mac
Soon to be MidCoast, ME (Zone 6a)
Ex zones 4b, 8b, 9a, 9b
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McCannon
Oct 18, 2017 7:55 PM CST
This year our JBs were primarily attracted to Morning Glory and pole beans.
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Name: Linda
Omaha, N.E (Zone 5b)
Always room to plant one more!
Cat Lover Birds Region: Nebraska Butterflies Hummingbirder Bookworm
Critters Allowed Houseplants Garden Ideas: Level 1
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Freedombelle
Oct 18, 2017 8:04 PM CST
McCannon said:This year our JBs were primarily attracted to Morning Glory and pole beans.


They were never on my Morning Glories, they must of liked the Four O Clocks better, that was ok, toxic to those nasty pests.

You can complain because roses have thorns, or you can rejoice because they have roses!
Name: Linda
Omaha, N.E (Zone 5b)
Always room to plant one more!
Cat Lover Birds Region: Nebraska Butterflies Hummingbirder Bookworm
Critters Allowed Houseplants Garden Ideas: Level 1
Image
Freedombelle
Oct 18, 2017 8:08 PM CST
http://homeguides.sfgate.com/m...

This will tell you about the Four O Clocks and the Japanese Beetles
You can complain because roses have thorns, or you can rejoice because they have roses!

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