Raszyn, Poland
Raszyn, Poland

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Three products (RotstopF, RotstopS and PGSuspension) based on lyophylised spores of registered isolates of Phlebiopsis gigantea and non-tegistered Polish PgIBL as a control were tested in Scots pine stumps located in 3 forest regions (north-west, north, east) of Poland in autumn 2007, spring 2008 and autumn 2008. One year later the presence of: a) subcortical mycelium and b) the fruit bodies of P. gigantea, and c) symptoms of sapwood decay were counted and compared as Biological Treatment Efficacy (BTE) index. Obtained BTE values inform that generally PgSuspension preparation was the most effective if applied in spring 2008, whereas both Rotstop preparates showed similar and compared effectiveness in all terms of application. The differences in preparation efficacy between forest regions were found.

An assessment of ectomycorrhizal fungi associated with Pinus sylvestris L. growing on abandoned post-agricultural soil was performed. The seedlings were growing at three different treatments of soil amendments (harvest residue, bark compost and sawdust). As a control treatment, the soil without any amendments was used. The comparison of ectomycorrhizal structure done ten years after the application of organic substrates showed no significant changes in species richness level. The most frequent taxa, irrespective of the treatment, was Wilcoxina sp. The result seems to be connected with high nitrogen level in the soil. Ectomycorrhizae of Cortinarius sp. and Pimrhiza spp. dominated in all treatments. The results showed that species richness and abundance of live and dead mycorrhizae depend on soil conditions, which are similar on treatment and control plots. © 2014, Polish Forest Society. All rights reserved.

Tkaczyk M.,Zaklad Ochrony Lasu | Nowakowska J.A.,Zaklad Hodowli Lasu i Genetyki Drzew Lesnych | Oszako T.,Zaklad Ochrony Lasu
Sylwan | Year: 2014

In the situation of limited number of pesticides being approved for use in forest nurseries it is necessary to examine new products available on European market that stimulate growth and improve resilience and vitality of seedlings as a part of intgrated plant protection program. Paper presents test of fertilizer Actifos used in seven Polish nurseries in order to stimulate the growth of seedlings. In 64% of cases, Actifos stimulated increament of shoots (significantly for oaks, beeches, pines, spruces and alders) as well as for roots (significantly only for alders and oaks).

The study aimed at the estimation of efficacy of the insecticide Mospilan 20 SP (active substance: acetamipryd 20%) used at different doses to reduce the number of great pine web-spinning pine sawfly Acantholyda posticalis Mats. in aerial (doses: 0.2, 0.3 and 0.4 kg/ha) and ground treatments (dose: 0.4 kg/ha). The mortality of A. posticalis larvae reached 57.5-71.6% in aerial treatments. However the insecticide used at the dose of 0.4 kg/ha in aerial and ground treatments caused 95-99% mortality of the pest. © 2014, Polish Forest Society. All rights reserved.

The study evaluates the antifeedant activity of rutin and quercetin (flavonoids of buckwheat Fagopyrum esculentum) and the extract from the leaves of black alder Alnus glutinosa on the development and the extent of damage caused by the beetles of cockchafer Melolontha melolontha in laboratory and semi-field conditions. We found increased mortality and decreased intensity of beetle feeding on the Quercus robur leaves sprayed with a solution of rutin. The treatment of Q. robur leaves with solutions of quercetin and extract from the leaves of black alder had no effect on the development of beetles and fertility of females, and did not inhibit feeding of cockchafer. © 2014, Polish Forest Society. All rights reserved.

Tumialis D.,Katedra Biologil Srodowiska Zwierzat | Skrzecz I.,Zaklad Ochrony Lasu | Mazurkiewicz A.,Katedra Biologil Srodowiska Zwierzat | Pezowicz E.,Katedra Biologil Srodowiska Zwierzat | Goral K.,Katedra Genetyki i Ogolnej Hodowli Zwierzat
Sylwan | Year: 2013

The use of entomopathogenic nematodes (Steinernema and Heterorhabditis spp.), against the large pine weevil Hylobius abietis (L.) is currently studied in many countries. They show a great potential of nematodes for H. abietis control in laboratory and field experiments. In 2011 similar studies began in Poland to develop new biological control method of H. abietis with the use of native isolates of the nematodes. The first laboratory stage of the experiments pointed at the estimation of biological activity of 3 native isolates: 2 of Steinernema feltiae (Filipjev) and 1 of S. kraussei (Steiner). The tested nematodes were applied at the dose of 100 invasive larvae per 1 larva of H. abietis. After 48 hours H. abietis larvae were sectioned and examined for a determination of their mortality, extensivity and intensity of infection. No statistical differences were found between larvae mortality and extensivity of infection by tested isolates of nematodes. In all variants the mortality and extensivity of infection were high and reached 92-100% and 80-86% respectively. Statistical differences were found between the intensity of infection, which were the highest in case of S. feltiae Zag 15. The obtained results indicated different activity of nematode isolates within one speies.

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