Ishidi Leqiniso LeDicamba

Phrinta imeyili Ungahlukıselana Ephathwayo

Izindaba zakamuva: Isikhungo Sokuvikelwa Kwezemvelo e-US umemezele ngo-Okthoba 27 kuzovumela abalimi base-US ukuthi baqhubeke nokufafaza izitshalo ngomuthi we-weerkiller we-Bayer AG osetshenziswe kuma-soya kabhontshisi we-GMO kanye ne-cotton, ngaphandle komyalelo wenkantolo ovimba ukuthengisa. NgoJuni an Inkantolo yokudlulisa amacala yanquma ukuthi I-EPA “ibubeke eceleni kakhulu ubungozi” bababulali bokhula be-dicamba. Inqwaba yabalimi ezungeze i-US imangalela iBayer (phambilini eyayiyiMonsanto) kanye ne-BASF ngomzamo wokwenza izinkampani ziphendule ngezigidi zamahektare omonakalo wezitshalo abalimi abathi zibangelwa ukusetshenziswa kakhulu kwe-dicamba. Sithumela imibhalo yokuthola nokuhlaziywa kwezilingo ku- Ikhasi le-Dicamba Papers.

Uhlolojikelele

I-Dicamba (I-3,6-dichloro-2-methoxybenzoic acid) iyinhlangano ebanzi i-herbicide yaqala ukubhaliswa ngo-1967. I-herbicide isetshenziselwa izitshalo zezolimo, umhlaba olinywayo, amadlelo, i-turfgrass kanye ne-rangeland. IDicamba ibhaliswe futhi ekusetshenzisweni okungezona kwezolimo ezindaweni zokuhlala nakwezinye izindawo, ezinjengezinkundla zegalofu lapho isetshenziswa kakhulu ukulawula ukhula lwamaqabunga abanzi njengama-dandelions, i-chickweed, i-clover kanye ne-ivy yomhlabathi.

Imikhiqizo engaphezu kwe-1,000 XNUMX edayiswa e-United States efaka phakathi i-dicamba, ngokusho kweNational Pesticide Information Center. Indlela yokwenza kukaDicamba injenge-auxin agonist: ikhiqiza ukukhula okungalawuleki okuholela ekufeni kwezitshalo.

Ukukhathazeka Ngezemvelo 

Izinhlobo ezindala ze-dicamba zaziwa ngokushushumbisa kude nalapho zisetshenziswe khona, futhi ngokuvamile zazingasetshenziswa kabanzi phakathi nezinyanga ezikhulayo ezifudumele lapho zazingabulala khona izitshalo noma izihlahla ezazingahlosiwe.

I-Ejensi Yezokuvikelwa Kwezemvelo ivume ukubhaliswa kwamafomu amasha e-dicamba ngo-2016, kodwa-ke, ivumela ukusetshenziswa okusha kwezicelo "ezingaphezulu kweziphezulu" ezitshalweni ezikhulayo ze-dicamba ezibekezelela ukotini nezimbotyi zesoya. Ososayensi baxwayise ukuthi ukusetshenziswa okusha kuzoholela ekulimaleni kwe-dicamba drift.

Ukusetshenziswa okusha kwe-dicamba kwenzeka ngenxa yokuthuthukiswa kokumelana nokhula kabanzi emithini yokubulala ukhula eglyphosate, kubandakanya nomkhiqizo odumile weRoundup, owethulwe nguMonsanto ngawo-1970. Ngama-1990s, iMonsanto yethula izitshalo ezibekezelela i-glyphosate, yaphinde yakhuthaza abakwa-famers ukuthi basebenzise izinhlelo zabo zokutshala "Roundup Ready". Abalimi bangatshala isoya sikabhontshisi we-glyphosate obekezelela izakhi zofuzo zikaMonsanto, ummbila, ukotini nezinye izitshalo, bese befutha imishanguzo yokubulala ukhula efana ne-Roundup ngqo ngaphezulu kwezitshalo ezikhulayo ngaphandle kokubabulala. Uhlelo lwenza ukuphathwa kokhula kube lula kubalimi ngoba babekwazi ukufafaza amakhemikhali ngqo kuwo wonke amasimu abo ngenkathi yokukhula, kuqeda ukhula olwaluncintisana nezitshalo ukuthola umswakama nomsoco womhlabathi.

Ukuthandwa kohlelo lweRoundup Ready kwaholela ekwandeni kokumelana nokhula, kepha, kushiya abalimi ngezinsimu zokhula oluqinile ezazingasafi lapho zifuthwa nge-glyphosate.

