Litsebi tsa lekala la Pyatigorsk la Federal State Budgetary Institution VNIIKR (All-Russian Center for Plant Quarantine) nakong ea lipatlisiso tsa laboratori tse fumanoeng ka lisampole (lisampole) tsa lihlahisoa tse laoloang (litapole tsa peo) lefu le kotsi la ho arola batho - litapole spindle tuber viroid.
Tlhahisoleseding e mabapi le ho tsebahatsa lintho tsa karabelo e ile ea fetisetsoa ho Tsamaiso ea Libaka ea Rosselkhoznadzor bakeng sa Sebaka sa Stavropol le Rephabliki ea Karachay-Cherkess bakeng sa ho nka mehato ea ho arabela molao.
Li-Viroid ha li etse likaroloana tse ikemetseng. Ke karolo ea 359 feela ea li-nucleotide tsa RNA. E teng semeleng se amehileng mme e ikatisa ka mekhoa ea biosynthetic ea semela se amohelang. Kotulo ea li-tubers, ho latela mofuta oa pathogen le mefuta ea litapole, e fokotsehile ka 30-90%.
Boloetse bona bo bonahala ka khatello e akaretsang ea kholo le nts'etsopele ea semela, ho sithabela ha makhasi, ho kobeha ha li-lobes le melamu, ho phutha li-lobes haufi le bohareng, ho fifala ha mapheo a tsona, ho fetoha ha 'mala (botala bo botala kapa bo mosehla, ka linako tse ling 'mala oa anthocyanin. ea lehlakore le ka morao, mathōko le malebela).
Li-tubers li telele, li bōpehile joaloka pere kapa li-dumbbell, li na le palo e eketsehileng ea mahlo, ka linako tse ling e mebala e sa tloaelehang, e nang le matheba a sootho mahlong. Letlobo le fokola, hangata, sebakeng sa letlobo le tloaelehileng, li theha maqhutsu a manyane.
Tšoaetso e tsoela pele ho li-tubers tse kulang le lipeo, li fetisoa ka ho kopana nakong ea ho itšeha le ho lema li-tubers, nakong ea phekolo ea mechine, le mefuta e mengata ea likokoanyana, haholo-holo litšitšili le hoaba.