Ubuthi obuphantsi, akukho ntsalela yokulawula ukukhula kwezityalo eziluhlaza – i-prohexadione calcium

I-Prohexadione luhlobo olutsha lolawulo lokukhula kwezityalo lwe-cyclohexane carboxylic acid. Yaphuhliswa ngokubambisana yiJapan Combination Chemical Industry Co., Ltd. kunye ne-BASF yaseJamani. Ithintela i-biosynthesis ye-gibberellin kwizityalo kwaye yenza izityalo Umxholo we-gibberellin uyancipha, ngaloo ndlela ulibazisa kwaye ulawula ukukhula okuncinci kwezityalo. Isetyenziswa kakhulu kwizityalo eziziinkozo, ezifana nengqolowa, irhasi, ukumelana nokumelana nerayisi, ingasetyenziswa nakwiindongomane, iintyatyambo kunye neengca ukulawula ukukhula kwazo.

1 Intshayelelo yeMveliso

Igama eliqhelekileyo lesiTshayina: i-procyclonic acid calcium

Igama eliqhelekileyo lesiNgesi: Prohexadione-calcium

Igama le-compound: i-calcium 3-oxo-5-oxo-4-propionylcyclohex-3-enecarboxylate

Inombolo yokungena kwi-CAS: 127277-53-6

Ifomula yemolekyuli: C10H10CaO5

Ubunzima bemolekyuli obuhambelanayo: 250.3

Ifomula yolwakhiwo:

Iimpawu zomzimba nezekhemikhali: Inkangeleko: umgubo omhlophe; indawo yokunyibilika >360℃; uxinzelelo lomphunga: 1.74×10-5 Pa (20℃); i-octanol/i-partition coefficient: Kow lgP=-2.90 (20℃); uxinano: 1.435 g/mL; I-Henry's constant: 1.92 × 10-5 Pa m3mol-1 (i-calc.). Ukunyibilika (20℃): 174 mg/L emanzini acocekileyo; 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. Uzinzo: ubushushu obuzinzileyo ukuya kuthi ga kwi-180℃; i-hydrolysis DT50<5 d (pH=4, 20℃), 21 d (pH7, 20℃), 89 d (pH9, 25℃); emanzini endalo, i-photolysis yamanzi i-DT50 yi-6.3 d, i-photolysis DT50 emanzini acocekileyo yayiyi-2.7 d (29~34℃, 0.25W/m2).

Ubuthi: Iyeza lokuqala le-prohexadione sisibulali-zinambuzane esinobuthi obuphantsi. I-LD50 yomlomo ebukhali (indoda/ibhinqa) yeempuku yi >5,000 mg/kg, i-LD50 yomlomo ebukhali (indoda/ibhinqa) yeempuku yi >2,000 mg/kg, kwaye i-LD50 yomlomo ebukhali yeempuku (indoda/ibhinqa) yi >2,000 mg/kg. Ubuthi bokuphefumla i-LC50 (iiyure ezi-4, inkunzi/ibhinqa) yi >4.21 mg/L. Kwangaxeshanye, inetyhefu ephantsi kwizinto eziphilayo ezingqongileyo ezifana neentaka, iintlanzi, iintakumba zamanzi, i-algae, iinyosi, kunye neentshulube zomhlaba.

Indlela yokusebenza: Ngokuphazamisa ukwenziwa kwe-gibberellic acid kwizityalo, kunciphisa umxholo we-gibberellic acid kwizityalo, kulawula ukukhula okuncinci, kukhuthaza ukudubula nokuvelisa iziqhamo, kwandisa isivuno, kuphuhlisa iinkqubo zeengcambu, kukhusela ii-membrane zeseli kunye nee-organelle membranes, kwaye kuphucula ukumelana noxinzelelo lwezityalo. Ukuze kuthintelwe ukukhula kwezityalo kwinxalenye ephezulu yesityalo kwaye kukhuthaze ukukhula kokuzala.

2 Ubhaliso

Ngokwengxelo yophando lwe-China Pesticide Information Network, ukusukela ngoJanuwari 2022, iimveliso ze-prohexadione calcium ezili-11 zibhalisiwe kwilizwe lam, kuquka amayeza obuchwephesha amathathu kunye namalungiselelo asi-8, njengoko kubonisiwe kwiTheyibhile 1.

Itheyibhile 1 Ubhaliso lwe-prohexadione calcium kwilizwe lam

3 Amathuba emarike

Njengomlawuli wokukhula kwezityalo eziluhlaza, i-prohexadione calcium iyafana nabalawuli bokukhula kwezityalo be-paclobutrazol, niconazole kunye ne-trinexapac-ethyl. Ithintela i-biosynthesis ye-gibberellic acid kwizityalo, kwaye idlala indima ekukhuleni kwezityalo, Indima yokulawula ukukhula kwezityalo. Nangona kunjalo, i-prohexadione-calcium ayinantsalela kwizityalo, ayinangcoliseko kwindalo esingqongileyo, kwaye ayinampembelelo ingako kwizityalo ezilandelayo kunye nezityalo ezingajoliswanga kuzo. Kunokuthiwa inokusetyenziswa okubanzi kakhulu.