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 <[email protected]> wrote:
> What about mating disruption for LAW?
>
> Lorraine Los
> Retired UConn IPM Specialist
>
> On Aug 5, 2013, at 1:06 PM, David Kollas <[email protected]> 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 <[email protected]> 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 <[email protected]>
>>> 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 <[email protected]> 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 [email protected]
>>>> 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 <[email protected]>
>>>> Reply-To: Apple-crop discussion list <[email protected]>
>>>> Date: Fri, Aug 2 10:44 AM
>>>> To: Apple-crop discussion list <[email protected]>
>>>> 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: [email protected]
>>>>> http://hudsonvf.cce.cornell.edu/bmsb1.html
>>>>> http://web.entomology.cornell.edu/jentsch/links.html
>>>>> From: [email protected]
>>>>> [[email protected]] on behalf of David Kollas
>>>>> [[email protected]]
>>>>> Sent: Wednesday, July 31, 2013 8:50 PM
>>>>> To: [email protected]
>>>>> 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 <[email protected]>
>>>>>> Date: July 31, 2013 9:08:52 AM EDT
>>>>>> To: Apple-crop discussion list <[email protected]>
>>>>>> Bcc: Kollas David <[email protected]>
>>>>>> 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
>>>>> [email protected]
>>>>> http://virtualorchard.net/mailman/listinfo/apple-crop
>>>>
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>>>
>>>
>>>
>>> --
>>> Art Kelly
>>> Kelly Orchards
>>> Acton, ME
>>>
>>> _______________________________________________
>>> apple-crop mailing list
>>> [email protected]
>>> 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
>>> [email protected]
>>> http://virtualorchard.net/mailman/listinfo/apple-crop
>>
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