Kho Aster Powdery Mildew: Yuav Ua Li Cas Tswj Aster Powdery Mildew Cov tsos mob

Cov txheej txheem:

Kho Aster Powdery Mildew: Yuav Ua Li Cas Tswj Aster Powdery Mildew Cov tsos mob
Kho Aster Powdery Mildew: Yuav Ua Li Cas Tswj Aster Powdery Mildew Cov tsos mob

Video: Kho Aster Powdery Mildew: Yuav Ua Li Cas Tswj Aster Powdery Mildew Cov tsos mob

Video: Kho Aster Powdery Mildew: Yuav Ua Li Cas Tswj Aster Powdery Mildew Cov tsos mob
Video: Dab neeg Niam tais vam ntau 26/5/2017 2024, Kaum ib hlis
Anonim

Aster paj zoo siab, lub hnub qub zoo li lub paj uas tawg thaum lub caij nplooj zeeg thaum lwm cov paj ntoo tiav rau lub caij. Thaum asters yog ib qho nyuaj, yooj yim loj hlob, thiab yog, qhov tseeb, qhov zoo siab txais tos thaum lub caij nplooj zeeg thaum ntxov, lawv muaj lawv cov teeb meem. Ib qho teeb meem zoo li no, powdery mildew ntawm asters, ua rau kev puas tsuaj rau cov nroj tsuag - ua rau nws tsis pom kev. Kev kho cov kab mob aster powdery mildew nyob ntawm kev txheeb xyuas ntxov ntawm cov tsos mob ntawm tus kab mob fungal.

Aster Powdery Mildew Symptoms

Powdery mildew yog kab mob fungal tshwm sim los ntawm Erysiphe cichoracearum. Nws yog ib yam kab mob uas muaj ntau tshaj plaws nyob rau hauv cov nroj tsuag thiab afflicts tsis yog paj xwb tab sis zaub thiab woody nroj tsuag ib yam nkaus.

thawj qhov qhia txog tus kab mob yog dawb, powdery loj hlob pom ntawm nplooj nplooj. Cov hmoov dawb no yog tsim los ntawm cov xov ntawm cov ntaub so ntswg fungal (mycelium) thiab mats ntawm asexual spores (condia). Cov nplooj me me uas kis tau los ua qhov sib txawv thiab qhov kev loj hlob tshiab yuav stunted. Cov kab mob kis feem ntau tsis qhib. Nplooj yuav wither thiab tuag. Tus kab mob no tshwm sim nyob rau lub caij nplooj ntoos hlav thiab lub caij nplooj zeeg.

Powdery Mildew Aster Control

Powdery mildew fungal spores yooj yimkis tau los ntawm dej thiab cua txav. Cov nroj tsuag muaj kab mob tsis tas yuav muaj kev ntxhov siab lossis raug mob rau cov kab mob fungal no ua rau lawv raug mob, thiab cov txheej txheem kis tsuas yog siv li ntawm peb thiab xya hnub xwb.

Cov kab mob overwinters nyob rau hauv cov kab mob khib nyiab thiab ciaj sia ntawm cov nroj tsuag thiab lwm cov qoob loo. Cov xwm txheej txhawb nqa tus kab mob yog qhov txheeb ze av noo ntau dua 95%, nruab nrab temps ntawm 68 txog 85 degrees F. (16-30 C.), thiab hnub huab cua.

Khaws ib lub qhov muag rau txhua qhov cim ntawm cov kab mob mildew ntawm asters. Kev kis mob tuaj yeem tshwm sim thaum hmo ntuj, yog li nws tseem ceeb heev kom ceev faj. Tshem cov khib nyiab pov tseg thiab pov tseg cov nroj tsuag uas muaj kab mob. Khaws thaj chaw nyob ib puag ncig cov asters kom tsis txhob muaj cov nroj tsuag thiab cov nroj tsuag tuaj yeem pab dawb.

Txwv tsis pub, nws raug nquahu kom txau cov nroj tsuag nrog cov tshuaj fungicide pom zoo ntawm thawj qhov cim ntawm tus kab mob lossis siv sulfur. Nco ntsoov tias sulfur tuaj yeem ua rau cov nroj tsuag puas tsuaj yog tias siv thaum kub tshaj 85 degrees F. (30 C.). Powdery mildew tuaj yeem txhim kho cov kab mob fungicides, tshwj tsis yog leej faj, yog li nco ntsoov siv cov tshuaj tua kab mob.

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