Dib thiab txiv hmab txiv ntoo downy mildew, feem ntau hu ua "zoo siab nees qhuav" thiab "qhuav nplooj", tuaj yeem cuam tshuam rau cov neeg laus cov nroj tsuag ntawm cov yub, feem ntau cuam tshuam rau nplooj thiab stems, tsis tshua muaj tendrils thiab pedicels. Downy mildew muaj qhov cuam tshuam tseem ceeb rau kev loj hlob ntawm cucumbers thiab txiv hmab txiv ntoo, thiab ncaj qha cuam tshuam rau cov qoob loo ntawm cucumbers thiab txiv hmab txiv ntoo. Yog li yuav ua li cas tiv thaiv downy mildew?
Nta
Dimethomorph feem ntau ua rau cov kab mob los ntawm peb yam hauv qab no: kev tiv thaiv kev tiv thaiv, uas tuaj yeem tiv thaiv kev loj hlob thiab cuam tshuam ntawm cov kab mob spores; Cov nyhuv kho, uas tuaj yeem nkag mus rau hauv cov ntaub so ntswg thiab tua cov fungal hyphae; anti-spore nyhuv, uas tuaj yeem tiv thaiv cov kab mob spores los ntawm Kev Tsim, txo qhov chaw ntawm cov kab mob. Qhov no tshwj xeeb mechanism ntawm kev txiav txim thiab cov yam ntxwv ntawm ntau theem ua haujlwm ua rau dimethomorph muaj kev tswj zoo heev ntawm cov kab mob downy mildew thiab blight.
(1) Cov nyhuv zoo thiab ua haujlwm ntev
Dimethomorph muaj cov txheej txheem tshwj xeeb ntawm kev ua haujlwm, ua haujlwm zoo rau txhua theem kev loj hlob ntawm Oomycete fungi, thiab muaj kev cuam tshuam tshwj xeeb rau ntau yam kab mob thiab kab mob. Nws muaj ob qho tib si tiv thaiv thiab kho cov nyhuv, nrog rau cov nyhuv anti-sporulation. Daim ntawv thov ncua sij hawm ntawm dimethomorph feem ntau yog li ntawm 7-10 hnub, uas yog 3-4 hnub ntev dua li lwm tus neeg ua haujlwm, thiab muaj cov nyhuv ntev, uas txo cov tshuaj noj thiab txuag cov sij hawm ua haujlwm thiab cov nqi.
(2) Tsis muaj tshuaj tiv thaiv
Dimethomorph tsis muaj qhov cuam tshuam nrog lwm cov fungicides xws li metalaxyl thiab cymoxanil, thiab muaj peev xwm sib xyaw ua ke, uas tuaj yeem tua cov kab mob sai sai rau lwm cov fungicides thiab ua kom cov tshuaj muaj txiaj ntsig zoo.
(3) Kev tiv thaiv los nag yaig
Super dej-soluble thiab dispersible, muaj zog nkag mus, tuaj yeem nkag mus rau hauv nplooj sai sai thiab kis tau hauv zos, tiv thaiv los nag yaig, thiab kev ua tau zoo ntawm cov tshuaj tsis tshua muaj kev cuam tshuam los nag 1 teev tom qab txau. Txhim kho cov nroj tsuag photosynthesis, ua kom cov txiv hmab txiv ntoo thiab zaub ci dua, thiab ua kom tiav cov qoob loo tawm los thiab zoo;
(4) Kev sib raug zoo
Dimethomorph tuaj yeem ua ke nrog pyraclostrobin, azoxystrobin, cymoxanil, mancozeb, propineb, krysstrobin, thiram, chlorothalonil, triethylphosphonate aluminium, pyraclostrobin, amino oligosaccharins, prochloraz, metalaxyl, Zhongshengmycin lwm yam, iprodione.
(5) Kev ruaj ntseg zoo
Dimethomorph tseem muaj kev nyab xeeb heev txawm tias siv thaum lub sij hawm tawg paj thiab txiv hmab txiv ntoo loj.
