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  • Author: Elżbieta Pezowicz x
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Iwona Skrzecz, Elżbieta Popowska-Nowak, Robert Wolski, Alicja Sowińska, Tomasz Jabłoński, Elżbieta Pezowicz, Dorota Tumialis and Iwona Przewłoka

Abstract

Small banded pine weevil Pissodes castaneus is one of the most dangerous pests of Pinus sylvestris plantations and thickets. The lack of effective and environmentally safe methods of limiting the number of the pest justified to undertake the studies aimed at the laboratory and field evaluation of biological activity of entomopathogenic fungus Beauveria bassiana used to reduce the numbers of small banded pine weevil.

In laboratory, the beetles were reared on the sections of fresh Scots pine twigs that were treated with five suspensions containing from 1 × 104 to 1 × 108 conidia of B. bassiana in 1 ml. During the 3-week rearing, insect mortality was determined and median lethal concentration LC50 was calculated. The field treatments consisted of spraying 4-year-old P. sylvestris trees with two formulations of fungus containing 1 × 108 conidia ml−1 of suspension. Treatments consisted of spraying 4-year-old P. sylvestris trees with two fungus formulations containing 1 × 108 conidia ml−1.

High insecticidal activity of B. bassiana was found because the pathogen caused the death of 14-94% of P. castaneus beetles, LC50 = 6.51 × 105 conidia ml−1. Field treatments did not result in the reduction of plant damage caused by small banded pine weevil; therefore, the spraying of trees with B. bassiana cannot be recommended to protect the young stands of P. sylvestris against pest.

Open access

D. Tumialis, R. Gromadka, I. Skrzecz, E. Pezowicz, A. Mazurkiewicz and E. Popowska - Nowak

Abstract

This study reports the first record of Steinernema kraussei from Poland. The nematode was isolated from coniferous woodlands in 4 localities in central Poland. Preliminary identification of the species was done based on morphometric measurements. To confirm nematode species of the genus Steinernema the result was supported by the description of the ITS region.