[Market-farming] Raspberry pests

Richard Moyer ramoyer at gmail.com
Thu Aug 16 14:59:06 EDT 2012


Marlin and Christine,
We in VA have a state entomologist, among whose duties is to identify
agricultural pests.
There are keys that help entomologists identify insects at all life stages,
including the larval (worm) stage.  (One of my summer jobs was identifying
thousands of insects, one at a time, under a low power microscope.)

So for your pest(s), I would catch the offending 'worms', put them in an
alcohol/water solution, in a small jar, and take to your county ag
extension agent.  Our tax dollars are at work to enable these services.
 You may also benefit from a visit, since these are causing economic damage.

A positive ID, by VA Tech extension, would help the rest of us in VA and
neighboring areas.

How you choose to manage the pests are up to you.  Once you have a certain
ID on the pest, and hence its life cycle, control strategies are much more
effective.

Hope you get it figured out,
Richard Moyer
SW VA

On Thu, Aug 16, 2012 at 12:00 PM,
<market-farming-request at lists.ibiblio.org>wrote:

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>    1. Re: New Raspberry pest-back again with a vengance
>       (Marlin Burkholder)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 15 Aug 2012 15:26:58 -0400
> From: Marlin Burkholder <burkholders at glenecofarm.com>
> Subject: Re: [Market-farming] New Raspberry pest-back again with a
>         vengance
> To: Market Farming <market-farming at lists.ibiblio.org>
> Message-ID: <CC517042.668D%burkholders at glenecofarm.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> This is Christine describing what I see.
> We do not see pests or flies on our raspberries.  One of our pickers saw
> some little moths.  I have seen a few bugs which look like squash bugs, but
> have extra fuzz on their hind upper legs.
> Over the years, we have had the cane bore make the 2 rings around the top
> canes and we would break them off and not have damage to canes.  This year,
> in addition to some of that, we have whole canes wilting and dying from the
> bottom.  They will have a clean break near the bottom of the cane.  When
> one
> goes to remove the cane,  It appears that a bore has laid eggs or cut one
> ring around the stalk.
> I tried to get the maggots to hatch out, but they molded on the sides of
> the
> plastic jar after 2 weeks.  We are trying again.
> Christine & Marlin
>
>
> On 8/15/12 9:45 AM, "Shoemaker, William H" <wshoemak at illinois.edu> wrote:
>
> > IF it is Spotted Wing Drosophila it is pretty susceptible to
> insecticides. The
> > problem is that you probably have every stage of the insect present;
> eggs,
> > larvae, pupa and adult. You'll need to spray more than once to get them
> under
> > control. Because it has a short life cycle, spraying twice 4-5 days
> apart may
> > be enough, but I suspect another spray may be necessary. But that still
> > doesn't address migration of new adults into your patch from adjacent
> areas.
> > You may need to spray continuously to address this pest, perhaps putting
> on
> > new sprays every 5-7 days.
> >
> >
> >
> > However, looking at this as an opportunity, if you don't spray you'll
> lose the
> > crop and suffer despair about ever growing it again. Why not turn this
> into an
> > opportunity to learn what works? If the insect is pretty easy to kill,
> why not
> > try several choices, focusing on the least threatening insecticides
> first? You
> > could try Pyganic and Entrust to see how well they control it. These are
> OMRI
> > approved and have a history of some efficacy on a number of insects. You
> could
> > alternate sprays of each, which would reduce the risk of resistance
> > development. That's important with an insect like this with a short life
> > cycle. You could throw Neem, or Azidarachtin, into the spray cycle to
> see if
> > it works, though I'd be a little concerned about the smell. If you're not
> > growing organically, Malathion is effective and shouldn't affect bees.
> > Unfortunately I think Pyganic will affect the bees.
> >
> >
> >
> > Sorry to hear you're dealing with this again. I'm afraid we all will be
> before
> > long.
> >
> >
> >
> > Bill
> >
> > William H. Shoemaker,
> >
> > Northern Illinois Viticulturist - IGGVA
> >
> > Illinois Grape Growers and Vinters Association
> >
> > wshoemak at illinois.edu
> >
> >
> > From: market-farming-bounces at lists.ibiblio.org
> > [market-farming-bounces at lists.ibiblio.org] on behalf of Marlin &
> Christine
> > Burkholder [burkholders at glenecofarm.com]
> > Sent: Tuesday, August 14, 2012 8:45 PM
> > To: 'Market Farming'
> > Subject: [Market-farming] New Raspberry pest-back again with a vengance
> >
> >
> > The new no see-um fruit fly which first made an appearance on our
> Virginia
> > farm last summer is back again, with a vengeance!  I had considered
> spraying
> > an insecticide as the crop started into bloom in July but backed off
> when I
> > saw the number and variety of bees and other pollinators on the plants.
>  I
> > opted instead to inspect the plants with a magnifying glass in search of
> the
> > offending flies to see if I could make a positive identification before
> > bringing in the bombs.  I never could see anything that looked like the
> > spotted wing drosophila which I have been suspecting is the culprit.
> >
> > Now the first flush is ripening and at least 90% of the ripe fruit is
> mushy
> > soft, crawling with maggots, and unfit to harvest.  If there is no way of
> > rescuing the remaining unripe fruit there will be no reason to attempt
> > harvesting any more of the crop.  It looks like we can consider the crop
> a
> > 100% failure.  I am considering bombing them immediately and waiting a
> week or
> > more to begin harvesting.  Anything ripe now or going to ripen within
> the next
> > week or two would be given a goodbye kiss.  Does anyone think this has a
> > chance of working?  Would insecticide hitting the infested berries still
> > hanging on the vines kill the maggots and help reduce the pest load next
> year?
> > Would I also need to soak the ground under the plants to get maggots on
> the
> > fallen berries?  When are the berries being infested?  At bloom or
> > preripening?
> >
> > The only professional beekeeper still operating in our county happens to
> be a
> > next door neighbor.  He is struggling with all the new issues confronting
> > beekeeping, including ?colony collapse disorder? believed to be caused by
> > environmental poisoning.  I do not wish for my activities to contribute
> to his
> > demise!
> >
> > Fall red raspberries have in the past been one of our cornerstone income
> > generating crops.  Should I attempt a rescue maneuver now or should I
> write it
> > off this year and plan to go after it early next season?
> >
> > This thing is hurting us far more than the BMSB invasion that has had
> everyone
> > stewing for the past two years!
> >
> > Marlin Burkholder
> >
> >
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