Oleander nrog nws cov paj ilv thiab ci ntsa iab nplooj yog ib qho ornament rau txhua lub vaj - tab sis nws kuj yog ib qho rhiab heev rau ntau yam kab tsuag thiab kab mob. Cov no zoo dua tshwm sim rau thaum xaus ntawm lub caij ntuj no, vim tias cov nroj tsuag tsis muaj zog heev thiab yog li ntawd yooj yim vim tsis muaj lub teeb. Piv txwv li, nplooj grey feem ntau pom ntawm overwintered oleanders, uas tuaj yeem muaj ntau yam ua rau.
Dab tsi ua rau grey nplooj ntawm oleanders?
Grey nplooj ntawm oleanders tuaj yeem qhia tau kab laug sab mite kab mob lossis kab mob fungal xws li mildew lossis grey pwm. Rov da dej dua thiab qhov chaw airy yog pab tiv thaiv kab laug sab mites. Cov kua mis-dej sib tov pab nrog mildew; nrog grey pwm, faded paj yuav tsum tau muab tshem tawm.
Grey, stunted nplooj qhia kab laug sab mites
Stunted nplooj nrog greyish-dawb txheej feem ntau tshwm sim los ntawm kab tsuag kab, feem ntau kab laug sab mites. Sai li cov nplooj zoo li no, cov kab mob twb dhau lawm - lawv tau raug puas tsuaj los ntawm cov kab 'txoj cai nqus thiab yuav tsis rov tsim dua. Tshem tawm cov nplooj thiab da dej oleander nrog lub dav hlau ntse dej. Rov ua cov txheej txheem no dua thiab rov muab cov nroj tsuag tso rau hauv qhov chaw draughtier - kab laug sab mites nyiam sov thiab qhuav, uas yog vim li cas lawv rhiab heev rau cov da dej tsis tu ncua thiab qhov chaw airy. Ntxiv nrog rau kab laug sab mites, kab tsuag xws li kab laug sab liab lossis thrips kuj ua rau kev puas tsuaj tau piav qhia.
kab mob fungal feem ntau ua tau ua rau
Oleander kuj tseem ceeb heev rau ntau yam kab mob fungal. Feem ntau, cov nplooj grey kuj yog tshwm sim los ntawm kev kis kab mob nrog cov kab mob mildew lossis grey rot (grey pwm).
Mildew
Tus kws tshaj lij tau sau ob daim duab sib txawv hauv qab lo lus "mildew". Qhov hu ua powdery mildew ua rau muaj kab mob nrog nplooj npog nrog pluas noj, grey-dawb txheej. Tus kab mob no, uas muaj ntau heev nyob rau hauv oleanders, yog tshwm sim los ntawm cov av noo ntau dhau. Tus tswv tsev fungus deprives cov nroj tsuag ntawm cov khoom muaj txiaj ntsig, yog li ntawd kev loj hlob stalks thiab oleander tsuas yog tsim ob peb paj. Nws yog ib qho tseem ceeb rau kev kho mob nrog cov mis nyuj-dej sib tov (sib tov tag nrho cov mis nyuj thiab dej nyob rau hauv ib tug ratio ntawm 1:10), uas koj muaj peev xwm faib generously rau cov cuam tshuam qhov chaw ntawm cov nroj tsuag siv ib lub raj mis tsuag. Rov ua txheej txheem ob peb zaug ntawm ob peb hnub thiab lub lis piam.
Grey pwm (Botrytis)
Grey pwm tshwm sim feem ntau ntawm ob-paj oleanders; ntau yam nrog ib lub paj yuav luag tsis cuam tshuam. Txhawm rau tiv thaiv qhov no, koj yuav tsum khaws cov paj siv ua ntej muab pov tseg rau lub caij ntuj no thiab yog li deprive cov fungus ntawm txhua yam khoom noj - nws nyob ntawm paj ua ntej.
Tip
Txhawm rau kom tsis txhob muaj kab tsuag los yog fungi, koj yuav tsum tso lub oleander mus rau lub caij ntuj no kom lig li sai tau thiab tshem tawm nws dua kom ntxov li sai tau.
