Phenyltriethoxysilane; I-PTES (CAS#780-69-8)
Isingeniso: Sibutsetelo
Inhlanganisela ekhonjwe inombolo ye-CAS 780-69-8 ibizwa nge-2,4-dichlorobenzoic acid (2,4-D). Ngenxa yokuphumelela kwayo njengomuthi wokubulala ukhula, lekhemikhali isithole ukuqashelwa kabanzi emkhakheni wezolimo. Kuyasiza kakhulu ekulawuleni ukhula olunamaqabunga abanzi ezitshalweni ezahlukene, okwenza kube ukudla okuyisisekelo emikhubeni yesimanje yezolimo.
I-2.4-D yaqala ukukhiqizwa ngeminyaka yawo-1940s futhi isiphenduke enye yemithi yokubulala ukhula esetshenziswa kakhulu emhlabeni. Indlela yayo yokwenza ihlanganisa ukulingisa amahomoni ezitshalo zemvelo, okwenza ukhula oluhlosiwe lukhule ngokungalawuleki, ekugcineni luholele ekufeni kwalo. Lokhu kukhetha kwenza abalimi bakwazi ukugcina isivuno futhi balawule ngempumelelo ukhula.
Ukwethulwa kwe-2,4-D ekusebenzeni kwezolimo kuthuthukise kakhulu isivuno nokusebenza kahle kwezolimo. Nokho, ukusetshenziswa kwayo akunakuphikiswa. Ukukhathazeka ngomthelela wayo kwezemvelo kanye nobungozi bezempilo obungaba khona kuholele ocwaningweni olubanzi nokubuyekezwa kokulawula. Abacwaningi baphenye imiphumela ye-2,4-D ezintweni ezingaqondiwe, okuhlanganisa izinambuzane ezinenzuzo nezinto eziphila emanzini, kanye nokuhlotshaniswa kwayo okungaba khona nezinkinga zempilo yabantu.
Ukuze kubhekwane nalokhu kukhathazeka, ama-ejensi alawulayo asungule imihlahlandlela yokusetshenziswa ngokuphephile kwe-2,4-D ukuze kuqinisekiswe ukuthi ingasetshenziswa ngempumelelo kuyilapho kuncishiswa izingozi. Ukwengeza, inqubekelaphambili kubuchwepheshe bokwakha iholele ekuthuthukisweni kwezindlela eziqondiswe kakhulu zokufaka isicelo, okuqhubekisela phambili nokunciphisa indawo ezungezile yalo muthi wokubulala ukhula.
Kafushane, i-780-69-8 noma i-2,4-D idlala indima ebalulekile kwezolimo zesimanje, ihlinzeka ngokulawula ukhula okusebenzayo kanye nokuphakamisa izindaba ezibalulekile zokuphepha nokuzinza. Ngokuthuthuka okuqhubekayo kwezindawo zezolimo, ucwaningo oluqhubekayo kanye nezinqubo zokuphatha ezinomthwalo wemfanelo kubalulekile ekulinganiseni izinzuzo nezingozi ezingaba khona zalomuthi wokubulala ukhula.