Ku-2011 iMonsanto imemezele ukuthi i-glyphosate, ibikhona “Uthembele ebangeni elide ngokwako” futhi ithe ihlela ukusebenzisana neBASF nokwenza uhlelo lokutshala izitshalo ezakhiwe ngezakhi zofuzo ezizobekezelela ukufuthwa nge-dicamba. Ithi izokwethula uhlobo olusha lwe-dicamba herbicide olungeke lukhukhuleke luqhelelene namasimu lapho lufuthwe khona.

Kusukela kwethulwa uhlelo olusha, izikhalazo ngomonakalo we-dicamba drift sezikhuphukile ezifundeni eziningana zepulazi, kufaka phakathi izikhalazo eziningi ezivela e-Illinois, Indiana, Iowa, Missouri nase-Arkansas.

Embikweni wangomhla ziyi-1 ku-Novemba 2017, i-EPA ithe ithole uphenyo olusemthethweni lokulimala kwezitshalo ezingama-2,708 (njengokusho kweminyango yezolimo). Le nhlangano ithe bekungaphezu kwamahektare ayizigidi ezingama-3.6 kabhontshisi owathinteka ngaleso sikhathi. Ezinye izitshalo ezithintekile bekungotamatisi, ikhabe, ikantaloupe, izivini, amathanga, imifino, ugwayi, izingadi zokuhlala, izihlahla nezihlahlana

NgoJulayi 2017, uMnyango Wezolimo waseMissouri wakhipha okwesikhashana i- "Stop Sale, Use or Removal Order," kuyo yonke imikhiqizo ye-dicamba eMissouri. Umbuso wasusa lesi sinqumo ngoSepthemba 2017.

Le yimikhiqizo ethile ye-dicamba:

Ngo-Okthoba 31, 2018, i-US Environmental Protection Agency (i-EPA) yamemezela ukwelulwa kokubhaliswa kwe-Engenia, XtendiMax neFeXapan ngonyaka ka-2020 ukuze kusetshenziswe “ngaphezulu” ezindaweni ezingabekezeleleki zikakotini nezimboni zesoya. I-EPA ithe ithuthukise amalebuli wangaphambilini futhi yafaka ezinye izindlela zokuvikela ngomzamo wokukhulisa impumelelo nokusetshenziswa okuphephile komkhiqizo emkhakheni.

Ukubhaliswa kweminyaka emibili kusebenza ngokusemthethweni ngoDisemba 20, 2020. I-EPA isho lezi zinhlinzeko ezilandelayo:

  • Abafakizicelo abaqinisekisiwe kuphela abangafaka i-dicamba ngaphezulu-phezulu (labo abasebenza ngaphansi kweso lomfakisicelo oqinisekisiwe bangabe besakwazi ukwenza izicelo)
  • Vimbela ukusetshenziswa okuphezulu kwe-dicamba kubhontshisi ezinsukwini ezingama-45 ngemuva kokutshala noma kuze kufike esigabeni sokukhula sika-R1 (ukuqhuma kokuqala), noma yikuphi okuza kuqala
  • Vimbela ukusetshenziswa okuphezulu kwe-dicamba kukotini ezinsukwini ezingama-60 ngemuva kokutshala
  • Okotini, nciphisa inani lezicelo ezingaphezulu kwezingu-XNUMX kuya kwezimbili
  • Kosabhontshisi, inani lezicelo ezisezingeni eliphezulu lihlala kwababili
  • Izicelo zizovunyelwa kusuka ehoreni elilodwa ngemuva kokuphuma kwelanga kuya emahoreni amabili ngaphambi kokushona kwelanga
  • Ezifundeni lapho izinhlobo zezilwane ezisengcupheni zingaba khona, isiphepho saphansi sizohlala ezinyaweni eziyi-110 futhi kuzoba ne-buffer entsha engamamitha angama-57 ezungeze ezinye izinhlangothi zensimu (i-110-foot downwind buffer isebenza kuzo zonke izinhlelo zokusebenza, hhayi kuphela ezifundeni lapho izinhlobo ezisengozini yokuphela zingaba khona)
  • Imiyalo yokuhlanza ithangi ethuthukisiwe yohlelo lonke
  • Amalebula athuthukisiwe okuthuthukisa ukuqwashisa kwabafakizicelo kumthelela we-pH ephansi ekushiseni okungenzeka kwe-dicamba
  • Ilebuli ihlanza kanye nokuvumelana ukuze kuthuthukiswe ukuhambisana nokusebenza

Inkantolo Yesicelo Sokudlulisa Amacala yase-9 

NgoJuni 3, 2020. INkantolo Yokudluliswa Kwamacala yase-US Yesekethe Lesishiyagalolunye yathi i-Environmental Protection Agency yephule umthetho ngokugunyaza ukubulala ukhula okwenziwe yi-Bayer, BASF kanye neCorteva Agrisciences. Inkantolo kuguqulwe ukugunyazwa yi-ejensi wemithi yokubulala ukhula ethandwayo esuselwa ku-dicamba eyenziwe yizigebenga ezintathu zamakhemikhali. Lesi sinqumo sikwenze kwaba semthethweni ukuthi abalimi baqhubeke nokusebenzisa lo mkhiqizo.

