When dates of count and application were the same, counts were made prior to applications of the insecticide. Transformed mean number of wingless aphids/20 plants foliar application. What Does Aphid Damage Look Like? Lester, Philip J. Howardh, J.J. Karley, A. J. Karley, A.J. No statistical differences were found during this trial all season. The total monthly rainfall for Jun, Jul, and Aug was, respectively, 3.51, 5.77, and 5.12 inches, and the mean temperature was 61°F, 66°F, and 65°F. The experimental design was successful at significantly reducing the numbers of Carabidae in the enclosures compared with the open plots. Blackhawk (2.0 oz/acre) was applied to all treatments on 08 Jul to prevent excessive defoliation by Colorado potato beetles. These results suggest that the Carabidae play a relatively minor role in aphid control on the potato crop compared with specific predators. For full access to this pdf, sign in to an existing account, or purchase an annual subscription. 2003. The potato aphid is a common brown aphid. Les populations de pucerons tendaient à être plus élevées dans les parcelles dont les populations de Carabidae avaient été réduites que dans les zones de contrôle et étaient significativement plus élevées dans les parcelles où l’insecticide avait réduit l’abondance des prédateurs au niveau du feuillage des plants. Alam for this article. * Views captured on Cambridge Core between . Aphids can be sampled by examining leaves. Macrosiphum euphorbiae is a vector of about one hundred plant viruses. Ramzy, Adel The seed was hand placed at 12 inch spacing. The abundance of aphids was monitored in the enclosed plots and in unenclosed areas serving as control. The crop was planted on 25 May using hand cut ‘Shepody’ potato seed. and Aroostook Farm, 59 Houlton Road, Presque Isle, ME 04769. View all Google Scholar citations Usage data cannot currently be displayed. Means in a column followed by the same letter are not significantly different (LSD, P > 0.05). and 2004. and The experiment was c © The Authors 2017. A John Deere 216 two row potato planter was used to make open furrows applying 1,100 pounds of 14-14-14 fertilizer per acre. Ces résultats suggèrent que le rôle des Carabidae polyphages dans le contrôle des pucerons sur pomme de terre est secondaire par rapport aux prédateurs spécifiques. The soil was classified as Caribou Gravely Silt Loam, pH 6.0. Vernon, Robert S. A 10 ft space was left fallow between blocks and a 6 ft space was left fallow between the plots within the blocks. We did not find any evidence of Stylet oil interference with insecticides. ., S.U. Holtzer, Thomas O. Be aware that in spring aphid populations often build up before natural enemies are active in sufficient numbers and then give good control. NATIVE PREDATORS AND THE CONTROL OF POTATO APHIDS - Volume 118 Issue 11 - Gilles Boiteau 2004. This research was supported by industry gifts of pesticides and money. The potato aphid is a common and highly polyphagous species. Email your librarian or administrator to recommend adding this journal to your organisation's collection. Messing, R. H. The purpose of the first experiment (Table 1) was to test the compatibility of aphicides with crop oil to control the aphid population. Close this message to accept cookies or find out how to manage your cookie settings. Search for other works by this author on: University of Maine, 5751 Murray Hall Room 100, Orono, ME 04469. ., M.Z. and Use finger and thumb to squash aphid colonies where practical; Encourage the natural enemies of aphids in the garden, such as ladybirds, ground beetles, hoverflies, parasitoid wasps and earwigs. Une étude a été faite dans des champs de pomme de terre à Frédéricton au Nouveau-Brunswick en 1981, 1982 et 1984 pour déterminer l’effet des prédateurs indigènes sur l’abondance des pucerons. Bousquet, Yves 2000. 2000. Analysis of variance was conducted following transformation of the data using log10(X + 1) and means were compared using Fisher’s least significant difference (LSD) test. ... Hosing down your plants is one way to control the aphid … 2001. Photo credit: GrowVeg.com. ., M.M. It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide, This PDF is available to Subscribers Only. Salama, Mohammed S. and and Straub, R. W. Published by Oxford University Press on behalf of Entomological Society of America. Le dispositif expérimental a permis de réduire significativement l’abondance des Carabidae dans les enceintes par rapport aux parcelles sans barrières. Foliar insecticide applications were made with a modified Century boom sprayer, eight nozzles per rep, 40 gpa at 35 psi, boom height 20–24 inches, and tractor speed 3 mph. Published online by Cambridge University Press: URL: /core/journals/canadian-entomologist. Myzus persicae, known as the green peach aphid, greenfly, or the peach-potato aphid, is a small green aphid.It is the most significant aphid pest of peach trees, causing decreased growth, shrivelling of the leaves and the death of various tissues. The ability of aphids to spread viruses makes it very important to continue testing new chemistries and the efficacy of existing compounds. Abd-El-Sam, Emtithal M. The rows were mechanically covered, placing the seed piece approximately 3 inches below the surface. Pitchford, J. W. Experiments were done in fields of potato in Fredericton, New Brunswick, in 1981, 1982, and 1984 to determine the effect of native predators on the abundance of aphids. Douglas, A.E. Lamb, Robert J. Ahmed and Means followed by the same letter do not significantly differ from each other (P = 0.05). AliNiazee, M. T. Ahmed Phone: (207) 581-2551, Fax: (207) 581-02537, (. Monitoring of aphid flights is useful for seed producers who may wish to intensify aphid control when winged aphids begin to be detected in fields or traps. Ibrahim, Mary T. The peach potato aphid is one of the most common greenfly pests within the UK, particularly on tender succulent plants that are grown within greenhouses. Boiteau, Gilles L’abondance des pucerons était évaluée dans les parcelles entourées de barrières et dans les parcelles sans barrières qui servaient de contrôles. On a varié les populations de prédateurs en plaçant des pièges de Barber à l’intérieur de parcelles expérimentales entourées de barrières de polyéthylène et en appliquant un insecticide sélectif.