Ubushushu obuzinzileyo eMichigan ngoku abukho ngaphambili kwaye bubambe abaninzi ngokumangala malunga nendlela ama-apile akhula ngayo ngokukhawuleza.Ngeemvula ezixelwe kwangaphambili ngoLwesihlanu, ngoMatshi 23, nakwiveki ezayo,Kubalulekile ukuba imihlanganiselwa enokuchaphazeleka ukhwekhwe ikhuselwe kwesi siganeko silindelekileyo sosulelo lokhwekhwe.
Ekuqaleni kuka-2010 (eyayingekabikho kwangoku sinjalo ngoku), umngundo wokhwekhwe wawusemva kancinci kwemithi yama-apile ekuphuhliseni ngenxa yokuba sasinexesha elongeziweyo lokugqunywa kwekhephu elikhokelela kwixesha lonyaka elaligcina umngundo ukhona. overwintering amagqabi abandayo.Ukungabikho kwesigqubuthelo sekhephu kule "ntwasahlobo" ka-2012 kunye nokungabikho kwamaqondo okushisa okwenene ngexesha lasebusika kubonisa ukuba i-scab fungus ilungele ukuhamba ngoku.
Ama-apile akumzantsi-ntshona weMichigan akwiqela eliqinileyo kunye nencam eluhlaza eyi-0.5-intshi kwiRidge.Ukukhusela imithi ngeli xesha lophuhliso olukhawulezayo ngendlela emangalisayo linyathelo lokuqala elibalulekileyo lokuthintela ubhubhane wokhwekhwe.Sinokuba nomthwalo ophezulu wespore phaya kweli xesha lizayo lokuqala losulelo lokhwekhwe.Nangona kungekho sixa sikhulu sezicubu eziluhlaza ezikhoyo, usulelo lwe-scab kwincam eluhlaza lunokuba neziphumo ezibi kwezoqoqosho.Oku kungenxa yokuba izilonda zokhwekhwe eziqalwa malunga nencam eluhlaza zihlala zivelisa iconidia phakathi kwepinki kunye nepetali yokuwa, ixesha lesiqhelo apho ii-ascospores eziphambili zingamanani aphezulu.Kuya kuba nzima kakhulu ukulawula ukhwekhwe phantsi koxinzelelo oluphezulu lwe-inoculum kunye nokukhula komthi kwixesha elizayo apho ukukhula okukhawulezileyo kubangela izicubu ezingakhuselekanga phakathi kokufakwa kwemichiza yokungunda.
Eyona michiza yokungunda ekhoyo yokulawula ukhwekhwe ngeli xesha lexesha lokuqala lonyaka zizikhuseli ezibanzi: iCaptan kunye ne-EBDCs.Kunokwenzeka ukuba lide kakhulu ixesha lobhedu (jonga inqaku elidlulileyo, "Ukusetyenziswa kobhedu ngexesha lokuqala kuya kunceda ukunqanda ukuziva 'ubuhlungu' malunga nezifo”).Kwakhona, kushushu kakhulu kwi-anilinopyrimidines (i-Scala kunye neVangard) esebenza ngcono kwiqondo lokushisa elipholileyo (eliphezulu kwi-60s ephantsi nangaphantsi).I-tank-mix ye-Captan (i-3 lbs / i-Captan 50W) kunye ne-EBDC (i-3 lbs) yinhlanganisela ebalaseleyo yokulawula ukhwekhwe.Le ndibaniselwano ithatha inzuzo yokusebenza kwazo zombini izixhobo kunye nokugcinwa okuphezulu kunye nokusasazwa ngokutsha kwee-EBDCs.Amathuba okutshiza kufuneka aqine kunesiqhelo ngenxa yobungakanani bokukhula okutsha.Kwakhona, qaphela i-Captan, njengoko ukusetyenziswa kweCaptan ngeoli okanye ezinye izichumisi ze-foliar kunokukhokelela kwi-phytotoxicity.
Siva inkxalabo eninzi (eqinisekisiweyo ngokupheleleyo) malunga nethemba lesityalo sika-2012. Asikwazi ukuqikelela imozulu, kodwa ukulawula ukhwekhwe kwangethuba kubalulekile.Ukuba sivumela ukhwekhwe ukuba lubambe kwangoko, kwaye sinesityalo, umngundo uya kufumana isityalo kamva.Ukhwekhwe yenye yezinto esinokuzilawula kweli xesha lonyaka lokuqala – masiyenze!
Ixesha lokuposa: Mar-30-2021