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 >>>> >>>> _______________________________________________ >>>> 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 >> >> _______________________________________________ >> 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
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