Dab tsi yog Elm Yellows Phytoplasma: Elm Yellows Kab Mob Hauv Tsev Vaj

2024 Tus sau: Chloe Blomfield | [email protected]. Kawg hloov kho: 2023-12-15 23:55

Elm yellows yog ib yam kab mob uas tawm tsam thiab tua cov neeg elms. Elm yellows kab mob nyob rau hauv cov nroj tsuag tshwm sim los ntawm Candidatus Phyloplasma ulmi, ib tug kab mob tsis muaj phab ntsa uas hu ua phyoplasma. Tus kab mob no systemic thiab tuag. Nyeem rau kom paub txog cov tsos mob ntawm tus kab mob elm daj thiab seb puas muaj kev kho mob elm yellows zoo.

Elm Yellows Disease in Plants

Tus tswv ntawm elm yellows phytoplasma hauv Tebchaws Meskas yog txwv rau cov ntoo elm (Ulmus spp.) thiab cov kab uas thauj cov kab mob. Dawb-banded elm leafhoppers thauj tus kab mob, tab sis lwm yam kab uas pub rau sab hauv elm bark - hu ua phloem - kuj tseem ua lub luag haujlwm zoo sib xws.

Ntawm elms hauv lub tebchaws no tsis tau tsim kev tiv thaiv rau elm yellows phytoplasma. Nws hem cov tsiaj elm nyob rau sab hnub tuaj ib nrab ntawm Tebchaws Meskas, feem ntau tua cov ntoo hauv ob xyoos tom qab pib cov tsos mob tshwm sim. Qee hom elm hauv Europe thiab Asia yog qhov ua siab ntev lossis resistant.

Symptoms of Elm Yellow Disease

Elm yellows phytoplasma tua ntoo systematically. Tag nrho cov yas tsim cov tsos mob, feem ntau pib nrog cov nplooj qub. Koj tuaj yeem pom cov tsos mobntawm elm daj kab mob nyob rau hauv nplooj thaum lub caij ntuj sov, nruab nrab Lub Xya Hli mus txog rau lub Cuaj Hli. Saib cov nplooj uas tig daj, wilt, thiab poob ua ntej lawv yuav tsum.

Cov tsos mob ntawm nplooj ntawm cov kab mob elm daj tsis txawv heev ntawm cov teeb meem tshwm sim los ntawm dej tsawg dhau los lossis cov zaub mov tsis txaus. Txawm li cas los xij, yog tias koj saib cov tawv tawv sab hauv, koj yuav pom elm phloem necrosis txawm tias ua ntej nplooj daj.

Elm phloem necrosis zoo li cas? Cov tawv ntoo sab hauv hloov xim tsaus. Nws feem ntau yuav luag dawb, tab sis nrog elm phloem necrosis, nws hloov mus tob, zib ntab xim. Tsaus flecks kuj tuaj yeem tshwm hauv nws.

Lwm ib qho ntawm cov tsos mob ntawm tus kab mob elm daj yog qhov tsw. Thaum cov tawv nqaij ntub dej raug nthuav tawm (vim elm phloem necrosis), koj yuav pom cov ntxhiab tsw ntawm cov roj wintergreen.

Elm Yellows Treatment

Hmoov tsis zoo, tseem tsis tau tsim kho elm yellows zoo. Yog tias koj muaj tus kab mob elm uas muaj kab mob elm yellows hauv cov nroj tsuag, tshem tawm tsob ntoo tam sim ntawd txhawm rau tiv thaiv cov elm yellows phytoplasma tsis txhob kis mus rau lwm cov elms hauv cheeb tsam.

Yog tias koj tsuas yog cog elms, xaiv cov kab mob tiv thaiv kab mob los ntawm Tebchaws Europe. Tej zaum lawv yuav raug tus kab mob tab sis nws yuav tsis tua lawv.