Ngenxa yokushintsha kwesimo sezulu okuqhubekayo, isimo sezulu kanye nezinkathi sezikhathi sezize zibe zingalindeki, zivame ukuholela ekulahlekelweni kwezitshalo. Izibalo zikhombisa ukuthi ama-60% kuya kwayi-80% wokulahleka kwezitshalo okubangelwa ukucindezelwa kwe-Abiotic; Izithelo zezilimo ziphezulu eminyakeni emihle yesimo sezulu futhi ziphansi eminyakeni yesimo sezulu esingesihle. Ama-bio-izivuseleli angabhekana nalezi zinkinga zengcindezi ye-Abiotic.

I-Indoleacetic acid (IAA), Izenzo ze-physiological: Ivimbela i-Plap Senescence, igcina i-parthenocarpy, inyusa i-phototropism, futhi icubungula ukugcwala kwamaselula nokugoba.Kusebenzisa.Ukukhulisa ama-RietTing; kuthela izithelo ezingenazinyawo; Ikhuthaza ukukhula kwemifino kanye nokukhiqizwa kabusha, kuvimbela imbali kanye ne-Fruit Drop, futhi kwandise isivuno; Ikhuthaza ukuhluma kwembewu; futhi kuncenge izingcingo nokwakhiwa kwezimpande emasikweni tezizicu.

Ama-Regulators okukhula emvelweni abezimele ngokuvamile ahlukaniswe izigaba ezimbili: 1. Isitshalo semvelo ama-hormone e-endogenous noma ama-analog abo; 2. Abalawuli bakhishwe ezintweni zemvelo noma batholwe ngokuvutshelwa kwe-microbial. Lokhu ngokuvamile kuyancipha kalula emvelweni futhi kube nobuthi obuphansi ezintweni ezingezona eziqondiwe (njengezinyosi nezinyoni).

Lapho sidingida izinselelo zokukhula kwezilimo ekwindla nasebusika, sivame ukuhlangana nababhali bezitshalo ezinjenge-Brassinolide, i-DA-6, ne-sodium nitrophenates. Ngenkathi laba bantu abakhuthaza ukukhula kwezitshalo, izakhiwo zabo kanye nemithamo enconyiwe iyahlukahluka. Abalawuli abahlukahlukene banemiphumela ehlukile yokukhuthaza nemithamo. I-BrassinoLolide, i-DA-6, ne-sodium nitrophenolates ngayinye inezimpawu zayo kanye nokugxila okuhle.