“Methylphenyldichlorosilane;MPDCS; I-Phenylmethyldichlorosilane;PMDCS” (CAS#149-74-6)

Isingeniso Sezinhlanganisela Eziyinhloko149-74-6

Inhlanganisela ene-ID149-74-6ibizwa nge-2,4-dichlorobenzoic acid (2,4-D), isibulala-khula esisetshenziswa kakhulu esidlala indima ebalulekile ekusebenzeni kwezolimo. Lesi sithako sisebenza ngempumelelo kakhulu ekulawuleni ukhula olunamaqabunga abanzi, okwenza kube ukudla okuyisisekelo kwezitshalo ezihlukahlukene, utshani, nezingadi.

I-2,4-D yethulwa okokuqala ngeminyaka yawo-1940s futhi kusukela ngaleso sikhathi ibingomunye wemithi yokubulala ukhula esetshenziswa kakhulu emhlabeni. Ukusebenza kwayo kuhlobene nekhono layo lokulingisa amahomoni ezitshalo zemvelo, angabangela ukukhula okungalawuleki kokhula oluqondiwe futhi ekugcineni luholele ekufeni kwabo. Lokhu kukhetha kwenza abalimi bakwazi ukugcina isivuno futhi balawule ngempumelelo ukhula.

Ukwethulwa kwe-2,4-D ekusebenzeni kwezolimo kushintsha ngokuyisisekelo ukulawulwa kokhula, kunikeze abalimi ithuluzi elithembekile lokukhulisa isivuno nokunciphisa ukuncintisana kwezinsiza. Nokho, ukusetshenziswa kwalomuthi wokubulala ukhula akunakuphikiswa. Ukunaka umthelela wemvelo, ubungozi bezempilo obungaba khona, kanye nokuthuthukiswa kwezinhlobo zokhula ezibekezelela ukhula kubangele ucwaningo oluqhubekayo nokubuyekezwa kokulawula.

Eminyakeni yakamuva, imboni yezolimo ibicwaninga amasu abanzi okulawula ukhula ahlanganisa ukusetshenziswa kwe-2,4-D nezinye izindlela zokulawula ukunciphisa lokhu kukhathazeka. Le ndlela ihlose ukunciphisa ukuncika emithini yokubulala ukhula ngenkathi kugcinwa ukulawula ukhula ngempumelelo.

Ngamafuphi, i-149-74-6 noma i-2,4-dichlorobenzoic acid iyisibulala-khula esibalulekile kwezolimo zesimanje. Ukuqaliswa kwayo kube nomthelela omkhulu ezenzweni zokulawula ukhula, nakuba kuphinde kwaphakamisa izindaba ezibalulekile mayelana nokusimama nokuphepha. Njengoba ucwaningo luqhubeka, i-2,4-D ingase ihlanganise ibhalansi phakathi kokulawula ukhula okuphumelelayo nokuphathwa kwemvelo esikhathini esizayo.