2024 Tus sau: Chloe Blomfield | [email protected]. Kawg hloov kho: 2023-12-15 23:55
Ib hnub koj cov paj zoo nkauj, tag kis koj pom koj dahlias nrog cov kab mob pwm thoob plaws lawv nplooj. Qhov no greyish dawb, talc-zoo li kev loj hlob yog tshwm sim los ntawm ib tug fungus thiab yog ib qho teeb meem tshwm sim. Nws feem ntau tsis tua cov nroj tsuag, tab sis cov nplooj tuaj yeem hloov pauv, hloov xim, withered, thiab poob tawm.
YDahlia Paj Powdery Mildew yog dab tsi?
Ntau hom kab mob tuaj yeem ua rau cov kab mob mildew hauv cov nroj tsuag ornamental. Golovinomyces cichoracearum (yav tas los Erysiphe cichoracearum) tau raug txheeb xyuas tias yog hom kab mob fungus uas feem ntau kis rau lub paj dahlia. Powdery mildew feem ntau tsis kis mus rau paj hauv lwm tsev neeg cog, vim ntau hom fungi yog tswv tshwj xeeb.
Powdery mildew ntawm dahlias feem ntau precipitated los ntawm high humidity (tshaj 95%), nruab nrab ambient kub nyob rau hauv lub 68 mus rau 86 degrees F. (20-30 C.), thiab tsis tshua muaj teeb meem. Cov kab mob tshwm sim tshwm sim nyob rau lub caij nplooj ntoos hlav thiab lub caij nplooj zeeg vim muaj qhov sib txawv ntawm qhov kub thiab txias thaum lub sijhawm 24 teev. Cov kab mob kis no kuj yog ib qho teeb meem tshwm sim hauv tsev cog khoom uas nws kis tau cov nroj tsuag noj qab haus huv los ntawm kev colonizing ntawm nplooj.
Controlling Dahlia Powdery Mildew
Thaum nws los txog rau cov kab mob mildew ntawm dahlias, tiv thaiv kev sib kis ntawm fungi spores yog qhov tseem ceeb. Powdery mildew spores yog thauj los ntawm huab cua txav los yog dej txaws. Thaum cov spores tsaws ntawm cov neeg nyob sib ze dahlia nplooj, lawv germinate. Cov fungus tau txais cov as-ham los ntawm kev nkag mus rau cov nroj tsuag epidermis nrog haustori, uas yog tshwj xeeb pub cov qauv.
Tshem tawm thiab pov tseg cov nplooj ntoo kom zoo yog txoj hauv kev zoo tshaj plaws los tswj cov kab mob dahlia powdery mildew. Hauv kev teeb tsa tsev cog khoom, cov nroj tsuag thiab cov neeg tuaj yeem pab dawb tuaj yeem ua tus tswv tsev rau cov fungus. Cov fungus tseem tuaj yeem overwinter ntawm cov khib nyiab. Kev tu lub caij nplooj zeeg ib xyoos yog pom zoo rau sab nraum paj txaj.
Cov kev tswj hwm zoo tshaj plaws kuj suav nrog:
- Txhim kho huab cua ncig ntawm cov nroj tsuag. Tsis txhob overcrowding ntawm seedlings nyob rau hauv lub tsev xog paj. Cia qhov chaw txaus nyob ib puag ncig dahlias thaum cog sab nraum zoov.
- Dej thaum sawv ntxov kom lub hnub tshav kub tuaj yeem qhuav cov nroj tsuag nplooj. Zoo dua, dej hauv av ntawm lub hauv paus ntawm cov nroj tsuag es tsis txau cov nplooj. Txwv kev xyaum ntawm cov nroj tsuag misting hauv tsev cog khoom.
- Txiav thiab tua kab mob hauv lub lauj kaub, cog, tais, thiab cov cuab yeej.
Fungicides kuj tseem muaj txiaj ntsig hauv kev tshem tawm dahlia powdery mildew. Kev kho mob yuav tsum pib sai li sai tau thaum kuaj pom qhov teeb meem. Siv cov khoom no txhua txhua xya mus rau kaum hnub. (Rau lub txaj sab nraud, rov siv dua tom qab los nag). Nco ntsoov kom huv si saturate saum npoo ntawm nplooj rau qhov zoo tshaj plaws efficiency.
Kev siv cov tshuaj fungicides txuas ntxiv hauv tib chav kawm tshuaj tuaj yeem tsimresistant hom ntawm fungus. Lwm cov tshuaj fungicides thiab txwv tsis pub siv cov tshuaj ib leeg yuav tsim nyog rau kev kho mob dahlia powdery mildew txuas mus ntxiv.
Rau cov organic tswj cov hmoov mildew ntawm dahlias, cov tshuaj sulfur tuaj yeem siv tau. Qhov no ua haujlwm los ntawm kev tsim ib qho chaw tsis zoo rau cov fungus yog li kev tiv thaiv tsis yog teeb meem. Gardeners yuav tsum tsis txhob siv sulfur thaum lub ambient kub siab tshaj 85 degrees F. (29 C.), vim qhov no yuav ua rau cov nroj tsuag raug mob. Cov tshuaj sulfur fungicides yog muag.
Pom zoo:
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