Ukushisa okuqhubekayo eMichigan njengamanje akukaze kubonwe ngaphambili futhi kubambe abaningi ngokumangala mayelana nokuthi ama-apula akhula ngokushesha kangakanani.Njengoba kubikezelwe izimvula ngoLwesihlanu, ngoMashi 23, nangesonto elizayo,kubalulekile ukuthi izitshalo ezingenwa wutwayi zivikeleke kulesi sigameko esilindelwe ekuqaleni kokutheleleka ngotwayi..
Ekuqaleni kwesizini ka-2010 (okungakabi khona njengalokhu esiyikho manje), isikhunta sotwayi sasingemuva kancane kwezihlahla zama-apula ngenxa yokuthi sibe nesikhathi esengeziwe sokumboza iqhwa esiholela enkathini egcina ukhunta lukhona. overwintering ishiya kubanda.Ukuntuleka kwekhava yeqhwa kule "ntwasahlobo" ka-2012 kanye nokuntuleka kwamazinga okushisa angempela ngesikhathi sasebusika kusikisela ukuthi i-scab fungus isilungele ukuhamba manje.
Ama-apula eningizimu-ntshonalanga ye-Michigan ahlangene futhi aku-0.5-intshi eluhlaza esihlokweni ku-Ridge.Ukuvikela izihlahla ngalesi sikhathi sokukhula ngokushesha kuyisinyathelo sokuqala esibalulekile ekuvimbeleni ubhubhane lotwayi lwama-apula.Cishe sizoba ne-spore load ephezulu kulesi sikhathi sokuqala sokutheleleka ngotwayi.Nakuba lingekho inani elikhulu lezicubu eziluhlaza ezikhona, izifo zotwayi endaweni eluhlaza zingaba nemiphumela emibi kakhulu kwezomnotho.Lokhu kungenxa yokuthi izilonda zoqweqwe eziqalwa eduze kwesihloko esiluhlaza ngokuvamile zizokhiqiza i-conidia phakathi kokuwa okubomvana nokuwa kwe-petal, isikhathi esivamile lapho ama-ascospores ayisisekelo esemanani aphezulu kakhulu.Kuyoba nzima kakhulu ukulawula utwayi ngaphansi komfutho ophakeme we-inoculum kanye nokukhula kwesihlahla ngokuhamba kwesikhathi lapho ukukhula okusheshayo kubangela izicubu ezingavikelekile phakathi kokufakwa kwesibulala-sikhunta.
Ama-fungicides angcono kakhulu atholakalayo ekulawuleni utwayi ngalesi sikhathi sesizini yokuqala yizivikeli ezibanzi: i-Captan kanye ne-EBDCs.Cishe sekwephuze kakhulu ngethusi (bheka isihloko esandulele, “Uhlelo lokusebenza lwe-copper lwesizini yokuqala luzosiza ukugwema ukuzwa 'ukukhathazeka' ngezifo”).Futhi, kushisa kakhulu kuma-anilinopyrimidines (i-Scala neVangard) asebenza kangcono emazingeni okushisa apholile (aphezulu kuma-60s aphansi nangaphansi).I-tank-mix ye-Captan (3 lbs/A Captan 50W) kanye ne-EBDC (3 lbs) iyinhlanganisela enhle kakhulu yokulawula utwayi.Le nhlanganisela isebenzisa ukusebenza kahle kwakho kokubili okubalulekile nokugcinwa okuphakeme nokusabalalisa kabusha kwama-EBDC.Izikhawu zokufutha zidinga ukuba ziqine kunokuvamile ngenxa yenani lokukhula okusha.Futhi, qaphela nge-Captan, njengoba ukusetshenziswa kwe-Captan ngamafutha noma amanye ama-fertilizer angama-foliar kungaholela ku-phytotoxicity.
Sizwa ukukhathazeka okukhulu (okugunyazwe ngokugcwele) mayelana nethemba lesivuno sika-2012. Asikwazi ukubikezela isimo sezulu, kodwa ukulawula utwayi kusenesikhathi kubalulekile.Uma sivumela utwayi lubambe kusenesikhathi, futhi sibe nesivuno, ukhunta luzothola isivuno ngokuhamba kwesikhathi.Utwayi lungenye yezinto esingakwazi ukuyilawula kule sizini yokuqala – asikwenze!
Isikhathi sokuthumela: Mar-30-2021