Impact of pine (Pinus sylvestris L.) and spruce (Picea abies (L.) Karst.) bark extracts on important strawberry pathogens | Priedes (Pinus sylvestris L.) un egles Picea abies (L.) Karst.) mizas ekstraktu ietekme uz nozīmīgiem zemeņu patogēniem
2015
Minova, S., University of Latvia, Salaspils (Latvia). Inst. of Biology | Seskena, R., University of Latvia, Salaspils (Latvia). Inst. of Biology | Voitkane, S., University of Latvia, Salaspils (Latvia). Inst. of Biology | Metla, Z., University of Latvia, Salaspils (Latvia). Inst. of Biology | Daugavietis, M., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Jankevica, l., University of Latvia, Salaspils (Latvia). Inst. of Biology
English. Phytopathogenic fungi induced considerable economic losses in strawberry production industry; therefore, more attention should be paid to development and implementation of preventative treatment that is environmentally friendly. Coniferous trees produce a wide variety of compounds, such as terpenoids and phenolics. Several studies are known on fungicidal activity of different components of coniferous tree bark. The aim of this study was to evaluate in vitro pine (Pinus sylvestris L.) and spruce (Picea abies (L.) Karst.) bark ethanol extracts impact on pathogenous fungi causing diseases of strawberries. Products of processed pine (Pinus sylvestris) and spruce (Picea abies) bark were tested. During 2011 to 2013, several in vitro experiments were carried out to test the effectiveness of pine and spruce bark extracts against various phytopathogenic fungi isolated from strawberries: Botrytis cinerea, Colletotrichum acutatum, Phytophthora cactorum and Mycosphaerella fragariae. Radial growth tests showed that coniferous bark extracts inhibit mycelial growth of B. cinerea, C. acutatum, P. cactorum and M. fragariae. Extracts had the highest antifungal effect on B. cinerea two and five days after inoculation (p is less than 0.05). Bark extracts can reduce the sporulation of B. cinerea, C. acutatum and P. cactorum.
Show more [+] Less [-]Latvian. Zemeņu ražu būtiski samazina kaitēkļi un patogēno sēņu izraisītas slimības, tādēļ aizvien vairāk pētījumu tiek veltīti videi draudzīgu augu aizsardzības produktu izveidei. Skuju koki producē dažādus aktīvus savienojumus, piemēram, terpenoīdus un fenolus. Pētījuma mērķis bija novērtēt parastās priedes (Pinus sylvestris L.) un parastās egles (Picea abies (L.) Karst.) ekstraktu antifungālo iedarbību uz zemeņu slimības izraisošām sēnēm in vitro. Laikā no 2011. līdz 2013. gadam veiktas vairākas eksperimentu sērijas, lai pārbaudītu ekstraktu efektivitāti pret zemeņu slimības izraisošām fitopatogēnām sēnēm — Botrytis cinerea, Colletotrichum acutatum, Phytophthora cactorum un Mycosphaerella fragariae. Novērtējām ekstraktu ietekmi uz micēlija augšanu un sporulēšanas intensitāti. Sēņu radiālās augšanas tests parādīja, ka priežu un egļu mizas etanola ekstrakti inhibē B. cinerea, C. acutatum, P. cactorum micēlija augšanu. Pievienojot barotnei ekstraktu devu 20 g L−1 , B. cinerea, C. acutatum un P. cactorum novēro 100% micēlija augšanas inhibēšanu, kas būtiski netšķiras no fungicīda Signum® efektivitātes (p ir mazāks 0,05). Mūsu rezultāti liecina, ka sēne M. fragariae ir vairāk izturīga pret ekstraktu ietekmi.
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