Heterobasidion root rot in small diameter conifer stumps. Summary of academic dissertation for acquiring the doctor's degree of forest sciences | Heterobasidion izraisītā sakņu trupe maza diametra skujkoku celmos. Promocijas darba kopsavilkums Dr.silv. zinātniskā grāda iegūšanai
2018
Brauners, I., Latvian State Forest Research Inst. Silava, Salaspils (Latvia)
English. The objective of the promotion paper is to determine the role played by small stumps of spruce (Picea abies) and pine (Pinus sylvestris) in the distribution of Heterobasidion (Heterobasidion spp.) after commercial thinning; to evaluate the impact of natural Phlebiopsis gigantea infection on the development of Heterobasidion spp.. The following research tasks were set to meet the objective: 1) to evaluate the susceptibility of small-dimension spruce and pine stumps (diameter 2–14 cm) against Heterobasidion spp. basidiospore infection; 2) to determine the density of Phlebiopsis gigantea in small-dimension conifer tree stumps and the role P. gigantea plays in restricting Heterobasidion spp.; 3) to determine the pre-commercial thinning seasonal effect on Heterobasidion spp. infection in small-dimension stumps; 4) to determine the development dynamics of Heterobasidion spp. in small-dimension spruce and pine stumps. The following thesis was outlined in line with the promotion paper: Heterobasidion can infect small-dimension conifer tree stumps after pre-commercial thinning; natural infection caused by Phlebiopsis decreases the risk of small-dimension stumps infection with Heterobasidion spp.
Show more [+] Less [-]Latvian. Promocijas darba mērķis ir noskaidrot parastās egles Picea abies (L.) H.Karst. un parastās priedes Pinus sylvestris L. mazo dimensiju celmu nozīmi sakņu piepes Heterobasidion spp. izplatībā pēc veiktas sastāva kopšanas cirtes, kā arī izvērtēt lielās pergamentsēnes Phlebiopsis gigantea dabiskās infekcijas ietekmi uz Heterobasidion spp. attīstību. Mērķa sasniegšanai noteikti šādi darba pētnieciskie uzdevumi: izvērtēt parastās egles Picea abies (L.) H.Karst. un parastās priedes Pinus sylvestris L. mazo dimensiju celmu (diametrs 2–14 cm) uzņēmību pret Heterobasidion spp. bazīdijsporu infekciju, analizēt Phlebiopsis gigantea sastopamību mazo dimensiju skujkoku celmos un P. gigantea nozīmi Heterobasidion spp. ierobežošanā, analizēt kopšanas cirtes sezonas ietekmi uz mazo dimensiju celmu inficēšanos ar Heterobasidion spp., noskaidrot Heterobasidion spp. micēlija attīstības dinamiku mazo dimensiju parastās egles Picea abies (L.) H.Karst. un parastās priedes Pinus sylvestris L. celmos.
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