Lig blight yog ib yam kabmob phem heev ntawm cov qos yaj ywm, txiv lws suav thiab lwm yam qoob loo. Nyob rau hauv cov ntaub ntawv ntawm kev puas tsuaj, nws tawm los yog txo los ntawm 70%. Yog li ntawd, kev kho mob ntawm qos tubers ua ntej cog los ntawm phytophthora yog ib qho tseem ceeb heev txheej txheem uas yuav pab tiv thaiv tau yav tom ntej cov qoob loo poob.
Sib ntaus qos phytophthora
Thaum tus kab mob ntawm cov qos yaj ywm nrog phytophthora cuam tshuam nws tubers, nplooj thiab stems. Thawj zaug ntawm tag nrho cov, cim ntawm tus kab mob no pom ntawm sprouts ntawm zaub. Tsaus nplooj pib tshwm ntawm qis nplooj thiab cais qhov chaw ntawm qia, uas sai nce. Tom qab ntawd nws ua rau blackening thiab ziab ntawm nplooj, thiab nyob rau hauv cov ntaub ntawv ntawm humidity - mus rau rotting lawv. On tubers, phytophthora manifests nws tus kheej nyob rau hauv daim ntawv ntawm grayish, thiab ces xim av, nyuaj me ntsis. Nyob rau hauv rooj plaub no, rusty necrosis kis tau hauv tuber.
Kev loj hlob ntawm lig blight tshwm sim heev sai sai. Nyob rau hauv txias thiab humid huab cua, tus kab mob no muaj peev xwm ua puas nroj tsuag on lub site nyob rau hauv 1-2 lub lim tiam.
Tiv thaiv qhov tshwm sim ntawm tus kab mob yuav pab kho cov qos yaj ywm noob ua ntej cog los ntawm phytophthora.
Yuav ua li cas kho qos yaj ywm los ntawm phytophthora ua ntej cog?
Thawj kauj ruam yuav yog ib qho kev tshawb xyuas txhij txhua ntawm cov noob khoom thiaj li txheeb tau cov kab mob uas raug tus kab mob. Qhov ntau ntawm lawv, qhov ntau tshwm sim tau tus kab mob yuav.
Tsis tas li ntawd, ntau xim yuav tsum tau them mus rau qhov chaw cog qos yaj ywm. Lub tsev kawm ntawv yuav tsum tau xaiv zoo drained thiab sai sai qhuav tom qab los nag. Raws li txoj cai, lub foci ntawm tus kab mob sai sai flare li ze ntawm qhov chaw ntawm hav zoov kem, nyob rau hauv qis qhov chaw nyob rau hauv lub field. Nyob rau hauv lub tsev kawm ntawv yuav tsum tsis txhob muaj zog hluav taws xob. Qhov ua rau ntawm tsos ntawm phytophthora nyob rau hauv qos yaj ywm muaj peev xwm yuav kis tau los ntawm lws suav seedlings, cuam tshuam los ntawm tus kab mob no. Yog li ntawd, nws yog pom zoo kom cais tawm lawv cov cog ntawm txhua lwm yam.
Preplant germination ntawm tubers yuav tsum tau nqa tawm. Qhov no yuav ua rau txoj kev loj hlob ntawm txoj kev cog thiab txo qhov yuav ua rau lawv cov kev puas tsuaj los ntawm lig blight.
Kev ntawm qos yaj ywm los ntawm phytophthors yog nqa tawm nrog cov nram qab no npaj:
- Maxim, KS;
- Phytosporin;
- Ridomil Kub MC;
- Bravo;
- Shirlan;
- Ditan M-45.
Kev kho mob ntawm qos tubers nrog no tshwj xeeb npaj yuav ncua kev loj hlob ntawm tus kab mob rau 10-14 hnub. Qhov no yog ib qho kev ntsuas tsim nyog los tiv thaiv koj cov qoob loo yav tom ntej.