E maualalo le oona, leai se mea e totoe o le fa'atonuina o le tuputupu a'e o la'au lanumeamata – prohexadione calcium

O le Prohexadione o se ituaiga fou o le faʻatonutonuina o le tuputupu aʻe o laʻau o le cyclohexane carboxylic acid.Na fausia fa'atasi e le Japan Combination Chemical Industry Co., Ltd. ma le BASF a Siamani.E taofia ai le biosynthesis o le gibberellin i totonu o laʻau ma faia ai laʻau O le gibberellin e faʻaitiitia, ma faʻatuai ai ma pulea le tuputupu aʻe vae o laau.E masani ona faʻaaogaina i fualaʻau faʻatoʻaga, e pei o saito, karite, alaisa e nofo ai, e mafai foi ona faʻaaogaina i pinati, fugalaau ma mutia e pulea ai lo latou tuputupu aʻe.

1 Folasaga o oloa

igoa masani Saina: procyclonic acid calcium

Igilisi igoa masani: Prohexadione-calcium

Igoa fa'afefiloi: calcium 3-oxo-5-oxo-4-propionylcyclohex-3-enecarboxylate

Numera fa'aopoopo CAS: 127277-53-6

fua mole: C10H10CaO5

Masisa mole mole: 250.3

Fua fa'atatau:

Mea fa'aletino ma kemisi: Fa'aaliga: pa'epa'e pa'epa'e;mea liusuavai >360℃;ausa mamafa: 1.74×10-5 Pa (20 ℃);octanol/vaega vai: Kow lgP=-2.90 (20℃);mamafa: 1.435 g/mL ;Ole tumau a Henry: 1.92 × 10-5 Pa m3mol-1 (calc.).Solubility (20 ℃): 174 mg/L ile vai fa'amama;methanol 1.11 mg/L, acetone 0.038 mg/L, n-hexane <0.003 mg/L, toluene 0.004 mg/L, ethyl acetate <0.010 mg/L, iso Propanol 0.105 mg/L, dichloromethane 0.004 mg/L.Mauaina: tumau le vevela e oʻo atu i le 180 ℃;hydrolysis DT50<5 d (pH=4, 20 ℃), 21 d (pH7, 20 ℃), 89 d (pH9, 25 ℃);i le vai faanatura, vai photolysis DT50 o le 6.3 d, o le photolysis DT50 i vai distilled sa 2.7 d (29 ~ 34℃, 0.25W/m2).

O'ona: O le ulua'i vaila'au o le prohexadione ose vaila'au e maualalo le o'ona.O le LD50 tu'u gutu ma'i (tane/fa'afafine) o isumu e >5,000 mg/kg, o le LD50 (tane/fa'afafine) o isumu e >2,000 mg/kg, ma le LD50 tu'u gutu o isumu (tane/fa'afafine) e > 2,000 mg/kg.O'ona oona LC50 (4 h, tane/fa'afafine)> 4.21 mg/L.I le taimi lava e tasi, e maualalo le oona i meaola o le siosiomaga e pei o manulele, iʻa, fuga vai, algae, pi, ma anufe.

Mechanism of action: E ala i le faʻalavelave i le tuʻufaʻatasia o le gibberellic acid i totonu o laʻau, e faʻaitiitia ai mea o loʻo i totonu o le gibberellic acid i totonu o laʻau, pulea le tuputupu aʻe vae, faʻaleleia le fuga ma fua, faʻateleina fua, atiina ae aʻa, puipuia sela sela ma membrane okeni, ma faʻaleleia. fa'ato'aga fa'ato'aga.Ina ia faʻalavelaveina le tuputupu aʻe o le pito i luga o le laau ma faʻateleina le tuputupu aʻe.

2 Faamauina

E tusa ai ma le suʻesuʻega a le China Pesticide Information Network, ia Ianuari 2022, e 11 le aofaʻi o oloa prohexadione calcium ua resitalaina i loʻu atunuu, e aofia ai le 3 vailaʻau faʻapitoa ma le 8 sauniuniga, e pei ona faʻaalia i le Laulau 1.

Laulau 1 Fa'amauina o prohexadione calcium i lo'u atunu'u

3 Fa'amoemoega maketi

I le avea ai o se faʻatonuga o le tuputupu aʻe o laʻau lanumeamata, o le calcium prohexadione e tutusa ma le faʻatonutonuina o le tuputupu aʻe o laau o le paclobutrazol, niconazole ma le trinexapac-ethyl.E taofia ai le biosynthesis o le gibberellic acid i laau toto, ma faia se sao i le dwarfing fua, Le matafaioi o le pulea o le tuputupu ae o laau.Ae ui i lea, o le prohexadione-calcium e leai se toega i luga o laʻau, leai se faʻaleagaina o le siosiomaga, ma faʻaitiitia le aʻafiaga i faʻatoʻaga mulimuli ma laau e le o faʻatatauina.E mafai ona fai atu e matua lautele le faʻamoemoega o le faʻaogaina.