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Jonkers, Laurence, 2013. Impact of wood ants on the spatial distribution and feeding by the pine weevil. Second cycle, A2E. Uppsala: SLU, Dept. of Ecology

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Abstract

The pine weevil (Hylobius abietis (L.)) is one of the most destructive pests in Swedish conifer plantations. Many efforts have been made to reduce its damage by the use of insecticides, planting site preparation, physical barriers and other management practices. A number of studies show the importance of ants in pest management in different systems. In this study I test the hypothesis that a high density of ants reduces damage on conifer seedlings by the pine weevil.

The study was conducted on two clearcut areas in the Lunsen forest S of Uppsa-la, Sweden. In total, 900 Norway spruce seedlings (Picea abies (L.) Karst.) were planted (divided into plots with 25 seedlings) and different measures of the weevil’s damage were assessed, i.e. proportions of attacked and girdled seedlings, and mean feeding area. Densities of the ant species Formica polyctena and Myrmica ruginodis were obtained weekly by pitfall traps placed in each planting plot. No significant relationship between ant density and weevil damage was found when tested by means of the Spearman’s correlation. Results elucidating the process of pine weevils damaging seedlings are reported.

Main title:Impact of wood ants on the spatial distribution and feeding by the pine weevil
Authors:Jonkers, Laurence
Supervisor:Nordlander, Göran
Examiner:Lindelöw, Åke
Series:Självständigt arbete/Examensarbete / SLU, Institutionen för ekologi
Volume/Sequential designation:2013:5
Year of Publication:2013
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:None
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Keywords:integrated pest management (IPM), forest regeneration, conifer seedling, Formica polyctena, Myrmica ruginodis, Hylobius abietis
URN:NBN:urn:nbn:se:slu:epsilon-s-2147
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-s-2147
Subjects:Pests of plants
Animal ecology
Language:English
Deposited On:12 Apr 2013 14:23
Metadata Last Modified:12 Apr 2013 14:23

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