N'ebe nchekwa ihe ọkụkụ, ndị na-ahụ maka uto ihe ọkụkụ (PGR) na-enyere aka na njikwa nke pests na ọrịa site n'ịkwalite uto na mmepe ihe ọkụkụ na ịkwalite nnabata nrụgide; ha bụ otu n'ime ngwa ọrụ teknụzụ dị mkpa n'ime usoro nchekwa "Green Plant Protection".

Ọnọdụ ọjọọ ndị a na-ahụkarị n'oge ọkọchị-dị ka okpomọkụ dị elu, anwụ anwụ siri ike, na ụkọ mmiri ozuzo—na-ebutekarị uto ahịhịa (etiolation) na arụrụ ọrụ physiological n'ihe ọkụkụ. Ndị na-ahụ maka uto osisi na-edozi okwu ndị a site n'ịgbanwe nguzozi nke homonụ endogenous;

Mepiquat Chloride na Cotton: Nke a bụ ngwa ya kacha gbasaa. Mgbe etinyere ya n'oge mpụta kacha elu ruo n'oge okooko osisi, ọ na-achịkwa ịdị elu osisi nke ọma, na-egbochi oke elongation nke alaka mkpụrụ osisi, ma na-ebelata mwụda boll n'etiti na mpaghara ala nke osisi ahụ, na-ebute mmụba nke 10% ruo 20%.

Ndị na-ahụ maka uto ihe ọkụkụ bụ otu ụdị kemịkalụ-nke a na-emepụta n'ụzọ artificial ma ọ bụ nke ewepụtara n'onwe ya-nwere ike ịgbanwe usoro uto na mmepe nke osisi. Isi usoro ha ji eme ihe bụ iṅomi ma ọ bụ itinye aka na ngbanwe nke homonụ nke osisi (dịka auxins, cytokinins, na gibberellins)

dị ka onye na-ahụ maka uto osisi, Forchlorfenuron na-akpali nkewa sel na mmụba na galik. Nnwale nke ubi egosila na, mgbe etinyere ya nke ọma, ọ nwere ike ịbawanye dayameta nke galik bulbs site na 15-20% ma bulie ibu nke osisi n'otu n'otu ihe dịka 30%.

Brassinolide bụ hormone osisi steroid nke dịpụrụ adịpụ na mbụ na pollen nke rapeseed na 1979 ma ndị ọkà mmụta sayensị ghọtara na 1996 dị ka klas nke isii nke hormones osisi. Ejiri njirimara ya dị elu, nnukwu ọrụ dị iche iche

Sodium Nitrophenolates na-eme ka uto osisi dịkwuo elu, na-agbaji dormancy, na-akwalite mmepe n'ozuzu ya. Ha na-egbochi ịwụfu okooko osisi na mkpụrụ osisi, yana mkpụrụ osisi na-agbawa na ịkụda; Ọzọkwa, ha na-emeziwanye ogo ngwaahịa, na-amụba ihe ọkụkụ, ma na-eme ka ihe ọkụkụ na-eguzogide nrụgide gburugburu ebe obibi dị iche iche-gụnyere ọrịa, pesti, ụkọ mmiri ozuzo, mmiri ozuzo, oyi oyi, salinity, alkalinity, na ebe obibi.

Diethyl aminoethyl hexanoate (DA-6) bụ ihe na-ahụ maka uto ihe ọkụkụ dị iche iche. Ọ na-akwalite uto ihe ọkụkụ, na-eme ka nguzogide oyi na ntu oyi dịkwuo mma, na-eme ka mkpụrụ osisi dịkwuo mma, na-eme ka ọrụ fatịlaịza na-arụ ọrụ nke ọma site n'ịba ụba ọrụ enzyme osisi, na-eme ka photosynthesis dịkwuo mma, na-eme ka nkewa sel na nguzozi na-edozi ahụ.

Ihe ndị a na-eme ihe dị ka "ndị na-ahụ maka ọnọdụ ọnọdụ" n'ime ahụ osisi-nwere ike ibute ihe mgbawa n'ụfọdụ oge, ebe ọ na-ebute ụra dị jụụ na ndị ọzọ. Dịka ọmụmaatụ, Gibberellic acid (GA3) nwere ike ime ka osisi pea dwarf toro ogologo, ebe Abscisic Acid nwere ike ịkpalite mwụsị mkpụrụ osisi.