[NAFEX] Japanese Beetle (JB) Attack

BRosholdt rosholdt at erols.com
Tue Jul 25 19:59:41 EDT 2006

I called Dr. McBug, and because I am not large scale, the Spring Tiphia wasp was a lot over my budget.  He told me that we probably had the wasp up in the Tulip Poplars and on the Forsythias, however they don't fly far and the Tulip Poplars are 50' in the air - so that is where the wasps are.  I immediately started planting forsythia.  Maybe I can coax 'em down into the orchard!

If you call Dr. McBug, he will probably also tell you that the Hb Nematode may help with controlling the beetle. In Japan, there is not much problem with the JB, but they have over 65 things that eat the JB!  We have few.  I understand Sevin works on the beetle, but am loath to take that up, because now I have several million nematodes depending on me to treat them right!  To see what a grub looks like under nematode attack (it's creepy) see:  http://www.landscapemanagement.net/landscape/article/articleDetail.jsp?id=88433

Barbara Rosholdt
Zone 6b-7a Central Virginia
The Dome Place

Re: [NAFEX] Japanese Beetle Damage
Chex <ricechex at rocketmail.com>
Fri, 21 Jul 2006 11:43:38 -0700 (PDT)

nafex at lists.ibiblio.org

"What really is needed is a comprehensive regional
approach to the Japanese Beatle wich involves the
release of a fly and the Spring Tiphia Wasp wich
lays its eggs in the larva of the japanese
beatle.  Each Spring Tiphia Wasp that is born
represents a dead Japanese Beatle. The Wasp eats
aphids when not laying eggs in JB Grubs.  Food
plants that support aphid growth must be present.
 The best thing about them is that they can fly
out for miles and search out maternity hosts that
die as a result as far as any Japanese Beatles
range that could make it to your plants.  They
will also breed and increase their range.

Richard C. McDonald, Ph.D. Says,
 - "With adequate food plants nearby (this is a
must), and no toxic chemicals inthe ground, the
Spring Tiphia can parasitize up to 2/3rds of a
population of Japanese beetle or Oriental beetle
grubs.  Its period of activity ranges from April
through June, depending upon the location.  A
well-fed wasp can lay over 70 to 120 eggs during
her lifespan of 6 to 8 weeks.  The spring Tiphia
was considered by USDA researchers to be the most
effective parasitoid of the Japanese beetle
throughout its range." - 

The USDA released these wasps on the east coast
decades ago but has completely abandoned the
midwest.  I think that the Japanese Beatle should
be treated as a National Disaster and that
Biological Warfare should be declared upon these
foriegn invaders!

To learn more about the Spring Tiphia go to:


Or contact:
Richard C. McDonald, Ph.D.
Symbiont Biological Pest Management
194 Shull's Hollar
Sugar Grove, NC 28679
(828) 297-BUUG (2884) Phone
email: the_edge at goboone.net

He can get you the Spring Tiphia wasp for release
in your area.

Chris Rice
zone 5, IL (heavily infested with Japanese
beatles now)

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