Ubuthi obuphansi, akukho nsalela yokulawula ukukhula kwezitshalo eziluhlaza – i-prohexadione calcium

I-Prohexadione uhlobo olusha lokulawula ukukhula kwezitshalo lwe-cyclohexane carboxylic acid. Yakhiwa ngokubambisana yi-Japan Combination Chemical Industry Co., Ltd. kanye ne-BASF yaseJalimane. Ivimbela ukwenziwa kwe-gibberellin ezitshalweni futhi yenza izitshalo Okuqukethwe kwe-gibberellin kuyancishiswa, ngaleyo ndlela kubambezele futhi kulawule ukukhula okuqinile kwezitshalo. Isetshenziswa kakhulu ezitshalweni zokusanhlamvu, njengokolweni, ibhali, ukumelana nokumelana nokufakwa kwelayisi, ingasetshenziswa futhi kumakinati, izimbali kanye notshani ukulawula ukukhula kwazo.

1 Isingeniso Somkhiqizo

Igama elivamile lesiShayina: i-procyclonic acid calcium

Igama elivamile lesiNgisi: Prohexadione-calcium

Igama elihlanganisiwe: i-calcium 3-oxo-5-oxo-4-propionylcyclohex-3-enecarboxylate

Inombolo yokungena ye-CAS: 127277-53-6

Ifomula yama-molecule: C10H10CaO5

Isisindo sama-molecule esihlobene: 250.3

Ifomula yesakhiwo:

Izakhiwo zomzimba nezamakhemikhali: Ukubukeka: impuphu emhlophe; iphuzu lokuncibilika >360℃; umfutho womusi: 1.74×10-5 Pa (20℃); i-octanol/i-water partition coefficient: Kow lgP=-2.90 (20℃); ubuningi: 1.435 g/mL; I-Henry's constant: 1.92 × 10-5 Pa m3mol-1 (i-calc.). Ukuncibilika (20℃): 174 mg/L emanzini acwecwekile; i-methanol 1.11 mg/L, i-acetone 0.038 mg/L, i-n-hexane 0.003 mg/L, i-toluene 0.004 mg/L, i-ethyl acetate 0.010 mg/L, iso Propanol 0.105 mg/L, i-dichloromethane 0.004 mg/L. Ukuzinza: izinga lokushisa elizinzile kufika ku-180℃; i-hydrolysis DT50<5 d (pH=4, 20℃), 21 d (pH7, 20℃), 89 d (pH9, 25℃); emanzini emvelo, i-photolysis yamanzi i-DT50 ingu-6.3 d, i-photolysis DT50 emanzini acwengekile yayingu-2.7 d (29~34℃, 0.25W/m2).

Ubuthi: Umuthi wokuqala we-prohexadione uyisibulala-zinambuzane esinobuthi obuphansi. I-LD50 yomlomo ebukhali (yesilisa/yesifazane) yamagundane ingu->5,000 mg/kg, i-LD50 ebukhali (yesilisa/yesifazane) yamagundane ingu->2,000 mg/kg, kanti i-LD50 yomlomo ebukhali yamagundane (yesilisa/yesifazane) ingu->2,000 mg/kg. Ubuthi bokuphefumula i-LC50 (amahora ama-4, yesilisa/yesifazane) ingu->4.21 mg/L. Ngesikhathi esifanayo, inobuthi obuphansi ezintweni eziphilayo zemvelo njengezinyoni, izinhlanzi, izintwala zamanzi, ulwelwe, izinyosi, kanye nezibungu zomhlaba.

Indlela yokusebenza: Ngokuphazamisa ukwakheka kwe-gibberellic acid ezitshalweni, kunciphisa okuqukethwe kwe-gibberellic acid ezitshalweni, kulawula ukukhula okuqinile, kukhuthaza ukuqhakaza nokuthela izithelo, kwandisa isivuno, kuthuthukisa izinhlelo zezimpande, kuvikela ulwelwesi lwamaseli kanye nolwelwesi lwe-organelle, futhi kuthuthukisa ukumelana nokucindezeleka kwezitshalo. Ukuze kuvinjelwe ukukhula kwezitshalo engxenyeni engenhla yesitshalo futhi kukhuthaze ukukhula kokuzala.

2 Ukubhalisa

Ngokusho kophenyo lwe-China Pesticide Information Network, kusukela ngoJanuwari 2022, sekubhaliswe imikhiqizo ye-prohexadione calcium engu-11 ezweni lami, okuhlanganisa imithi yobuchwepheshe emithathu kanye namalungiselelo angu-8, njengoba kuboniswe kuThebula 1.

Ithebula 1 Ukubhaliswa kwe-prohexadione calcium ezweni lakithi

3 Amathemba Emakethe

Njengomlawuli wokukhula kwezitshalo oluhlaza, i-prohexadione calcium iyafana nabalawuli bokukhula kwezitshalo be-paclobutrazol, i-niconazole kanye ne-trinexapac-ethyl. Ivimbela ukwenziwa kwe-gibberellic acid ezitshalweni, futhi idlala indima ekukhuleni kwezitshalo ezincane, Indima yokulawula ukukhula kwezitshalo. Kodwa-ke, i-prohexadione-calcium ayinazo izinsalela ezitshalweni, ayinangcoliso emvelweni, futhi ayinawo umthelela omkhulu ezitshalweni ezilandelayo kanye nezitshalo ezingahlosiwe. Kungashiwo ukuthi inombono obanzi kakhulu wokusetshenziswa kwayo.