Search Results

You are looking at 1 - 3 of 3 items for

  • Author: Adam Okorski x
Clear All Modify Search
Open access

Adam Okorski, Tomasz Oszako, Justyna A. Nowakowska and Agnieszka Pszczółkowska

Abstract

Achieving high quality propagative material is difficult today due to the limited number of pesticides recommended for use. Simultaneously, EU regulations on Integrated Pest Management (IPM) in forest nurseries came into a force, requiring a search for alternative plant protection methods that are safe for humans, animals and the environment. In this paper, we present the possibilities of using bio-fungicides against diseases in forest nurseries, their mechanisms of action, as well as the direction of their development (according to IPM rules). We reviewed the results achieved by different research teams presenting the possibilities and trends in combatting Oomycetes and Fusarium spp. pathogens currently having the most important economic impact.

Open access

Adam Okorski, Agnieszka Pszczółkowska, Tomasz Oszako and Justyna A. Nowakowska

Abstract

The possibility of using chemicals in European forestry is extremely limited due to the binding legal regulations and specific conditions concerning the market of plant protection products. This is reflected in the limited availability of active fungicides in forestry. Due to this limitation, practitioners using fungicides in forest nurseries and forest cultivation must have substantial knowledge of the biology of pathogens to ensure satisfactorily effective protection.

The work presented here provides an overview of the currently recommended fungicides in Polish forestry as well as the mechanisms of interaction between the active substances and the pathogen, the plant and mycorrhizal fungi. The risk of fungicide resistance, which has been insufficiently explored in the context of forest pathogens, is also discussed in this paper.

Open access

Alicja Gorzkowska, Agnieszka Pszczółkowska, Adam Okorski, Justyna A. Nowakowska and Tomasz Oszako

Abstract

Fungi colonising oak seedlings in forest plantations in north-eastern Poland were identified in 2014-2015. The evaluated 4- to 6-year bare root oaks originated from the Olsztynek Forest District (Regional Directorate of the State Forests in Olsztyn). In total, 744 fungal isolates belonging to 11 different species, and 11 genera, were identified in tested plants. Amongst them, 186 cultures (25%) were classified as plant pathogens. The most commonly isolated pathogenic fungi belonged to the Fusarium and Cylindrocarpon genera.