Matti Nuorteva. (1972). Tumamonisärmiöviruksen käytöstä ruskean mäntypistiäisen (Neodiprion sertifer Geoffr.) torjunnassa. Silva Fennica vol. 6 no. 3 article id 4870. https://doi.org/10.14214/sf.a14676

English title: Use of the nuclear polyhedrosis virus in the control of the European pine sawfly (Neodiprion sertifer Geoff.).

Original keywords: hyönteistuhot; mänty; tummamonisärmiövirus; ruskomäntypistiäinen; biologinen torjunta; virukset

English keywords: biological control; insect damage; polyhedrosis virus; Neodiprion sertifer; European pine sawfly; Borrelinavirus diprionis

Abstract | View details | Full text in PDF | Author Info

Experimental applications of the nuclear polyhedrosis virus (Borrelinavirus diprionis) to control of the European pine sawfly (Neodiprion sertifer Geoff.) was carried out during the last outbreak of this sawfly in in Scots pine (Pinus sylvestris L.) in Finland in 1963. Quantities of polyhedrosis virus preparation, collected and purified in Finland were available as concentrations packed in capsules. Spraying took place in three localities in southwestern Finland when the larvae were in I–III instars.

When Finnish and Swedish preparations were used 83–96% of larval colonies were completely destroyed within 14 days. In addition, an attempt was made to change the virus in latent stage, present already in the area, to acute stage by application of substrates which are probably harmless to pine, but were expected to stress the larvae. Ground quarts as spray had the best lethal effect upon larvae.

The PDF includes a summary in English.

Nuorteva, E-mail: mn@mm.unknown

Category : Research article

article id 42, category Research article

Pablo Martínez-Álvarez, Fernando Manuel Alves-Santos, Julio Javier Diez. (2012). In vitro and in vivo interactions between Trichoderma viride and Fusarium circinatum. Silva Fennica vol. 46 no. 3 article id 42. https://doi.org/10.14214/sf.42

Keywords: pitch canker; antagonism; biocontrol; biological control agents; endophytes; Pinus radiata; Spain

Abstract | View details | Full text in PDF | Author Info

Fusarium circinatum, a fungus that causes pitch canker disease, has been present in Europe since at least 2003, when it was detected in northern Spain and found to be producing severe damage in tree nurseries and pine plantations. In this study, we tested a method of biological control of the disease with Trichoderma viride, a fungal species successfully used against many other pathogens. In vitro and in vivo assays were carried out to test the efficacy of this antagonist in controlling F. circinatum. The T. viride isolate exerted a significant effect on the growth of F. circinatum in the in vitro assay, reducing the length of the pathogen colony by half. However, although we tested three different concentrations of the T. viride spore solution, no clear conclusions were obtained with regard to the effects on the Pinus radiata seedlings. To our knowledge, this is the first study carried out with the aim of using Trichoderma spp. to control pitch canker disease.

Martínez-Álvarez, Sustainable Forest Management Research Institute, University of Valladolid – INIA, Avenida de Madrid 44, 34071 Palencia, Spain E-mail: pmtnez@pvs.uva.es
Alves-Santos, Sustainable Forest Management Research Institute, University of Valladolid – INIA, Avenida de Madrid 44, 34071 Palencia, Spain E-mail: fmas@nn.es
Diez, Sustainable Forest Management Research Institute, University of Valladolid – INIA, Avenida de Madrid 44, 34071 Palencia, Spain E-mail: jjd@nn.es

article id 179, category Research article

Henna Vartiamäki, Jarkko Hantula, Antti Uotila. (2009). Susceptibility of silver birch pruning wounds to infection by white-rot fungus (Chondrostereum purpureum), a potential bioherbicide. Silva Fennica vol. 43 no. 4 article id 179. https://doi.org/10.14214/sf.179

Keywords: birch; vegetation management; biological control; fungal decay; pruning

Abstract | View details | Full text in PDF | Author Info

We artificially inoculated pruning wounds of silver birch (Betula pendula Roth) to study seasonal variation in their vulnerability to infection by the fungal decomposer Chondrostereum purpureum (Pers. ex Fr.) Pouzar. This information is critical to the assessment of incidental infection risks in areas where C. purpureum may be used as a bioherbicide. On seven monthly occasions between April and October 2005, 30 birch trees were pruned to yield a total of 210 experimental trees. On each occasion, 10 trees were inoculated immediately with C. purpureum mycelium, 10 were inoculated with blank inoculum and 10 were only pruned. In the summer of 2007, a survey of 129 experimental trees showed that pruning wounds were most susceptible to infection during May. Treatment with C. purpureum at other times during the growing season also increased the extent of discoloration or decay but the effect was considerably less.

Vartiamäki, Finnish Forest Research Institute, Vantaa Research Unit, P.O. Box 18, FI-01301 Vantaa, Finland E-mail: henna.vartiamaki@metla.fi
Hantula, Finnish Forest Research Institute, Vantaa Research Unit, P.O. Box 18, FI-01301 Vantaa, Finland E-mail: jh@nn.fi
Uotila, University of Helsinki, Hyytiälä Forestry Field Station, Hyytiäläntie 124, FI-35500 Korkeakoski, Finland E-mail: au@nn.fi

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