Kuora kwemazuva mashoma chirwere chinokuvadza chemapatatisi, tomato uye mbeu dzakabatana. Kana zvikakanganiswa, zvibereko zvayo zvakaderedzwa ne70%. Nokudaro, kurapwa kwebatatata tubers vasati vadyara kubva ku phytophthora inzira inonyanya kukosha inobatsira kudzivirira kusara kwezvirimwa zvishoma.
Kurwisa mbatata phytophthora
Apo chirwere chemazambatane ne phytophthora chinokanganisa ma tubers, mashizha uye matanho. Chokutanga pane zvose, zviratidzo zvechirwere zvinowanikwa pazvinomera zvemiti. Mashizha emasikati anooneka pamashizha ezasi uye zvikamu zvakatsaurwa zvehutu, izvo zvinowedzera nokukurumidza. Zvadaro zvinotungamirira kumusiya nekuomeswa kwemashizha, uye munyaya yemumvuri - kuvhuta. Pazvirimwa, phytophthora inozviratidza mumhando ye grayish, uye yobva yemavara, yakaoma mavara. Muchiitiko ichi, necrosis yakasakara inopararira mukati me tuber.
Kukura kwemazuva ekupedzisira kunopera nokukurumidza zvikuru. Munzvimbo inotonhorera uye inonaya, chirwere chinogona kuparadza mbeu panzvimbo ino muvhiki mbiri.
Kudzivirira kuitika kwechirwere kunobatsira kurapwa kwemazai eepatato vasati vadyara kubva ku phytophthora.
Nzira yekurapa mbatatisi kubva ku phytophthora usati wadyara?
Nhanho yekutanga ichava checheche yakakwana yemichero ye mbeu kuitira kuti ione isina kukwana inotapurirwa tuber. Kuwanda kwavo, kunyanya chirwere ichi chichava.
Mukuwedzera, kutarira kukuru kunofanira kubhadhara kune nzvimbo yekudyara mbatata. Nzvimbo yacho inofanira kusarudzwa zvakanaka uye inokuma mushure mvura. Sezvo mutemo, futi yechirwere ichi inokurumidza kuswedera pedyo nenzvimbo yemabhanhire emasango, munzvimbo dzakaderera mumunda. Panzvimbo iyo haifaniri kuva nematanda emasimba. Chikonzero chekuonekwa kwe phytophthora mu mbatata kunogona kuva nechirwere kubva kumamato anonzi tomato, akabatwa nechirwere ichi. Nokudaro, zvinokurudzirwa kuti zviparadzanise kudyara kwavo kubva kune mumwe nemumwe.
Kugadzirira kubereka kwe tubers kunofanira kuitwa. Izvi zvichakurumidza kushandiswa kwekusimudza michero uye kuderedza mukana wekuparadzwa kwavo nekunonoka kwekupedzisira.
Kugadzirwa kwemazambatane kubva ku phytophthors kunoitwa nehuwandu hwekugadzirira:
- Maxim, KS;
- Phytosporin;
- Ridomil Gold MC;
- Bravo;
- Shirlan;
- Ditan M-45.
Kurapa kwemazamu ekirasi nemarongwa aya anokosha kunonoka kukura kwechirwere kwemazuva 10-14. Ichi chiyero chinodikanwa chekuchengetedza chibereko chako munguva yemberi.