:: 2024-06-25

Effekter av torka och snytbaggeskador på plantor med olika beläggningsskydd

Läs mer >>>

:: 2024-06-09

Skyddsåtgärder mot snytbagge fungerar även mot bastborrar

Läs mer >>>

:: 2024-05-14

Ny doktorsavhandling om plantors försvar mot snytbagge

Läs mer >>>

:: 2024-04-19

Aktuell statistik från Skogsstyrelsen om levererade skogsplantor 2023

Läs mer >>>

:: 2024-01-30

Kort historik om hur beläggningsskydden ersatt insekticiderna

Presentation vid SLU Skogskadecentrums årskonferens
Läs mer >>>

:: 2023-12-10

Ny planteringsmaskin som inversmarkbereder

Läs mer >>>
Se film >>>

:: 2023-10-20

Slutgiltigt stopp för kemiska medel mot snytbagge

Läs mer >>>

:: 2023-10-02

Ny skyddsbehandling mot snytbaggeangrepp för barrotsplantor

Läs mer >>>

:: 2023-06-21

Ny forskning som kan förbättra granarnas försvar mot snytbaggar

Läs mer >>>

:: 2023-04-14

Levererade skogsplantor 2022 – statistik från Skogsstyrelsen

Läs mer >>>

:: 2023-04-11

Antalet snytbaggar kan inte förutsäga kommande skador på barrträdsplantor

Läs mer >>>

:: 2022-09-30

Aska skyddar plantor mot snytbaggen

Läs mer >>>

:: 2022-05-16

Ny finsk studie av Conniflex-skyddade plantor och högläggning

Läs mer >>>

:: 2022-04-10

Skogsstyrelsens plantstatistik för 2021

Av 450 miljoner levererade barrträdsplantor hade 52 % icke-kemiskt skydd, 3 % kemiskt skydd och 45 % ingen skyddsbehandling mot snytbagge
Läs mer >>>

:: 2022-01-17

Föryngringskollen – nytt projekt om plantöverlevnad

Läs mer (sid. 18-20) >>>

:: 2021-11-23

God effekt av beläggningsskydd efter två år

Läs mer >>>

:: 2021-11-17

Plantor av barrträd kan bli bättre på självförsvar

Läs mer >>>

:: 2021-10-27

Ny doktorsavhandling om växtförsvar mot snytbaggen

Se avhandlingen >>>

:: 2021-04-26

Principiellt viktigt domslut: insekticid mot snytbagge godkänns ej eftersom icke-kemiska alternativ är etablerade

Läs mer >>>

:: 2021-04-09

Skogsstyrelsens plantrapport för 2020

Andelen kemiskt behandlade plantor nu nere i 3 %
Läs mer >>>

:: 2021-03-15

Kan inblandning av lövträdsplantor minska snytbaggens skador på barrträdsplantor?

Läs mer >>>
Summary in English with focus on associational effects >>>

:: 2021-01-20

Metyljasmonat skyddar plantor i över ett år

Läs mer >>>

:: 2020-12-14

Åke Lindelöw får KSLA:s silvermedalj för hans sätt att förklara om insekter i skogen

