Grey leaf spot inodaidzwa zvakare sesame leaf spot nevarimi vemiriwo mukugadzira.Inonyanya kukuvadza mashizha, uye mumatambudziko akaoma, petioles inokuvadzawo.Muchikamu chekutanga chechirwere, mashizha akafukidzwa nemadonhwe maduku akajeka.Maronda acho akanyoroveswa nemvura uye haana kurongeka.Chikamu chepakati chezvironda chine grey-brown kusvika kune yellow-brown.Micheto yezvironda ndeyeyero-brown halos.Maronda akanyura uye 2 kusvika 5 mm muhupamhi., maronda acho anowanzoita perforation mumatanho anotevera.

【Atypical Symptoms】 Maronda acho makwapa akatenderera akatsvukuruka.Mukutanga kwekutanga, mashizha anoratidza zviduku zvitsvuku zvakatenderera.Pakati pechironda chine grey, uye halo yebrown inoonekwa padivi nedivi.Maronda acho akati kurei zvishoma pane grey leaf spot uye ruvara rwakajeka.Mushure mekuwedzera, maronda anoita mavara ebrown akatenderedza uye mashizha anoshanduka yero.Kudzivirirwa nekurapwa kweruvara rwebrown kwakafanana nekweshizha.

【Chikonzero chechirwere】Pathogen inodarika chando muminda sezvo mycelium uye chirwere chinoramba chiripo.Molecular spores inoparadzirwa nekuyerera kwemhepo, mvura yekudiridza, uye kunaya kwemvura, uye inopinda nemu stomata.Kudziya, kunyorova, kunaya kwemamiriro okunze, kudyara kwakaomarara, uye nzvimbo dzine mhepo dzinenge dziine chirwere ichi.Mafashamo, hunyoro hwepamusoro, kusabereka kwakakwana, kukura kwechirimwa chisina simba uye chiitiko chakakomba chechirwere.Kazhinji, kudyara munzvimbo dzakachengetedzwa muchirimo kune chiitiko chepamusoro chechirwere kupfuura mumatsutso, uye kukurumidza kwedenda kunokurumidza.Nekuda kwegoho rakawanda remabhesi ekudyara michero yakaoma, huwandu hwakakwana hwefotereza yemafetereza nefotereza yakasanganiswa inoda kuiswa.Kusiyana neizvi, kurasikirwa kunokonzerwa nezvirwere zvinokonzerwa nembereko uye kutonga kwakawanda hazvidzivisiki., inofanira kubhadharwa zvakanyanya uye kudzivirira kare.

【Nzira yekununura】
Ecological control: Kudyara kwakasimba kunonzwisisika.Kuwanda kwemhando dzakaunzwa kazhinji idiki pane yemhando dzemumba, asi goho rakakwira.Shandisai mafetereza ebhayoloji nemafetireza efosforasi nepotassium, simbisa utariri hwemunda, kuderedza hunyoro, uye kuwedzera kufefetedza kwemhepo uye kutapurirana chiedza.Mushure mekugamuchira zvinhu, bvisa nekukurumidza zvisaririra zvechirwere uye disinfect ivhu.

Chemical control: Zvinokurudzirwa kushandisa general tomato chirwere chekudzivirira uye chekudzora dhizaini yekudzivirira kwese.Nemhaka yokuti inongoerekana yakurumidza uye yakaoma kudzivirira, kutora 25% Azoxystrobin 1500 nguva yekudzivirira ichava nemigumisiro yakanaka kwazvo.