?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Effects+of+autumn+kaolin+treatments+on+the+rosy+apple+aphid+Dysaphis+planaginea+(Pass.)+and+possible+modes+of+action.&rft.creator=B%C3%83%C2%BCrgel%2C+K.&rft.creator=Daniel%2C+Claudia&rft.creator=Wyss%2C+Eric&rft.subject=Crop+health%2C+quality%2C+protection&rft.description=Autumn+applications+of+the+repellent+processed-kaolin+particle+film+(Surround+%C3%82%C2%AE+WP)+might+be+an+alternative+to+the+insecticides+commonly+used+in+spring+to+control+the+rosy+apple+aphid%2C+Dysaphis+plantaginea+(Pass.)+(Hom.%2C+Aphididae).+To+assess+the+mode+of+action+and+the+impact+of+kaolin+on+autumn+forms+of+D.+plantaginea%2C+trials+were+conducted+in+field+cages+and+in+open-fields+in+autumn+2003.+Choice+and+no-choice+experiments+in+field+cages+showed+that+winged+aphids+landed+in+significantly+lower+numbers+and+gave+birth+to+significantly+fewer+females+on+kaolin-treated+branches+compared+with+the+untreated+control.+In+a+first+open-field+trial%2C+single+applications+at+10+different+dates+and+with+two+different+concentrations+of+kaolin+were+conducted+after+harvest+to+assess+the+influence+of+the+kaolin+concentration+on+the+autumn+forms+of+D.+plantaginea.+No+differences+were+found+between+the+different+concentrations+and+spraying+dates.+In+a+second+open-field+trial%2C+single+and+multiple+applications+of+kaolin+were+tested+at+different+dates+after+harvest.+Repeated+applications+of+kaolin+significantly+reduced+females+in+autumn+and+fundatrices+in+spring%2C+whereas+single+kaolin+treatments+had+no+significant+effect+on+D.+plantaginea.+None+of+the+kaolin+treatments+reduced+aphids+below+the+economic+threshold.+In+conclusion%2C+kaolin+showed+promising+results+to+control+autumn+forms+of+D.+plantaginea.+However%2C+with+a+more+detailed+forecasting+model+for+the+autumnal+flight+of+this+aphid%2C+treatments+could+be+conducted+more+precisely+and+more+effectively%2C+especially+in+years+with+exceptional+climatic+conditions%2C+such+as+in+2003.%0D%0A(Taken+rrom+http%3A%2F%2Fwww.blackwell-synergy.com%2Fdoi%2Fabs%2F10.1111%2Fj.1439-0418.2005.00968.x)&rft.date=2005&rft.type=Journal+paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F6056%2F1%2FDaniel-2005-autumn-kaolin.pdf&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F6056%2F2%2FWyss-2005-Kaolin-Dysaphis.pdf&rft.identifier=B%C3%83%C2%BCrgel%2C+K.%3B+Daniel%2C+Claudia+and+Wyss%2C+Eric+(2005)+Effects+of+autumn+kaolin+treatments+on+the+rosy+apple+aphid+Dysaphis+planaginea+(Pass.)+and+possible+modes+of+action.+[http%3A%2F%2Fwww.blackwell-synergy.com%2Fdoi%2Fabs%2F10.1111%2Fj.1439-0418.2005.00968.x.]+Journal+of+Applied+Entomology+(129+(6))%2C+pp.+311-314.&rft.relation=http%3A%2F%2Forgprints.org%2F6056%2F