Ukushisa okuqhubekayo eMichigan njengamanje akukaze kwenzeke ngaphambili futhi kushaqise abaningi maqondana nendlela ama-apula akhula ngokushesha ngayo. Njengoba kubikezelwe izimvula ngoLwesihlanu, mhla zingama-23 kuNdasa, kanye nesonto elizayo,Kubalulekile ukuthi izinhlobo zezitshalo ezithinteka yizikhwebu zivikelwe kulesi sigameko sokutheleleka kwezikhwebu okulindelwe kusenesikhathi.
Ekuqaleni kuka-2010 (okwakungakabi sekuqaleni njengamanje), isikhunta se-scab sasisele kancane ngemuva kwezihlahla zama-apula ekuthuthukisweni ngoba sasinesikhathi eside sokumbozwa yiqhwa okuholela esizini esasigcina isikhunta sikhona emaqabunga abandayo ebusika. Ukuntuleka kokumbozwa yiqhwa kule "ntwasahlobo" ka-2012 kanye nokuntuleka kwamazinga okushisa abandayo ebusika kusikisela ukuthi isikhunta se-scab sesilungele ukuhamba manje.
Ama-apula eningizimu-ntshonalanga yeMichigan aqinile futhi aluhlaza okwesiqongo esingamasentimitha angu-0.5 eRidge. Ukuvikela izihlahla phakathi nalesi sikhathi sokukhula okusheshayo kuyisinyathelo sokuqala esibalulekile sokuvimbela ubhubhane lwe-apula scab. Cishe sizoba nomthwalo omkhulu we-spore laphaya kulesi sikhathi sokuqala sokutheleleka kwe-scab. Nakuba kungekho inani elikhulu lezicubu eziluhlaza ezikhona, ukutheleleka kwe-scab echosheni eliluhlaza kungaba nemiphumela emibi kwezomnotho. Lokhu kungenxa yokuthi izilonda ze-scab eziqala eduze kwechosheni eliluhlaza zivame ukukhiqiza i-conidia phakathi kokuwa kwe-pink ne-petal, isikhathi sendabuko lapho ama-ascospores ayinhloko ebalelwa kakhulu. Kuzoba nzima kakhulu ukulawula i-scab ngaphansi kwengcindezi ephezulu kangaka ye-inoculum kanye nokukhula kwesihlahla ngezikhathi zakamuva lapho ukukhula okusheshayo kuphumela khona ezicutshini ezingavikelekile phakathi kokusetshenziswa kwe-fungicide.
Ama-fungicide amahle kakhulu atholakalayo okulawula uqweqwe ngalesi sikhathi sokuqala kwesizini yizivikeli ze-broad-spectrum: i-Captan kanye ne-EBDCs. Kungenzeka ukuthi sekwephuze kakhulu ngethusi (bheka isihloko esedlule, “Ukufakwa kwethusi ekuqaleni kwesizini kuzosiza ekugwemeni ukuzizwa 'ukhathazekile' ngezifo"). Futhi, kushisa kakhulu kuma-anilinopyrimidines (Scala kanye neVangard) asebenza kangcono emazingeni okushisa apholile (aphezulu kuma-60s aphansi nangaphansi). Ingxube yethangi yeCaptan (3 lbs/A Captan 50W) kanye ne-EBDC (3 lbs) iyinhlanganisela enhle kakhulu yokulawula uqweqwe. Le nhlanganisela isebenzisa ukusebenza kahle kwezinto zombili kanye nokugcinwa nokusatshalaliswa okuphezulu kwama-EBDC. Izikhawu zokufafaza kudingeka zibe zincane kunokujwayelekile ngenxa yenani lokukhula okusha. Futhi, qaphela ngeCaptan, njengoba ukusetshenziswa kweCaptan namafutha noma ezinye izivundisi zamaqabunga kungaholela ekubeni yingozi kwezitshalo.
Sizwa ukukhathazeka okukhulu (kuqinisekisiwe ngokugcwele) mayelana nethuba lokutshala isivuno sika-2012. Asikwazi ukubikezela isimo sezulu, kodwa ukulawula isikhunta kusenesikhathi kubalulekile. Uma sivumela isikhunta sibambe kusenesikhathi, futhi sibe nesivuno, isikhunta sizosithola kamuva. Isikhunta singenye yezinto esingazilawula kulesi sikhathi sokuqala - ake sikwenze!
Isikhathi sokuthunyelwe: Mashi-30-2021