Mikrovetikate tootlikkuse ja rakendusvaldkondade analüüs
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Kuupäev
2016
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Antud töö eesmärgiks oli uurida juurepessu (Heterobasidion spp.) nakkusega hariliku kuuse
puhtpuistus (harvendusraie järgselt) profülaktika tulemuslikkust, kui kändude töötlemine
tõrjevahenditega (biopreparaat Rotstop ja karbamiid) toimub ajalise nihkega (3 kuud peale raiet).
Uurimuse jaoks koguti 2015.a. Järvselja ÕKMK (kvartalist 299 eraldiselt 17) analüüsimiseks
kokku 198 saepuruproovi ja 98 prooviketast. Teostati saepuruproovidele molekulaarne (DNA)
analüüs hindamaks juurepessu liigilist koosseisu puistus enne ja pärast töötlemist.
Analüüsitulemused näitavad, et karbamiidiga töödeldud aladel 3 ja 6 vähenes juurepessu nakkuse
hulk kordusproovides 25,6% – 17,9 % - ni (kändude koguarvust). Kontrollalal 2 ei leitud
esmastest proovidest ühtegi nakkusega saepuru, kordusproovide analüüs näitas, et vahepeal on
nakatunud 10% kändudest. Rotstopiga pritsitud proovialadelt 1, 5 kogutud saepuruproovides
esines juurepessu nakkus enne töötlemist 17,9% kändudest, pärast töötlemist kasvas nakatunud
kändude arv 25,6%-ni.
The purpose of this study was to investigate effectiveness of the prevention of the root and butt rot (Heterobasidion spp.) infection in the spruce thinning. Control treatment for stumps was done three months lag with biological preparation Rotstop and chemical urea. The study was carried out 2015 Järvselja ÕKMK (299-17), 198 samples of sawdust and 98 stump samples were collected. On the test area was organised the following sampling procedures: stump rot was detected visually; stump diameters were measured; sawdust samples were taken prior to treatment; stumps were treated by Rotstop and urea suspension; sawdust samples were taken 5 months after treatment; analys disks were taken from stumps. The analysis results showed that in terms of urea-treated areas 3 and 6, the number of infected samples collected during the second sampling decreased from 25,6% to 17,9% (out of total number of stumps). Control area 2 did not indicate a single infected sample, whereas the second sampling showed 10% of infected stumps. Areas 1 and 5 sprayed by Rotstop first indicated 17,9% of infected stumps, after the treatment, the number of infected stumps increased to 25,6%
The purpose of this study was to investigate effectiveness of the prevention of the root and butt rot (Heterobasidion spp.) infection in the spruce thinning. Control treatment for stumps was done three months lag with biological preparation Rotstop and chemical urea. The study was carried out 2015 Järvselja ÕKMK (299-17), 198 samples of sawdust and 98 stump samples were collected. On the test area was organised the following sampling procedures: stump rot was detected visually; stump diameters were measured; sawdust samples were taken prior to treatment; stumps were treated by Rotstop and urea suspension; sawdust samples were taken 5 months after treatment; analys disks were taken from stumps. The analysis results showed that in terms of urea-treated areas 3 and 6, the number of infected samples collected during the second sampling decreased from 25,6% to 17,9% (out of total number of stumps). Control area 2 did not indicate a single infected sample, whereas the second sampling showed 10% of infected stumps. Areas 1 and 5 sprayed by Rotstop first indicated 17,9% of infected stumps, after the treatment, the number of infected stumps increased to 25,6%
Kirjeldus
Märksõnad
juurepess, bakalaureusetööd, kuusk, taimekaitsevahendid