Lorraine
In the past, my insecticides timed for Apple Maggot nearly always
prevented second generation LAW damage, and always did if
at least one of those sprays was applied in the last half of August. Having
been alerted to the success with mating disruption of Oriental Fruit Moth and
LAW, I will look into mating disruption next year. I could have tried it this
year, as just today I re-discovered Deborah;s
notice of it in the first issue of this year's Scaffolds Fruit Journal, dated
March 25. http://www.scaffolds.entomology.cornell.edu/2013/ page 9-10.
"This... (Isomate OFM TT Pacific Biocontrol, EPA Reg. No. 53575-29)…twin-tube
tie dispenser has a field life of 180+ days, and is therefore being recommended
for full-season mating disruption of oriental fruit moth and lesser appleworm
in all tree fruits."
David
On Aug 6, 2013, at 4:08 PM, llbuglady <llbugl...@gmail.com> wrote:
> David,
>
> I have not been following the LAW research since retirement. I was hoping
> someone would jump in and see that Deborah Breth mentioned the use of Isomate
> mating disruption for OFM might have effect on LAW. Does anyone else have
> any research or observations?
>
> Lorraine Los
> Retired UConn IPM Specialst
>
> On Aug 5, 2013, at 9:03 PM, David Kollas <kol...@sbcglobal.net> wrote:
>
>>
>>
>> Lorraine:
>>
>> Thanks for bringing that up. I was thinking of using a sex pheromone
>> lure on a sticky trap to monitor LAW, As I recall,
>> you have said that Lesser Appleworm is attracted to the lure used for
>> another moth; which moth lure would LAW males go for?
>> Or do you think a true disruption attempt could replace insecticide?
>>
>> David
>>
>> On Aug 5, 2013, at 3:25 PM, llbuglady <llbugl...@gmail.com> wrote:
>>
>>> What about mating disruption for LAW?
>>>
>>> Lorraine Los
>>> Retired UConn IPM Specialist
>>>
>>> On Aug 5, 2013, at 1:06 PM, David Kollas <kol...@sbcglobal.net> wrote:
>>>
>>>> Glen:
>>>>
>>>> My glee at the minimal captures of Apple Maggot on this farm is
>>>> tempered by my history of Lesser Appleworm. It has produced significant
>>>> damage to fruit when I have omitted insecticide in August. Now I am
>>>> thinking that LAW traps may be needed to justify the insecticide.
>>>>
>>>> David Kollas
>>>> Kollas Orchard
>>>> Tolland, CT
>>>>
>>>>
>>>> On Aug 5, 2013, at 8:35 AM, Glen Koehler <glen.koeh...@maine.edu> wrote:
>>>>
>>>>> Hi Art
>>>>> See paragraph in last newsletter. Bottom line is sugar should also
>>>>> increase efficacy of Assail and possibly Delegate against AM but nobody
>>>>> knows if there would be other problems created by spraying sugar on
>>>>> apples. I find the slow start to AM catches perplexing. Only
>>>>> speculation I have to explain it is that they suffered high mortality in
>>>>> winter. But that might be wishful thinking. Next few weeks will tell.
>>>>> - Glen
>>>>>
>>>>> On Sun, Aug 4, 2013 at 8:45 AM, Arthur Kelly <kellyorcha...@gmail.com>
>>>>> wrote:
>>>>> There is a recommendation to add sugar when making an application of
>>>>> Assail for SWD on berries to stimulate feeding. 1-2 lbs per hundred gal.
>>>>> What about for apples when using Assail or Delegate for instance? My
>>>>> understanding is that when first emerged the flies feed. FYI we trapped
>>>>> the first AM fly on 8/2 here. Only one on five traps.
>>>>>
>>>>> Art Kelly
>>>>> Kelly Orchards
>>>>> Acton, ME
>>>>>
>>>>>
>>>>> On Fri, Aug 2, 2013 at 1:33 PM, David Kollas <kol...@sbcglobal.net> wrote:
>>>>>
>>>>>
>>>>> Thank you, Art. It is always better to know whether the most-informed
>>>>> have the answers; or whether, instead, they are not sure either.
>>>>>
>>>>> The uncertainty that Reissig expressed in his paper of 2003 apparently
>>>>> continues now ten years later. In that paper he indicated the need for
>>>>> additional research to assess practical aspects of replacing
>>>>> organophosphates with newer chemistries in commercial orchards.
