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Sidorov, Evgeny, 2005. Efficacy of different concentrations of Rotstop® and RotstopS and imperfect cover of RotstopS against Heterobasidion spp. infections on Norway spruce stumps. SLU, Southern Swedish Forest Research Centre, Alnarp. Alnarp: SLU, Southern Swedish Forest Research Centre



The effectiveness of treatment with two Phlebiopsis gigantea based preparations (Rotstop®
and RotstopS) in different concentrations against the root and butt rot causing fungus
Heterobasidion annosum s.l. on Norway spruce (Picea abies) thinning stumps in southern
Sweden was compared. The trees were cut on three sites during the summer 2004 and 285
stumps were treated manually with 100% cover with two different amounts of spores in
solution corresponding to approximately 5×106 spores/l and 10×106 spores/l. 31 stumps
received mechanical part cover with the highest spore concentrations of Phlebiopsis gigantea, i.e. approximately 20×106 spores/l. Mechanical treatment was assessed for satisfactory treatment effect. Three months later, samples were collected and analyzed.

There was a significant reduction in frequency and relative areas of Heterobasidion spp.
infections on stumps with manual application of control agents compared to untreated stumps. On average 10 to 23% of stumps subjected to manual treatments were infected compared to 52% for the untreated stumps. However, none of the concentration solutions of Rotstop® and RotstopS differed from the others in reduction of Heterobasidion spp. infections. Mechanical treatment failed to control the Heterobasidion spp. infections, but there was a tendency for the 85.1-95.0% cover class to provide better result than the others. Thus, despite of the incomplete control of the pathogen, stump treatment with different concentrations of Phlebiopsis gigantea oidia in suspensions provided equal effects at the present spore loads of Heterobasidion spp.


Effektiviteten av behandling med två pergamentsvampsbaserade (Phlebiopsis gigantea)
lösningar (Rotstop® och RotstopS) i olika koncentrationer mot sporinfektioner av rotticka
(Heterobasidion spp.) på gallringsstubbar av gran (Picea abies) i södra Sverige jämfördes.
Träd avverkades på tre olika lokaler under sommaren 2004 och sammanlagt 285 stubbar
behandlades manuellt med en hundraprocentig täckning i två olika koncentrationer
motsvarande ungefär 5×106 sporer/l respektive 10×106 sporer/l lösning. 31 stubbar på en av
lokalerna behandlades maskinellt med en ofullständig täckning men med den högsta
koncentrationen av pergamentsvamp (RotstopS), ca 20×106 sporer/l lösning. Effekten av den
mekaniska behandlingens partiella täckning jämfördes med den manuella fullständiga. Tre
månader efter behandlingen samlades prover in för analys med avseende på förekomsten av
Alla manuella behandlingar gav en signifikant reducering av frekvensen av och relativa arean
av rottickeinfektioner jämfört med obehandlade stubbar. I genomsnitt var 10 till 23 % av de
manuellt behandlade stubbarna infekterade jämfört med 52 % av de obehandlade. Ingen av de
manuella applikationerna skiljde sig dock från varandra. Den mekaniska behandlingen gav
inte ett tillfredsställande resultat men det fanns en tendens till att täckningsgradsklass 85,1-
95,0 % fungerade bättre än de andra. Således, trots att ingen behandling gav en 100 % -ig
minskning av antalet rottickeinfektioner, verkar olika koncentrationer av Rotstop® och
RotstopS ge ett likvärdigt resultat under de förhållanden i sportryck som rådde vid

Main title:Efficacy of different concentrations of Rotstop® and RotstopS and imperfect cover of RotstopS against Heterobasidion spp. infections on Norway spruce stumps
Authors:Sidorov, Evgeny
Supervisor:Rönnberg, Jonas
Series:Examensarbete / SLU, Institutionen för sydsvensk skogsvetenskap
Volume/Sequential designation:66
Year of Publication:2005
Level and depth descriptor:Other
Student's programme affiliation:Other
Supervising department:(S) > Southern Swedish Forest Research Centre
Keywords:Rotstop, spruce
Permanent URL:
Subject. Use of subject categories until 2023-04-30.:?? 5045 ??
Forestry - General aspects
Deposited On:02 Oct 2017 08:51
Metadata Last Modified:02 Oct 2017 08:51

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