GLIVNI PATOGENI, POVEZANI Z ODMIRANJEM KROŠNJE IN GNILOBO KORENINSKEGA VRATU JABLANE V JUŽNI SIRIJI

Walid Ghazi Naffaa, Abeer Rashid

Povzetek


Odmiranje krošnje in gniloba koreninskega vratu jablane je uničujoča in široko razširjena bolezen na večini njenih pridelovalnih območij. Na območju južne Sirije so bile opravljene raziskave za opis bolezenskih znakov, pogostosti pojavljanja bolezni in prepoznavanja njenih povzročiteljev. Na večini raziskanih mest se je bolezen pojavljala z 0,08 do 10 %, samo na lokaciji Alroom pa do 14,7 % v letu 2014 in do 17,8 % v letu 2015, povprečno 11,8 %. Bolezenski znaki so bili majhni bledo zeleni listi, redka olistanost in rdeče-rjavo obarvano ličje okuženih delov na bazi debel dreves. Izolati gliv so pripadali naslednjim rodovom gliv: Phytophthora, Rosellinia, Rhizoctonia, Phialophora, Acremonium, Pestalotiopsis, Cylindrocarpon in Verticillium. Glive iz rodu Phytophthora so bile najpogostejši pathogen in izolirane iz vseh okuženih dreves, 53,7 % vseh izolatov. Izolati vrst iz rodu Phytophthora, ki so se razvili iz rakov v krošnji jablan, so bili določeni kot vrsti P. cactorum (91,5 %) in P. cambivora (8,5 %). Izsledki te raziskave so prvi o pojavljanju bolezni odmiranja krošenj in gnilobe koreninskega vratu jablane v Siriji.

Ključne besede


odmiranje krošnje; gniloba koreninskega vratu; jablana; z boleznijo povezane glive; Phytophthora; Syria

Celotno besedilo:

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DOI: http://dx.doi.org/10.14720/aas.2017.109.1.10

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