Kodwa i-EPA yasishaya indiva isinqumo senkantolo, yakhipha isaziso ngoJuni 8 kusho lokho Abalimi bangaqhubeka nokusebenzisa imishanguzo yokubulala ukhula yezinkampani kuze kube nguJulayi 31, yize inkantolo isho ngokukhethekile ngokulandelana kwayo ukuthi ibingafuni ukubambezeleka ekuphumeni lokho kugunyazwa. Inkantolo ibalule umonakalo owenziwe ukusetshenziswa kwe-dicamba ehlobo elidlule ezigidini zamahektare ezitshalo, izivande neziza zemifino ezweni lonke lase-US.

Ngo-June 11, i-2020, abakhongi ecaleni wafaka isimangalo esiphuthumayo ukufuna ukuphoqelela umyalelo wenkantolo nokubamba i-EPA ngendelelo.

Imininingwane engaphezulu ingaba utholwe lapha.

Izinsalela Zokudla 

Njengoba nje ukutholakala kwe-glyphosate emasimini asepulazini kutholakale kushiya izinsalela ze-glyphosate kokudla okuphelile, okufana ne-oatmeal, izinkwa, okusanhlamvu, njll, izinsalela ze-dicamba kulindeleke ukuthi zishiye izinsalela ekudleni. Abalimi abakhiqiziwe kwabo kungcoliswe yizinsalela ze-dicamba nge-drift bazwakalise ukukhathazeka kwabo ngokuthi imikhiqizo yabo ingahle yenqatshwe noma ilimale ngenye indlela kwezentengiso ngenxa yenkinga yezinsalela.

I-EPA ibeke amazinga okubekezelela i-dicamba okusanhlamvu okuningana nenyama yemfuyo edla okusanhlamvu, kepha hhayi ngezithelo nemifino enhlobonhlobo. Ukubekezelelana kwe-dicamba kubhontshisi kusethwe ezingxenyeni eziyi-10 ngesigidi, ngokwesibonelo, e-United States, kanye nezingxenye ezi-2 ngesigidi sikakolweni wokusanhlamvu. Ukubekezelelana kungakwazi ubonwe lapha. 

I-EPA isikhiphile lesi sitatimende maqondana nezinsalela ze-dicamba ekudleni: "I-EPA yenze ukuhlaziywa okudingwa yi-Federal Food, Drug and Cosmetic Act (FFDCA) futhi yanquma ukuthi izinsalela zokudla" ziphephile "- okusho ukuthi kunesiqiniseko sokuthi akukho ukulimala kubantu, kufaka phakathi konke ukubonwa okungakhonjwa ngendlela efanelekile, kufaka phakathi izinsana nezingane, kusuka ekudleni nakwezinye izinto ezingekho emsebenzini ku-dicamba. ”

I-Cancer ne-Hypothyroidism 

I-EPA ithi i-dicamba ayinakuba yi-carcinogenic, kepha ezinye izifundo zithole ingozi eyengeziwe yomdlavuza kubasebenzisi be-dicamba.

Bona lezi zifundo maqondana nemiphumela yezempilo yomuntu ye-dicamba:

Ukusetshenziswa kwe-Dicamba kanye nesifo somdlavuza esifundweni sezempilo sezolimo: ukuhlaziywa okubuyekeziwe I-International Journal of Epidemiology (05.01.2020) “Phakathi kwabafakizicelo abangama-49 922, abangama-26 412 (52.9%) basebenzise i-dicamba. Uma kuqhathaniswa nabafakizicelo ababika ukuthi abayisebenzisi i-dicamba, labo abasengozini ephakeme kakhulu yokuchayeka babe sengozini enkulu yomdlavuza wesibindi nowangaphakathi we-intrahepatic kanye ne-lymphocytic leukemia engapheli kanye nokwehla kwengozi ye-myeloid leukemia. ”