Läs mer >>>

:: 2020-11-10

Snytbaggen känslig för bakteriepreparat som används för myggbekämpning

Läs mer >>>

:: 2020-10-30

Hög kvalitet på skogsföryngringarna enligt Skogsstyrelsens inventeringar

Läs mer >>>

:: 2020-06-18

Inverkan av beläggningskydd på skogsplantors tillväxt

Se examensarbete >>>

:: 2020-04-30

Bastborreskador på skyddade och oskyddade plantor i södra Sverige

Läs rapporten >>>

:: 2020-04-16

Plantstatistik från Skogsstyrelsen för 2019

Andelen insekticidbehandlade barrträdsplantor nere i 12 %
Läs mer >>>

:: 2020-03-30

Eteriska oljor från kryddväxter hindrar snytbaggars gnag

Läs mer >>>

:: 2020-03-18

Beläggningsskydd ger fullgott skydd mot snytbagge

Preliminära resultat från storskalig, praktisk studie
Läs mer >>>

:: 2020-02-27

Tidningen Skogen uppmärksammar Kristina Wallertz

Läs mer >>>

:: 2020-01-27

Finsk avhandling om snytbaggar och stubbskörd

Läs mer >>>

:: 2019-12-16

Göran Nordlander går i pension

Läs mer >>>

:: 2019-11-14

50 miljoner investeras i anläggning för produktion av SE-plantor

Läs mer >>>
Se även om SE-plantor och snytbaggeskador >>>

:: 2019-11-11

Medel för forskning om plantor och föryngring finns att söka

Läs mer >>>

:: 2019-08-30

Dubbel nytta av metyljasmonat (MeJA) i plantskolan?

Läs mer >>>

:: 2019-07-30

Beläggningsskydden Hylonox och Woodcoat granskade i examensarbete

Läs mer >>>

:: 2019-06-04

SSP bygger sin fjärde Conniflex-anläggning

Ger plantor för Norrland och Nordisk export
Läs mer >>>

:: 2019-05-09

Risken för skador av snytbagge i södra Europa

Ny studie av spanska och svenska forskare
Läs mer >>>

:: 2019-04-23

Conniflex-behandlade plantor av Douglasgran exporteras till Tyskland

Läs mer >>>

:: 2019-04-10

Produktion av skogsplantor 2018

Rapport från Skogsstyrelsen som även redovisar plantskydd
Läs rapporten >>>

:: 2019-04-09

Stopp för insekticidbehandlade plantor inom PEFC efter 2019

Läs mer >>>

:: 2019-03-26

Svenska Skogsplantor slutar helt med kemisk plantbehandling

Läs mer >>>

:: 2019-01-25

Nytt forskningsprojekt om plantskydd

Läs mer >>>


Evaluation of the quality and impact of research at SLU (KoN2018)
Impact case study presented in the self-assessment by the Department of Ecology, Faculty of Forestry:

Stem coatings on conifer plants replace insecticides

Summary of the impact
In Swedish forestry, the use of insecticides is practically restricted to protection of conifer plants against the pine weevil, Hylobius abietis. Until recently, this meant prophylactic insecticide treatment of about 150 million plants annually. Since 2010, however, the insecticides are gradually being replaced by protective stem coatings, used in combination with various silvicultural countermeasures. These new methods and management strategies largely emanate from research at the Department of Ecology, SLU. Stem coatings are now used for half of the protected seedlings, and within a few years insecticides are judged to be almost completely phased out in Swedish forestry.

Research that underpins the impact case study
For several years the Swedish forestry sector funded research conducted within the Swedish Hylobius Research Program, led by Prof. Göran Nordlander. This research contributed significantly to the development of new, non-chemical protection methods, and also to adjustments in forest management reducing the risk of insect damage.

Studies of pine weevil feeding behavior led to the finding that sand with a grain size less than 0.2 mm stops weevil feeding as the grains enter in between the mandibles. This led to the innovation of a flexible coating covered with a layer of sand (“Conniflex”) applied to the plant stem in the nursery. Field tests showed that Conniflex effectively reduces damage caused by pine weevils. For the first time a real alternative to insecticide treatment of conifer plants had appeared. The innovation was patented and developed for commercial use by a small company in cooperation with the researchers, and later Conniflex was acquired by the largest producer of forest plants in Sweden.

Pest management of the pine weevil relies not only on direct protection of the plants but also on a number of other damage-reducing measures and considerations, such as site preparation followed by optimal choice of planting spot, timing of planting (year after harvest and time of the season), plant type and plant size, etc. How to optimize these silvicultural countermeasures for different situations has been a main focus for the research within the Swedish Hylobius Research Program, and results have been successfully implemented thanks to effective interactions with stakeholders.
Another important research focus has been methods to estimate damage risk, which varies considerably geographically and depending on forest management methods. Information on damage risk allows the foresters to make well adapted choices of countermeasures.

