Amaziko okukhula okubuhlobo bokukhula okusingqongileyo ahlulwe ngokubanzi abe ziindidi ezimbini: 1. I-HOFO YEMOFA YOKUGQIBELA Emoyeni okanye i-analog yabo; 2. Imibutho ekhutshwe kwizinto zendalo okanye ifunyenwe ngokuvela kwe-rotial. Oku kuphembelelo ngokubanzi kwindalo kwaye kuthoba ityhefu esezantsi kwizinto ezingabalulekanga (ezinje ngeenyosi kunye neentaka).

Xa ujongana nemiceli mngeni yokukhula kwezityalo ekwindla yasekwindla nasebusika, sihlala sidibana nabo uMgaqo-nkqubo wokukhula kwetyala onjenge-brasigolide, i-DA-6, nesodium nitrophenola. Ngelixa bonke abameli bonke bakhuthaza ukukhula kwezityalo, iipropathi zabo kunye nemithamo enconyelwayo iyahluka. Abalawuli abahlukeneyo baneziphumo ezahlukeneyo zokukhuthaza kunye nemithamo. I-Brasigolide, i-DA-6, nesodium witrophenola malunga neempawu zazo kunye nokugxininiswa okufanelekileyo.

Yintoni indawo yokuhlala yezityalo? Ukukhula kwezityalo zizindlu zezinto ezemichiza ezithintela ukukhula kwezityalo, i-elongwation, kunye nokukhuthaza ukuqhutywa kweqhinga. Ukukhula kwezityalo kuhlala kuhlala kusetyenziswa kwezolimo kunye nokulima ukulawula ukukhula kwezityalo kunye nophuhliso, ukuqinisekisa umgangatho kunye nesivuno sesityalo okanye izityalo zegadi.

Kwisityalo se-thrurt yesityalo, iintlobo ezahlukeneyo zokukhuliswa kwezityalo zisetyenziswa, ngaphezulu kweendidi ezingama-40. Umzekelo, ukukhuthazana kwezityalo kubandakanya i-Gibberellic Acid (GA3), i-Naphthyl Acetic Acid (Naa), i-Naa), i-Iyole Acetic Acid (i-IAA), i-Inale-Boyaccic Acid (IBA), kunye ne-2,4 d; I-Inhibitors yeSityalo iquka i-abscisic acid