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Nylander, Gustav, 2021. Efficiency of chemical and mechanical plant protection on sites without mechanical site preparation in Scania. Second cycle, A2E. Alnarp: SLU, Southern Swedish Forest Research Centre



An important part of the regeneration after clearcutting is to have a high growth and a high level of survival of the planted seedlings. A big threat to the seedlings is the pine weevil (Hylobius abietis), but the black spruce beetle (Hylastes conicularius) can cause some serious damage too, as well as Strophosoma capitatumn. Mechanical site preparation in combination with some sort of plant protection reduces the damage, but in some cases here in Sweden, mechanical site preparation is not possible due to cultural remains or technical reasons. And, with chemical protections being phased out of Swedish forestry, it’s important to understand the efficiency of mechanical plant protection compared to chemical on sites without mechanical site preparation. Therefore, the objective of this study was to see what the consequences could be when replacing chemical protection with mechanical protection on fresh or one year old clear-cuts. The results showed that seedling mortality caused by pine weevils was 3,5% for mechanical protection and 2,4% for chemical protection. The seedling mortality caused by the black spruce beetle was 3,0% for mechanical protection and 4,2% for the chemical protection. No significant difference was seen between the two treatments when looking at damage caused by pine weevil, black spruce beetle and Strophosoma capitatumn, neither did it affect total height and shoot height.

Main title:Efficiency of chemical and mechanical plant protection on sites without mechanical site preparation in Scania
Authors:Nylander, Gustav
Supervisor:Hjelm, Karin and Wallertz, Kristina
Examiner:Holmström, Emma
Volume/Sequential designation:UNSPECIFIED
Year of Publication:2021
Level and depth descriptor:Second cycle, A2E
Student's programme affiliation:SY001 Forest Science - Master's Programme 300 HEC
Supervising department:(S) > Southern Swedish Forest Research Centre
Keywords:pesticide, mechanical protection, Pine Weevil, Hylobius abietis, Black spruce beetle, Hylastes conicularius, Strophosoma capitatum, No mechanical site preparation, Norway spruce, Picea abies, Regeneration, Seedlings, Hylonox, Imprid Skog, Forester, Woodcoat, wax
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Subject. Use of subject categories until 2023-04-30.:Protection of plants - General aspects
Pests of plants
Deposited On:17 Sep 2021 08:37
Metadata Last Modified:18 Sep 2021 01:00

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