Nkọwa dị mkpirikpi
Paclobutrasol bụ ihe na-eme ka ihe ọkụkụ na-eto eto nwere triazole nke mara na ọ na-egbochi biosynthesis nke gibberellins.Paclobutrasol nwekwara ọrụ antifungal.Paclobutrazol, nke a na-ebufe n'ụzọ acropetally na osisi, nwekwara ike ịkwụsị njikọ nke abscisic acid ma mee ka ọ na-ekpo ọkụ na osisi.
Ethephon bụ ihe a na-ejikarị ahazi ihe ọkụkụ.A na-ejikarị Ethephon eme ihe na ọka wit, kọfị, ụtaba, owu, na osikapa iji nyere mkpụrụ osisi ahụ aka itozu oke ngwa ngwa.Ọ na-eme ka mkpụrụ osisi na akwụkwọ nri chara chara nke ọma.
Gibberellin, ma ọ bụ GA3 maka nkenke, bụ Gibberellin a na-ejikarị eme ihe.Ọ bụ hormone osisi sitere n'okike nke a na-eji dị ka ndị na-ahụ maka uto osisi na-akpali ma nkewa cell na elongation nke na-emetụta akwụkwọ na ị ga.Ngwa nke homonụ a na-emekwa ngwa ngwa ntolite osisi na mpụta mkpụrụ.Egbu oge owuwe ihe ubi nke mkpụrụ osisi, ikwe ka ha na-eto eto ibu.