Dare reBrazil rakaraira kurambidzwa kwemushonga wekuuraya zvipembenene we2,4-D munzvimbo dzakakosha dzewaini nemaapuro kumaodzanyemba.

Dare riri kumaodzanyemba kweBrazil munguva pfupi yapfuura rakaraira kurambidzwa kwe2,4-D nekukasika, imwe yeinonyanya kushandiswa zvakanyanyamishonga yesorapasi rose, mudunhu reCampanha Gaucha kumaodzanyemba kwenyika. Dunhu iri ndiro rakakosha pakugadzirwa kwewaini dzakanaka nemaapuro muBrazil.

Mutongo uyu wakaitwa kutanga kwaGunyana vachipindura nyaya yemhosva yehurumende yakaendeswa kusangano revarimi vemunharaunda. Sangano revarimi rakati mushonga uyu wakakonzera kukuvara kweminda yemizambiringa nemichero yemaapuro kuburikidza nekudhonzwa kwemishonga. Sekureva kwemutongo, 2,4-D haifanirwe kushandiswa chero kupi zvako munzvimbo yeCampanha Gaucha. Mune dzimwe nzvimbo dzeRio Grande do Sul, zvinorambidzwa kupfapfaidza mushonga uyu wesora mukati memamita makumi mashanu kubva kuminda yemizambiringa nemichero yemaapuro. Kurambidzwa uku kucharamba kuripo kusvika hurumende yenyika yagadzira hurongwa hwakazara hwekutarisa nekuchengetedza mutemo, kusanganisira kuisa nzvimbo dzisingashandiswe munzvimbo dzine njodzi huru.

Vakuru vemunharaunda vakapihwa mazuva zana nemakumi maviri ekushandisa hurongwa hutsva. Kusatevedzera izvi kuchaguma nekubhadhariswa faindi ye10,000 reais (inenge madhora zviuru zviviri ekuAmerica pazuva), iyo ichaendeswa kumari yemubhadharo wezvakatipoteredza yenyika. Mutongo uyu unodawo kuti hurumende izivise zvakanyanya kurambidzwa uku kuvarimi, vatengesi vemishonga yekurima pamwe neveruzhinji.

2,4-D (2, 4-dichlorophenoxyacetic acid) yave ichishandiswa zvakanyanya kubvira kuma1940, kunyanya muminda yesoya, gorosi nechibage. Zvisinei, kushanduka kwayo uye tsika yayo yekusvetukira kunzvimbo dziri pedyo zvakaita kuti ive chinhu chikuru chinokakavadzana pakati pevarimi vezviyo nevagadziri vemichero kumaodzanyemba kweBrazil. Minda yemizambiringa nemichero yemaapuro inonyanya kukanganiswa nemakemikari aya. Kunyangwe kusvetukira kudiki kunogona kukanganisa zvakanyanya kunaka kwemichero, zvichikonzera mhedzisiro yakakura muhupfumi kumaindasitiri ekutengesa waini nemichero. Varimi vanotenda kuti pasina kutarisirwa kwakasimba, goho rese richave panjodzi.

Iyi haisi nguva yekutanga Rio Grande do Sul ichirwisana pamusoro pe2,4-D. Vakuru vemunharaunda vakambomisa kushandiswa kwemushonga uyu, asi uyu ndiwo mumwe wemitemo yakasimba kwazvo yakashandiswa muBrazil kusvika pari zvino. Nyanzvi dzezvekurima dzinoti nyaya iyi inogona kuratidza kuti pane mitemo yakasimba yemishonga inouraya zvipembenene mune dzimwe nyika dzeBrazil, zvichiratidza kusawirirana kuripo pakati pemhando dzakasiyana dzekurima: kurimwa kwezviyo zvakanyanya uye maindasitiri emichero newaini anovimba nemhando yezvigadzirwa uye kuchengetedzeka kwezvakatipoteredza.

Kunyangwe mutongo wacho uchigona kukwidzwa kudare, mutongo we2,4-D ucharamba uchishanda kusvika zvimwe zvisarudzo zvaitwa neDare Repamusoro.