>>>>>
>>>>> A practical aspect of using Calyso or Assail in leu of Imidan that is
>>>>> separate from their mode of action on Apple Maggot, is the
>>>>> question of how to incorporate them into a label-compliant
>>>>> resistance-management program that includes control of many pests in
>>>>> addition
>>>>> to Apple Maggot.
>>>>>
>>>>> David
>>>>>
>>>>>
>>>>>
>>>>> On Aug 2, 2013, at 11:53 AM, Arthur M. Agnello wrote:
>>>>>
>>>>>> Hi David,
>>>>>>
>>>>>> Harvey Reissig did a study on the efficacy of some of the newer products
>>>>>> against apple maggot, and published it some years ago:
>>>>>>
>>>>>> Reissig, W. Harvey. 2003. Field and Laboratory Tests of New
>>>>>> Insecticides Against the Apple Maggot, Rhagoletis pomonella (Walsh)
>>>>>> (Diptera: Tephritidae). Journal of Economic Entomology 96 (5):
>>>>>> 1463-1472 — I will send you a pdf of it in a separate email.
>>>>>>
>>>>>> However, his general findings were that there are no new insecticides
>>>>>> that are as effective in controlling AM as the organophosphates,
>>>>>> particularly in “high pressure situations”. It is also true that most
>>>>>> of the new materials are not as directly toxic to the flies as the OPs,
>>>>>> and the efficacy of many these new materials appears to be due to their
>>>>>> ability to prevent flies from ovipositing as long as they are in contact
>>>>>> with their residues. We really don’t know the mechanism of this mode of
>>>>>> action, but in many laboratory bioassays the flies will not lay eggs on
>>>>>> treated apples, although they remain alive. So far, we would say that
>>>>>> in most normal US orchards, which are presumed to be initially free from
>>>>>> internal AM infestations and are not near abandoned orchards and other
>>>>>> large sources of unsprayed host trees, we have not seen control failures
>>>>>> or even increased damage in orchards that are not treated with
>>>>>> organophosphates, although AM catches in monitoring traps placed along
>>>>>> the edges of these orchards appears to be higher than when they were
>>>>>> sprayed with organophosphates.
>>>>>>
>>>>>> As far as efficacy, Calypso is definitely the most effective of the new
>>>>>> insecticides, followed by Assail. Delegate and Altacor also have some
>>>>>> activity, but would probably not provide control in orchards with
>>>>>> internal infestations or those that are near heavy unsprayed sources of
>>>>>> infestations.
>>>>>>
>>>>>> Art
>>>>>>
>>>>>> --
>>>>>> Arthur M. Agnello
>>>>>> Professor and Extension Tree Fruit Entomologist
>>>>>> Dept. of Entomology a...@cornell.edu
>>>>>> N.Y.S. Agric. Expt. Sta. Tel: 315-787-2341
>>>>>> 630 W. North St. Fax: 315-787-2326
>>>>>> Geneva, NY 14456-1371
>>>>>> http://web.entomology.cornell.edu/agnello/links.html
>>>>>> Scaffolds Fruit Journal online:
>>>>>> http://www.scaffolds.entomology.cornell.edu/index.html
>>>>>>
>>>>>> From: Dave Kollas <kol...@sbcglobal.net>
>>>>>> Reply-To: Apple-crop discussion list <apple-crop@virtualorchard.net>
>>>>>> Date: Fri, Aug 2 10:44 AM
>>>>>> To: Apple-crop discussion list <apple-crop@virtualorchard.net>
>>>>>> Subject: Re: [apple-crop] Residual pesticide activity
>>>>>>
>>>>>>
>>>>>> Thank you for that, Peter.
>>>>>>
>>>>>> I suppose that if the systemic activity of neonics is sufficient to kill
>>>>>> Apple Maggot eggs or larvae during a (two week?) period after
>>>>>> application,
>>>>>> and up to 2 inches rainfall, they could be expected to be as good as
>>>>>> Imidan or Guthion, regardless of whether the adults are killed by fruit
>>>>>> or foliar contact.
>>>>>> Or, perhaps female flies are killed by ovipositor contact with systemic
>>>>>> neonic during egg insertion? My guess is that such studies have not
>>>>>> been made.
>>>>>>
>>>>>> David Kollas
>>>>>>
>>>>>> On Aug 2, 2013, at 8:55 AM, Peter J. Jentsch wrote:
>>>>>>
>>>>>>> Hi David,
>>>>>>>
>>>>>>> John Wise, Michigan State University, Department of Entomology, wrote a
>>>>>>> very nice piece on the 'Rainfast characteristics of fruit crop
>>>>>>> insecticides' that might help to answer these questions. It was posted
>>>>>>> on June 3, 2013.
