Cov kab mob tuaj yeem loj hlob sai heev tom qab kis kab mob thiab pom cov tsos mob tuaj yeem tshwm sim hauv ib hnub. Yog tias cov kab mob nkag mus rau hauv lub khw, tus kab mob tuaj yeem tsim muaj, ua rau poob loj. Muaj ntau yam genotypes ntawm P. infestans tam sim no thoob ntiaj teb, uas tuaj yeem sib txawv ntawm cov kab mob uas lawv ua rau (lawv aggressiveness) thiab lawv cov fungicide rhiab heev. Cov kev hloov pauv ntawm cov yam ntxwv no muaj peev xwm ua rau tus kab mob ua rau muaj kev puas tsuaj ntau dua thiab nyuaj rau kev tswj hwm.
Txoj kev tseem ceeb ntawm dispersal ntawm P. infestans yog los ntawm huab cua-borne sporangia los ntawm cov qoob loo uas muaj kab mob, volunteer qos yaj ywm los yog cov nroj tsuag nyob rau hauv cov txheej txheem outgrade, txawm tias cov noob kab mob kuj tuaj yeem ua rau muaj kev sib kis.
Asexual reproduction yog ceev thiab yog hom feem ntau. Sporangia tuaj yeem kis tau cov nroj tsuag tshiab ncaj qha lossis lawv tuaj yeem tso cov zoospores uas tawg mus rau hauv cov yeeb yaj kiab dej ua ntej encysting thiab kis rau cov nroj tsuag.
Kev sib deev tsis tshua muaj tshwm sim. Nws tshwm sim qhov twg ob hom mating (A1 thiab A2) ntawm P. infestans muaj nyob rau hauv cov ntaub so ntswg. Thick-walled oospores yog tsim uas tuaj yeem nyob hauv av.
Cov tsos mob lig blight ntawm nplooj feem ntau tshwm sim raws li qhov tsis xwm yeem zoo li qhov tsaus nti uas loj thaum tus kab mob loj tuaj. Nyob rau saum npoo av ib lub teeb ntsuab halo feem ntau nyob ib puag ncig thaj tsam necrotic thiab, nyob rau hauv qis dua, cov kab mob dawb-cov kab mob pwm tsim nyob ib ncig ntawm cov kab mob hauv cov dej noo.
Cov tsos mob ntawm tuber yog xim av tsaus, qee zaum purplish, thaj tsam ntawm tuber nto. Sab hauv rot yog xim av xim av granular rot uas tuaj yeem nyob ze rau ntawm qhov chaw lossis nce mus rau qhov chaw ntawm lub tuber. Kev loj hlob rot yog tsis xwm yeem thiab qee zaum threadlike los ntawm tuber nqaij. Late blight ua rau cov tawv nqaij puas tsuaj uas tso cai rau cov kab mob ua rau muaj kev cuam tshuam thiab ua rau muag muag.
Ib txoj hauv kev IPM yog yuav tsum tau los daws cov teeb meem lig, suav nrog:
- Kev siv ntau dua blight cultivars
- Kev tswj hwm ntawm thawj qhov chaw inoculum (volunteer qos yaj ywm, outgrade pawg, kab mob qoob loo, noob)
- Kev siv cov cuab yeej tiv thaiv kab mob kom nkag siab txog kev pheej hmoo ntawm blight thiab phiaj xwm kev siv tshuaj tua kab mob kom haum
- Kev tswj ntawm tuber blight kom tsis txhob poob cia thiab thawj, noob-yug inoculum rau lub caij tom ntej
Yees duab: Maria A. Kuznetsova (All-Lavxias teb sab Phytopathology Research Institute, https://gd.eppo.int/taxon/PHYTIN)
