PlantVirus #CropDisease #Aphids #OnionCrops #Farming #ManagementStrategies
Onion yellow dwarf virus (OYDV) chirwere chakaipisisa chinokanganisa mhando dzakasiyana dzehanyanisi, kusanganisira shallots, leeks, negariki. Hunokonzerwa nehutachiwana hunorwisa mashizha ehanyanisi, huchikonzera kuderera kwekukura, kutsvuka, uye kufa. OYDV inozivikanwa nekukuvadza zvirimwa zvehanyanisi pasi rose izvo zvakonzera kuti varimi varasikirwe nehupfumi uye kukanganisa kuwaniswa kwehanyanisi pamusika.
Utachiona hweOYDV hunoparadzirwa nemaaphid, tupukanana tuduku tunodya muto wezvirimwa. Kana aphid yabata chirimwa chehanyanisi, utachiona uhwu hunogona kukurumidza kupararira kune dzimwe mbesa dziri munzvimbo iyi, izvo zvinoita kuti zviome kudzivirira denda iri. Pamusoro pezvo, utachiona uhwu hunogona kugara muvhu kwemakore akawanda, zvichiita kuti hurambe huchityisidzira zvirimwa zvehanyanisi.
Kusimukira kuri kuita muongororo yeOYDV kwakaita kuti pawanikwe nzira dzakasiyana dzekutarisira kubatsira varimi kudzora kupararira kweutachiona. Imwe nzira inoshanda ndeyekushandisa mhando dzehanyanisi dzinoramba, idzo dzakataridza kusanyanya kubatwa neOYDV. Imwe nzira ndeyekushandisa mishonga inouraya zvipembenene kudzora huwandu hwema aphid, izvo zvinogona kuderedza kupararira kweutachiona.
Zvakadaro, mhedzisiro yekubuda kweOYDV inogona kuve yakaoma, zvichikonzera kurasikirwa kukuru kwehupfumi kuvarimi uye kukanganisa kuwanikwa uye mutengo wehanyanisi pamusika. Pamwe pacho chirwere chegomarara chinogona kutokonzera kuvharwa kwemapurazi ehanyanisi izvo zvinokanganisa raramo yevarimi nenharaunda dzavanogara.
Hutachiona hwehanyanisi hweyellow dwarf virus hwanyanya kukanganisa zvirimwa zvehanyanisi pasi rose. Nepo kusimukira kwemaitiro ekutonga kwakatungamira nzira dzinoshanda dzekudzora kupararira kwehutachiona, mhedzisiro yekubuda kwechirwere ichi inogona kushungurudza varimi nenharaunda dzavanogara. Naizvozvo, zvakakosha kuenderera mberi nekuedza kutsvagisa kuti unzwisise zviri nani hutachiona uye kugadzira nzira nyowani dzekudzora nekudzivirira kupararira kwayo.