>>>>>>>
>>>>>>> http://msue.anr.msu.edu/news/rainfast_characteristics_of_fruit_crop_insecticides
>>>>>>>
>>>>>>> All the best,
>>>>>>>
>>>>>>>
>>>>>>> Peter J. Jentsch
>>>>>>> Senior Extension Associate - Entomology
>>>>>>> Department of Entomology
>>>>>>> Cornell University’s Hudson Valley Lab
>>>>>>> P.O. Box 727, 3357 Rt. 9W
>>>>>>> Highland, NY 12528
>>>>>>>
>>>>>>> Office: 845-691-7151
>>>>>>> Cell: 845-417-7465
>>>>>>> FAX: 845-691-2719
>>>>>>>
>>>>>>> E-mail: p...@cornell.edu
>>>>>>> http://hudsonvf.cce.cornell.edu/bmsb1.html
>>>>>>> http://web.entomology.cornell.edu/jentsch/links.html
>>>>>>> From: apple-crop-boun...@virtualorchard.net
>>>>>>> [apple-crop-boun...@virtualorchard.net] on behalf of David Kollas
>>>>>>> [kol...@sbcglobal.net]
>>>>>>> Sent: Wednesday, July 31, 2013 8:50 PM
>>>>>>> To: apple-crop@virtualorchard.net
>>>>>>> Subject: [apple-crop] Fwd: Residual pesticide activity
>>>>>>>
>>>>>>> Perhaps the sending address I used this morning was wrong. I am trying
>>>>>>> another now.
>>>>>>>
>>>>>>> Begin forwarded message:
>>>>>>>
>>>>>>>> From: David Kollas <kol...@sbcglobal.net>
>>>>>>>> Date: July 31, 2013 9:08:52 AM EDT
>>>>>>>> To: Apple-crop discussion list <apple-crop@virtualorchard.net>
>>>>>>>> Bcc: Kollas David <kol...@sbcglobal.net>
>>>>>>>> Subject: Residual pesticide activity
>>>>>>>>
>>>>>>>> All:
>>>>>>>> Surely others know the answer to this question. I must have missed it
>>>>>>>> somewhere. Does the systemic activity of
>>>>>>>> absorbed neonicotinoid sprays Assail and Calypso replace the surface
>>>>>>>> residual that continues to kill Apple Maggot flies
>>>>>>>> entering an Imidan or Guthion-treated orchard days after the
>>>>>>>> application? Do the neonics provide residual control only by
>>>>>>>> systemic tissue-presence which the insect must consume? Or do Apple
>>>>>>>> Maggot flies get enough active ingredient through
>>>>>>>> their "feet" to kill them on days-old neonic treatments?
>>>>>>>> The question is relevant in choosing whether, and what pesticide to
>>>>>>>> apply prior to forecast thunderstorms that can
>>>>>>>> remove surface residues.
>>>>>>>>
>>>>>>>> David Kollas
>>>>>>>> Kollas Orchard, Tolland, CT
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> apple-crop mailing list
>>>>>>> apple-crop@virtualorchard.net
>>>>>>> http://virtualorchard.net/mailman/listinfo/apple-crop
>>>>>>
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>>>>>> apple-crop mailing list
>>>>>> apple-crop@virtualorchard.net
>>>>>> http://virtualorchard.net/mailman/listinfo/apple-crop
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> apple-crop mailing list
>>>>> apple-crop@virtualorchard.net
>>>>> http://virtualorchard.net/mailman/listinfo/apple-crop
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Art Kelly
>>>>> Kelly Orchards
>>>>> Acton, ME
>>>>>
>>>>> _______________________________________________
>>>>> apple-crop mailing list
>>>>> apple-crop@virtualorchard.net
>>>>> http://virtualorchard.net/mailman/listinfo/apple-crop
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Glen Koehler
>>>>> University of Maine Cooperative Extension
>>>>> Pest Management Office
>>>>> Voice: 207-581-3882
>>>>> 491 College Avenue, Orono, ME 04473
>>>>> _______________________________________________
>>>>> apple-crop mailing list
>>>>> apple-crop@virtualorchard.net
>>>>> http://virtualorchard.net/mailman/listinfo/apple-crop
>>>>
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