Ubushyuhe burambye muri Michigan ubu ntabwo bukigeze bubaho kandi bwatunguye benshi mu bijyanye n'uburyo pome zikura vuba. Hamwe n'imvura iteganijwe ku wa gatanu tariki ya 23 Werurwe, no mu cyumweru gitaha,Ni ngombwa ko ubwoko bw'imbuto zishobora kwandura ibihumyo birindwa iki kibazo cy’ubwandu bw’ibihumyo mu gihe cy’imbeho.
Mu ntangiriro z'umwaka wa 2010 (utari ukiri muto nkuko tumeze ubu), imboga zo mu bwoko bwa scab fungus zari inyuma gato y'ibiti by'amapera mu iterambere kuko twari dufite igihe kirekire cyo gupfuka urubura mu gihe cy'imbeho, ibyo bigatuma imboga zo mu bwoko bwa scab zigira ubukonje mu mababi y'itumba. Kuba nta rubura rutwikiriye muri iki "gihe cy'impeshyi" cyo mu 2012 ndetse no kutagira ubukonje bukabije mu gihe cy'itumba bigaragaza ko imboga zo mu bwoko bwa scab fungus ziteguye kuvaho ubu.
Amapera mu majyepfo y'uburengerazuba bwa Michigan ari ku rukuta rukomeye kandi afite uburebure bwa santimetero 1.5 ku nkengero z'ubutaka. Kurinda ibiti muri iki gihe cy'iterambere ryihuse cyane ni intambwe ya mbere y'ingenzi yo gukumira icyorezo cy'udusimba tw'amapera. Birashoboka ko tuzagira udusimba twinshi muri iki gihe cya mbere cy'ubwandu bw'udusimba. Nubwo nta ngano nini y'icyatsi kibisi ihari, ubwandu bw'udusimba tw'amapera ku nkengero z'icyatsi bushobora kugira ingaruka zikomeye ku bukungu. Ibi biterwa nuko udusimba tw'udusimba dutangira ku nkengero z'icyatsi akenshi dutera conidia hagati y'ibara ry'umutuku n'iry'ururabo, igihe gisanzwe aho ascospores z'ibanze ziba nyinshi. Bizagorana cyane kurwanya udusimba tw'amapera munsi y'umuvuduko mwinshi w'ingufu kandi hamwe n'ikura ry'igiti mu bihe bya nyuma aho gukura vuba bivamo udusimba twinshi tudakingiwe hagati yo gukoresha imiti yica udukoko.
Imiti irwanya udukoko twinshi iboneka mu kurwanya ibihumyo muri iki gihe cy'intangiriro z'igihembwe ni imiti irinda udukoko twinshi: Captan na EBDCs. Birashoboka ko byatinze cyane kuri umuringa (reba ingingo ibanza, “Gusiga umuringa mu ntangiriro z'igihe bizafasha kwirinda kumva 'ubabaye' ku ndwara"). Nanone, birashyuha cyane kuri anilinopyrimidines (Scala na Vangard) zigira akamaro kanini mu bushyuhe bukonje (hejuru mu bushyuhe buri munsi ya dogere 60). Uruvange rwa Captan (ibiro 3/A Captan 50W) na EBDC (ibiro 3) ni uruvange rwiza rwo kurwanya uruhu. Uru ruvange rukoresha uburyo ibikoresho byombi bikura neza kandi EBDCs zigakwirakwira neza. Igihe cyo gutera imiti kigomba kuba gito kuruta uko bisanzwe bitewe n'ubwinshi bw'imikurire mishya. Nanone, witondere Captan, kuko gukoresha Captan hamwe n'amavuta cyangwa ifumbire mvaruganda bishobora gutera uburozi ku bimera.
Turi kumva impungenge nyinshi (byumvikana neza) ku bijyanye n'icyitegererezo cy'umusaruro mu 2012. Ntidushobora guhanura ikirere, ariko kurwanya igihumyo hakiri kare ni ingenzi. Nitureka igihumyo kikagenda hakiri kare, kandi tukagira umusaruro, igihumyo kizahita kibona umusaruro nyuma. Igihumyo ni kimwe mu bintu dushobora kugenzura muri iki gihembwe cya mbere - reka tubikore!
Igihe cyo kohereza ubutumwa: Werurwe-30-2021