Brown, John J.

Pszczolkowski, Maciej A.

Undetermined

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Abstracts of the 7f Annual Western OrchardPest &DiseaseManagement ConferenceChemical Control/New ProductsControl of codling moth in organic pear orchardsRachel B. ElkinsUniversity of California Cooperative Extension, Lake County, Lakeport, CAAbstract: A replicated single-tree trial was carried out in a mature Bartlett pear orchard in the third year oftransition to becoming certified organic. Treatments were each applied using a hand-gun at dilute (about300 gpa) rates to five trees in a randomized complete block design down the most upwind row in theorchard, bordered by walnuts. Codling moth (CM) pressure was high in 2001, thus likely assuringmeasurable results. The entire orchard was treated with the Suterra CM Puffer for CM mating disruption(MD). Chemical treatments included Surround® (kaolin clay), Surround® to June 19 followed by 415 oil,415 oil, two rates of Pyganic 1.4 EC® plus Nufilm P (pyrethrin), two rates ofGF-773 (spinosad) plus 1%415 oil, and untreated control (MD only). Treatments were applied 6-9 times and timed for each CMflight through July 12. CM eggs and damage were sampled through the season and percent control vs.untreated calculated. Ten leaves per tree were sampled biweekly for the presence of other arthropods.Results were significant, untreated controls averaged 5.6% CM damage just prior to harvest on July 29.Both Surround® treatment regimes and the oil program had 0% damage (100% control). GF-773-treatedtrees averaged 95% control, Pyganic 1.4 EC® averaged 57% (2 pints) and 82% (4 pints), respectively.Damage on August 20, after the 2B flight, increased to 16% in untreated controls, but control remained at100% in Surround®, oil, and GF773 (73 gms.) treatments, and 94% for GF773 (109 gms.), indicating thelongevity of these treatments. Damage in the Pyganic 1.4 EC® (2 pint)-treated trees was higher than inuntreated controls and gave only 44% control at the 4 pint rate, indicating the very short residual of thismaterial. These results indicate that integrated programs of CM MD combined with various combinationsof Surround®, oil, and spinosad can effectively control CM in organic pear orchards, but this hypothesismust be tested on a wider scale using grower equipment.Chemical Control/New ProductsFeeding stimulant that mimics monosodium glutamate and has improved rain-fastnessMaciej A. Pszczolkowski and John. J. BrownWashington State University, Department of Entomology, Pullman, WAAbstract: Recently we showed that monosodium glutamate (MSG) enhances spinosad's activitythrough stimulation of feeding and pesticide intake by neonates of codling moth. However,becauseof its moderate rain-fastness, MSGwaspersistent in the field only in no-rainconditions.In order to propose rain-fast alternatives for MSG we investigated glutamate relatedpharmacologyof taste perceptionby codlingmoth neonates. On the basis of this study we chooserrarcs-l-aminocyclobutane 1,3 dicarboxylate (trans-ACBD) as a candidate for feeding stimulantwith improved rain-fastness. trans-ACBD stimulates feeding in codling moth neonates, itsfeeding stimulatory properties are maintained in presence of spinosad, and addition of trans-ACBD to spinosad significantly increases its efficacy.15-17January 2003, Hilton Hotel, Portland, OR <* Publ. byWashington State Univ., Pullman, WashingtonPage 33

Feeding stimulant that mimics monosodium glutamate and has improved rain-fastness

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Feeding stimulant that mimics monosodium glutamate and has improved rain-fastness

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