Cov ceg ntawm Lavxias teb sab Agricultural Center nyob rau hauv lub Komi koom pheej ceeb toom ntawm kev txaus ntshai ntawm kev sib kis ntawm annular kab mob rot ntawm qos yaj ywm. Qhov no yog ib qho kab mob txaus ntshai uas tuaj yeem rhuav tshem txog li 45% ntawm cov qoob loo, yog li nws tseem ceeb heev uas yuav tsum tau ua raws sijhawm thaum thawj cov cim tshwm sim.
Tus neeg sawv cev ntawm tus kab mob no yog cov kab mob phem ntawm hom Corynebacterium sepedonicum (Clavibacter michiganensis subsp. Sepedonicum).
Tus kab mob no cuam tshuam rau nplooj, stems, stolons thiab tubers. Withering ntawm cov nroj tsuag pib manifest nws tus kheej thaum lub sij hawm flowering lub sij hawm thiab tseem mus txog rau thaum xaus ntawm lub caij loj hlob. Ntawm cov qos yaj ywm, tsis yog txhua tus tuaj yeem wither, tab sis tsuas yog 1-2 stems. Ntawm qhov txiav ntawm qia, yellowing lossis darkening ntawm cov hlab ntsha yog pom.
Nyob rau hauv cov huab cua qhuav, cov nroj tsuag muaj kab mob wither sai sai, tubers yog externally tsawg kis, vim hais tias ntawm lub latent xwm ntawm tus kab mob, thiab nyob rau hauv ntub xyoo nrog nruab nrab kub, cov nroj tsuag withers maj mam, thaum lub sij hawm kev puas tsuaj rau tubers nce.
Ntawm tubers, tus kab mob manifests nws tus kheej nyob rau hauv daim ntawv ntawm lub nplhaib thiab lub qhov rot. Nrog lub nplhaib rot, necrosis ntawm cov hlab ntsha ntawm lub nplhaib yog pom, thaum nyem, daj mucous exudate tshwm. Nrog pitted rot, creamy oily me ntsis yog tsim nyob rau hauv daim tawv nqaij ntawm tuber, uas nce nyob rau hauv loj thaum lub sij hawm cia.
Cov kab mob tubers yog lub hauv paus ntawm kev kis kab mob.
Cov kab mob tsis hibernate hauv av, tab sis nws tuaj yeem nyob rau ntawm cov khib nyiab.
Tus kab mob kis tau thaum lub sij hawm sau qoob: cov kab mob kis tau yooj yim los ntawm riam thaum txiav tubers, nrog rau kev puas tsuaj los ntawm kev ua liaj ua teb.
Txoj kev raug tshaj plaws rau kev kuaj xyuas lub nplhaib rot yog ib qho kev ntsuam xyuas polymer saw cov tshuaj tiv thaiv (PCR).
Kev tswj hwm yooj yim
Tsis muaj tshuaj muaj tshuaj los tiv thaiv lub nplhaib rot.
Agrotechnical ntsuas:
• Cov khoom cog zoo
• Ua raws li kev cog qoob loo.
• Cultivation ntawm resistant ntau yam.
• Tshem tawm cov nroj tsuag kab mob thaum lub caij cog qoob loo
• Ua kom sov cov noob rau 2-3 lub lis piam ntawm qhov kub ntawm 14-18 degrees ua ntej cia lossis thaum kawg ntawm lub sijhawm khaws cia txhawm rau txhawm rau txheeb xyuas cov kab mob.
• Kev txiav nyom thiab tshem tawm raws sij hawm.
• Ua tib zoo npaj thiab tshuaj tua kab mob ntawm cov qos yaj ywm cia ua ntej tso tubers.