"Methylphenyldichlorosilane;MPDCS; Phenylmethyldichlorosilane;PMDCS” (CAS#149-74-6)
Mau oyamba a Key Compounds149-74-6
Chipinda chokhala ndi ID149-74-6amatchedwa 2,4-dichlorobenzoic acid (2,4-D), mankhwala ophera udzu omwe amagwiritsidwa ntchito kwambiri omwe amagwira ntchito yofunika kwambiri pazaulimi. Gululi limathandiza kwambiri polimbana ndi namsongole, zomwe zimapangitsa kukhala chakudya chofunikira kwambiri cha mbewu zosiyanasiyana, kapinga, ndi minda.
2,4-D idayambitsidwa koyamba m'zaka za m'ma 1940s ndipo idakhala imodzi mwamankhwala omwe amagwiritsidwa ntchito kwambiri padziko lonse lapansi. Kuchita bwino kwake kumagwirizana ndi kuthekera kwake kutengera mahomoni achilengedwe a zomera, zomwe zingayambitse kukula kosalamulirika kwa namsongole wolunjika ndipo pamapeto pake kumabweretsa imfa. Kusankha kumeneku kumathandiza alimi kusunga zokolola ndi kusamalira bwino udzu.
Kukhazikitsidwa kwa 2,4-D pazaulimi kumasintha kwambiri kuwongolera udzu, kupatsa alimi chida chodalirika chowonjezera zokolola komanso kuchepetsa mpikisano wazinthu. Komabe, kugwiritsa ntchito mankhwala a herbicide sikungatsutse. Kusamala za kukhudzidwa kwa chilengedwe, ngozi zomwe zingachitike paumoyo, komanso kupanga mitundu ya udzu wolekerera udzu kwapangitsa kuti kafukufuku apitirize kufufuza ndikuwunikanso malamulo.
M'zaka zaposachedwa, makampani azaulimi akhala akufufuza njira zothana ndi udzu zomwe zimaphatikiza kugwiritsa ntchito 2,4-D ndi njira zina zowongolera kuti achepetse nkhawazi. Njirayi ikufuna kuchepetsa kudalira mankhwala ophera udzu ndikusunga udzu moyenera.
Mwachidule, 149-74-6 kapena 2,4-dichlorobenzoic acid ndi mankhwala ofunikira kwambiri paulimi wamakono. Kukhazikitsidwa kwake kwakhudza kwambiri machitidwe oletsa udzu, ngakhale kuti yadzutsanso nkhani zofunika zokhudzana ndi kukhazikika ndi chitetezo. Pamene kafukufuku akupitilira, 2,4-D ingaphatikizepo kulinganiza pakati pa kuwongolera bwino kwa udzu ndi kasamalidwe ka chilengedwe m'tsogolomu.