Details of the impact
Forest regeneration in northern Europe typically involves clear-felling followed by soil preparation and planting of conifer seedlings within three years after harvest. About 350 million seedlings are planted annually in Sweden, of which 150 million are provided some type of protective treatment. The unprotected plants are predominantly used in northern Sweden (approximately N of latitude 60oN). The annual cost for the damage by pine weevil has been estimated to several hundred million SEK. Since the early 1990s, the Swedish Chemicals Agency has repeatedly announced its intention to prohibit the use of insecticides for forest plants, because of the insecticides’ high toxicity to aquatic organisms and due to concerns regarding effects on the health of forestry workers. A ban was, however, never implemented because no satisfactory alternatives were available.

When the Conniflex coating proved to be an effective alternative and large-scale production had started the process of replacing the insecticides came naturally (with help from Swedish FSC, pushing the issue). Other protective coatings also appeared on the market after the breakthrough for Conniflex. The large scale production of Conniflex started in 2010, in 2016 about half of the insecticide use had been replaced, and in 2020 insecticides are judged to be almost completely phased out in Swedish forestry.

The awareness is steadily increasing in Swedish forestry of how to make use also of other measures that reduce damage by the pine weevil. Appropriate site preparation, timing of planting and choice of suitable plants may be combined in various ways together with either protected or unprotected plants, depending on geographic location and other conditions. The implementation of these pest management strategies has probably contributed to the increasing survival in forest regenerations recently documented by the Swedish Forest Agency (Skogsstyrelsen 2017b).

References to the research
Nordlander, G., Nordenhem, H. & Hellqvist, C. 2009. A flexible sand coating (Conniflex) for the protection of conifer seedlings against damage by the pine weevil, Hylobius abietis. Agricultural and Forest Entomology 11:91-100. http://dx.doi.org/10.1111/j.1461-9563.2008.00413.x

Nordlander, G., Hellqvist, C., Johansson, K. & Nordenhem H. 2011. Regeneration of European boreal forests: Effectiveness of measures against seedling mortality caused by the pine weevil Hylobius abietis. Forest Ecology and Management 262: 2354-2363. 10.1016/j.foreco.2011.08.033

Nordlander, G., Hellqvist, C. & Hjelm, K. 2017. Replanting conifer seedlings after pine weevil emigration in spring decreases feeding damage and seedling mortality. Scandinavian Journal of Forest Research 32: 60-67. http://dx.doi.org/10.1080/02827581.2016.1186220

Nordlander, G., Mason, E. G., Hjelm, K., Nordenhem H. & Hellqvist, C. 2017. Influence of climate and forest management on damage risk by the pine weevil Hylobius abietis in northern Sweden. Silva Fennica 51(5): article id 7751 (20 pp.). https://doi.org/10.14214/sf.7751

The pine weevil website with research news and information for successful pest management (in Swedish): “Snytbaggen – biologi och aktuell forskning” http://snytbagge.slu.se/

Sources to corroborate the impact
Giurca, A. & von Stedingk, H. 2014. FSC pesticides policy in Sweden (2014). Forest Stewardship Council, FSC Sweden, 16 pp. http://se.fsc.org/rapporter.289.htm (added 6 October 2014).

SLU News 2017. SLU awards for important and innovative research. https://internt.slu.se/en/news-originals/2017/10/SLU-awards-for-important-and-innovative-research/

Skogsstyrelsen 2017a. Produktion av skogsplantor 2016 (Summary: Production of seedlings 2016). Statistiska Meddelanden JO0313 SM 1701. Stockholm: Statistiska centralbyrån. https://www.skogsstyrelsen.se/globalassets/statistik/statistiska-meddelanden/produktion-av-skogsplantor-jo0313/2016-statistiska-meddelanden-produktion-av-skogsplantor.pdf

Skogsstyrelsen 2017b. Återväxternas kvalitet 2016/2017 (Summary: Quality of regrowth 2016/2017). Statistiska Meddelanden JO0311 SM 1701. Stockholm: Statistiska centralbyrån. https://www.skogsstyrelsen.se/globalassets/statistik/statistiska-meddelanden/atervaxternas-kvalitet-jo0311/2016-statistiska-meddelanden-atervaxtuppfoljning2.pdf