Ubushushu obuhlala ixesha elide eMichigan okwangoku abunakuthelekiswa nanto kwaye bubangele ukuba abantu abaninzi bamangaliswe yindlela ama-apile akhula ngayo ngokukhawuleza. Njengoko kuqikelelwa ukuba imvula izakuba ngoLwesihlanu, umhla wama-23 kuMatshi, nakwiveki ezayo,Kubalulekile ukuba iintlobo zezityalo ezichaphazeleka zikhuselwe kwesi siganeko sosulelo lwezikhwebu olulindelweyo kwangethuba.
Ekuqaleni konyaka ka-2010 (okwakungekafiki ekuqaleni njengangoku), i-scab fungus yayisemva kancinci ekuphuhlisweni kwemithi yama-apile kuba sasinexesha elide lokugquma ikhephu ngaphambi kwexesha elaligcina i-fungus ikhona kumagqabi abandayo ebusika. Ukungabikho kwekhephu eligqumayo kule "ntwasahlobo" ka-2012 kunye nokungabikho kwamaqondo obushushu abandayo ebusika kubonisa ukuba i-scab fungus ikulungele ukuhamba ngoku.
Ii-apile kumzantsi-ntshona weMichigan zixinene kwaye ziluhlaza okwe-0.5 intshi kwi-Ridge. Ukukhusela imithi ngeli xesha lokukhula ngokukhawuleza kakhulu linyathelo lokuqala elibalulekileyo lokuthintela ubhubhane we-apile scab. Kusenokwenzeka ukuba sinomthwalo omkhulu we-spore kweli xesha lokuqala losulelo lwe-scab. Nangona kungekho ninzi izicubu eziluhlaza ezikhoyo, usulelo lwe-scab kwi-green tip lunokuba nemiphumo emibi kwezoqoqosho. Oku kungenxa yokuba izilonda ze-scab eziqala kwi-green tip zihlala zivelisa i-conidia phakathi kwe-pink kunye ne-petal fall, ixesha eliqhelekileyo apho ii-ascospores zokuqala ziphezulu khona. Kuya kuba nzima kakhulu ukulawula i-scab phantsi koxinzelelo oluphezulu lwe-inoculum kunye nokukhula komthi kwixesha elizayo apho ukukhula ngokukhawuleza kuphumela kwizicubu ezingakhuselekanga phakathi kokusetyenziswa kwe-fungicide.
Iifungicide ezilungileyo ezikhoyo zokulawula irhashalala ngeli xesha lokuqala kwexesha lonyaka zizinto ezikhusela i-broad-spectrum: iCaptan kunye ne-EBDCs. Kusenokwenzeka ukuba sele kudlule ixesha lokusebenzisa i-copper (jonga inqaku elidlulileyo, “Ukufaka ikopolo ekuqaleni kwexesha lonyaka kuya kunceda ukunqanda ukuziva 'udandathekile' ngezifo"). Kwakhona, kushushu kakhulu kwi-anilinopyrimidines (Scala kunye neVangard) ezisebenza ngcono kumaqondo obushushu apholileyo (aphezulu kuma-60s aphantsi nangaphantsi). Umxube wetanki weCaptan (3 lbs/A Captan 50W) kunye ne-EBDC (3 lbs) ludibaniso oluhle kakhulu lokulawula i-scab. Olu dibaniso lusebenzisa ukusebenza kakuhle kwezinto zombini kunye nokugcinwa okuphezulu kunye nokusasazwa kwakhona kwe-EBDCs. Amaxesha okutshiza kufuneka abe mancinci kunesiqhelo ngenxa yobungakanani bokukhula okutsha. Kwakhona, lumka ngeCaptan, njengoko ukusetyenziswa kweCaptan kunye neeoyile okanye ezinye izichumisi zamagqabi kunokukhokelela kwityhefu ye-phytotoxicity.
Siva inkxalabo eninzi (ngokuqinisekileyo) malunga nethuba lokukhula kwesityalo ngo-2012. Asinakukwazi ukuqikelela imozulu, kodwa ukulawula i-scab kwangethuba kubalulekile. Ukuba sivumela i-scab ibambe kwangethuba, size sibe nesivuno, i-fungus iya kusifumana isivuno kamva. I-scab yenye yezinto esinokuyilawula kweli xesha lonyaka lokuqala - masiyenze!
Ixesha lokuthumela: Matshi-30-2021