Indole-3-butyric acid (IBA) o se faʻatonuga o le tuputupu aʻe o laʻau e mafai ona faʻaleleia le tuputupu aʻe ma le atinaʻeina o laʻau, faʻaleleia atili le laʻau ma le malosi, ma faʻaleleia le puipuiga o le laau ma le faʻalavelave.

Brassinolide (BRs) ose fa'atonuga lelei o le tuputupu a'e o la'au fa'aaogaina e fa'aitiitia ai le fa'aleagaina o vailaau fa'asaina. Brassinolide (BRs) e mafai ona fesoasoani lelei i fualaʻau e toe faʻaauau le tuputupu aʻe masani, vave faʻaleleia le lelei o mea tau faʻatoʻaga ma faʻateleina fua o fualaʻau, aemaise i le faʻaitiitia o le faaleagaina o le herbicide. E mafai ona faʻavaveina le tuʻufaʻatasia o amino acids i totonu o le tino, faʻaleleia mea amino na leiloa ona o le faʻaleagaina o vailaau faʻasaina, ma faʻafetaui manaʻoga o le tuputupu aʻe o fualaʻau, ma faʻaitiitia ai le faʻaleagaina o vailaau faʻasaina.

O le Defoliant o se faʻatonuga o le tuputupu aʻe e mafai ona faʻalauteleina laau e sasaa lau i le tautoulu, faʻapuupuu le taimi o le tuputupu aʻe o laʻau, faʻaleleia le lelei o le photosynthesis o laʻau, ma faʻaleleia le teteʻe o le laau i le atuatuvale ma le malulu. O le faiga o gaioiga a defoliant o le faʻatonutonuina lea o le maualuga o hormones endogenous, matua o laulaau, ma faʻamalosia le faʻamaligiina. Mo laau ua leva ona i ai i se siosiomaga maualalo le vevela, o le faʻaaogaina talafeagai o defoliants e mafai foi ona faʻaleleia lelei lo latou tuputupu aʻe ma atinaʻe.

Fa'aletino ma kemisi o le forchlorfenuron (KT-30). Forchlorfenuron o se tasi o vaega autu i le sua popo. O le uluai vailaʻau o se paʻu paʻepaʻe paʻepaʻe, e le mafai ona faʻafefe i le vai, ma faigofie ona solu i solu faʻaola pei ole acetone ma ethanol.