Ukusetshenziswa kwezibulala-zinambuzane kanye ne-Incident Hypothyroidism kubafakizicelo bezibulala-zinambuzane eSifundweni Sezempilo Sezolimo. Izindlela Zempilo Yezemvelo (9.26.18)
"Kuleli qoqo elikhulu labalimi abebesengozini yokutholakala nezibulala-zinambuzane, sithole ukuthi ukusetshenziswa njalo kwezinambuzane ezine ze-organochlorine (i-aldrin, i-chlordane, i-heptachlor, ne-lindane), ama-insecticide amane e-organophosphate (coumaphos, diazinon, dichlorvos, ne-malathion), kanti imithi emithathu yokubulala ukhula (i-dicamba, i-glyphosate, ne-2,4-D) yayihlotshaniswa nengozi eyengeziwe ye-hypothyroidism. ”

I-Hypothyroidism nokusetshenziswa kwezibulala-zinambuzane phakathi kwabasebenzisi bezinambuzane abazimele besilisa esifundweni sezempilo sezolimo. Ijenali Yemithi Yezemvelo Emsebenzini (10.1.14)
"Imithi yokubulala ukhula i-2,4-D, i-2,4,5-T, i-2,4,5-TP, i-alachlor, i-dicamba, ne-oyela kaphethiloli konke kuhlotshaniswa nokwanda kwengozi ye-hypothyroidism"

Ukubuyekezwa kokuchayeka kwezibulala-zinambuzane kanye nezehlakalo zomdlavuza kuqoqo lezempilo leZolimo. Izindlela Zokuphila Zezemvelo (8.1.10)
“Sibuyekeze izifundo ezingama-28; iningi lezibulala-zinambuzane ezingama-32 ezihloliwe bezingahlangene kakhulu nezehlakalo zomdlavuza kubafakizicelo bezibulala-zinambuzane. Izilinganiso zokukhuphuka kwamazinga (noma izingqinamba ezingavumelani) namaphethini okuphendula okuchayeka okuhle abikwe ngemithi yokubulala izinambuzane eyi-12 okwamanje ebhaliswe eCanada kanye / noma e-United States (alachlor, aldicarb, carbaryl, chlorpyrifos, diazinon, dicamba, S-ethyl-N, N- i-dipropylthiocarbamate, imazethapyr, metolachlor, pendimethalin, permethrin, trifluralin). ”

Isigameko Somdlavuza Phakathi Kwabafaka Izicelo Zezibulala-zinambuzane Abachazwe KuDicamba Kwezempilo Yezolimo Isifundo. Izindlela Zempilo Yezemvelo (7.13.06)
“Ukuvezwa kwezinto bekungahlobene nezehlakalo zomdlavuza jikelele futhi bezingekho izinhlangano eziqinile ezinoma yiluphi uhlobo lomdlavuza. Lapho iqembu lesethenjwa lalinabafakizicelo abadalulwe kancane, sabona ukuthambekela okuhle engcupheni phakathi kwezinsuku zokuvezwa kwempilo yonke kanye nomdlavuza wamaphaphu (p = 0.02), kepha azikho izilinganiso zamaphoyinti ngamunye ezaziphakanyiswe kakhulu. Siphinde sabona ukuthambekela okuphawulekayo kwengozi ekhulayo yomdlavuza wekoloni ezinsukwini zombili zokuvezwa kwempilo kanye nezinsuku zokuphila ezinesisindo, yize le miphumela ibangelwe kakhulu yingozi ephezulu ezingeni eliphakeme lokuchayeka.

I-non-Hodgkin's Lymphoma kanye nokuvezwa okuthe ngqo kwezibulala-zinambuzane emadodeni: IsiCross-Canada Study of Pesticides and Health. I-Cancer Epidemiology, Biomarkers kanye nokuvimbela (11.01)
“Phakathi kokuhlanganiswa ngakunye, ekuhlaziyweni kwe-multivariate, ubungozi be-NHL bunyuswe ngokweqile ngokutholakala kwemithi yokubulala ukhula… dicamba (OR, 1.68; 95% CI, 1.00-2.81); … .Kwezinye izinhlobo zama-multivariate, ezibandakanya ukuvezwa kwamanye amakilasi amakhulu amakhemikhali noma izibulala-zinambuzane ngazinye, umdlavuza womuntu siqu owedlule, umlando womdlavuza phakathi kwezihlobo zokuqala, nokuvezwa kwezingxube eziqukethe i-dicamba (OR, 1.96; 95% CI, 1.40– 2.75)… babeyizibikezelo ezibalulekile ezizimele zengozi eyengeziwe yeNHL ”

icala 

Ukukhathazeka ngomonakalo we-dicamba kudale amacala avela kubalimi ezifundazweni eziningi zase-US. Imininingwane ngecala ingatholakala lapha.