2024 Tus sau: Chloe Blomfield | [email protected]. Kawg hloov kho: 2023-12-15 23:55
Muaj ntau yam kab mob fungal uas tuaj yeem tua peb cov nroj tsuag, nws tuaj yeem nyuaj los txheeb lawv tawm. Pecan vein spot disease yog tshwm sim los ntawm fungus Gnomonia nerviseda. Nws tsis yog suav tias yog ib qho kab mob txaus ntshai lossis tshwj xeeb, tab sis nws tuaj yeem ua rau defoliation loj heev uas cuam tshuam rau tag nrho tsob ntoo kev noj qab haus huv. Tus kab mob tsis tshwm sim ntawm tua lossis txiv ntoo, tsuas yog nplooj thiab tsuas yog hauv cov ntoo pecan. Qhov xwm zoo yog tias tus kab mob no tsis tshua muaj, ua rau cov qoob loo poob qis, thiab tuaj yeem tiv thaiv lossis txo qis rau feem ntau.
Pecan Vein Spot Disease yog dab tsi?
Pecan ncuav qab zib, pralines, thiab ntau dua yog txhua yam khoom qab zib coj los rau koj los ntawm tsob ntoo pecan. Kev ceeb toom pecan vein cov tsos mob thiab ua kom sai tuaj yeem pab tiv thaiv cov qoob loo ntawm cov txiv ntoo qab. Nrog kev saib xyuas kab lis kev cai zoo thiab qee qhov kev coj ua huv huv, kev kho pecan vein chaw yog tswj tau. Tsis muaj cov npe cultivars uas tiv taus tag nrho tab sis qee qhov zoo li tsis tshua muaj kev cuam tshuam thiab yuav tsum tau suav tias yog hloov pauv rau cov uas muaj kab mob tsis tu ncua.
Pecan vein spot tsos mob zoo li lwm yam kab mob ntawm cov ntoo, zoo li pecan scab. Thawj qhov txhab yog me me, dub mus rau tsaus xim av me ntsis. Hauvnplooj ntawv, cov me ntsis yog nyob rau hauv lub midrib. Raws li cov kab mob loj hlob tuaj, lawv tuaj yeem ua elongated raws cov leeg. Cov leeg nqaij yog ci iab thiab linear thaum pom nyob rau hauv lub hnub thaum khawb yog npub matte thiab puag ncig.
Cov leeg nqaij tsis tshua muaj qhov loj dua 1/4 nti (6 mm.). Cov nplooj petioles kuj yuav kis tau. Tom qab ib pliag, nplooj yuav qhuav thiab poob ntawm tsob ntoo. Kev defoliation heev tuaj yeem cuam tshuam cov nroj tsuag muaj peev xwm ua kom photosynthesize thiab cuam tshuam nws txoj kev noj qab haus huv.
Dab tsi ua rau Pecan Vein Spot?
Cov kab mob ntawm cov kab mob tau tso tawm rau saum huab cua tom qab los nag, feem ntau txij thaum lub caij nplooj ntoo hlav mus txog rau lub Yim Hli hauv qee thaj tsam. Thawj qhov txhab feem ntau pom thaum lub Tsib Hlis. Cov fungus overwinters nyob rau hauv cov kab mob cov ntaub ntawv thiab yuav tsum tau noo noo thiab warmer kub los tsim spores.
Cov spores tso tawm thiab nqa los ntawm cua thiab nag los nag. Cov fungus zoo li cuam tshuam cov ntoo hauv thaj chaw uas muaj me me fertility thiab cov uas tsis muaj zinc. Ib qho ntawm cov cultivars uas muaj kev tiv thaiv zoo rau pecan scab thiab lwm yam kab mob nplooj kuj tiv taus pecan vein chaw.
Pecan Vein Spot Control
Kho pecan vein spot pib nrog kev tu tsob ntoo zoo. Cov uas muaj cov as-ham zoo thiab kev saib xyuas zoo yog feem ntau yuav tsis muaj kev cuam tshuam los ntawm cov kab mob.
Hauv kev kis me me, tsuas yog tshem cov nplooj uas muaj kab mob thiab muab pov tseg. Siv cov chiv uas pom zoo, vim cov ntoo uas tsis muaj zaub mov tsis tshua muaj kab mob.
Ntxhis cov khoom cog cog thaum kawg ntawm lub caij. Txhua yam fungicide tau teev tseg rau kev siv tawm tsam pecan scab yog pom zoo rau pecan veinchaw tswj. Siv thaum ntxov rau lub caij thiab rov ua ntej cov txiv hmab txiv ntoo.
Pom zoo:
Yuav Ua Li Cas Kho Pecan Downy Spot: Tswj Pecan Downy Spot Cov tsos mob
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