Tsawg toxicity, tsis muaj residue ntsuab cog kev loj hlob regulator - prohexadione calcium

Prohexadione yog ib hom tshiab cog kev loj hlob regulator ntawm cyclohexane carboxylic acid.Nws tau koom ua ke tsim los ntawm Nyiv Combination Chemical Industry Co., Ltd. thiab lub teb chaws Yelemees BASF.Nws inhibits biosynthesis ntawm gibberellin hauv cov nroj tsuag thiab ua rau cov nroj tsuag Cov ntsiab lus gibberellin txo qis, yog li ncua thiab tswj kev loj hlob leggy ntawm cov nroj tsuag.Feem ntau yog siv rau hauv cov qoob loo cereal, xws li nplej, barley, mov qhov chaw tiv thaiv, kuj tseem siv tau rau hauv cov txiv laum huab xeeb, paj thiab cov nyom kom tswj lawv txoj kev loj hlob.

1 Khoom Taw Qhia

Suav lub npe: procyclonic acid calcium

Lub npe lus Askiv: Prohexadione-calcium

Khoom npe: calcium 3-oxo-5-oxo-4-propionylcyclohex-3-enecarboxylate

CAS Nr .: 127277-53-6

Cov mis mos molecular: C10H10CaO5

Tus txheeb ze molecular mass: 250.3

Tus qauv qauv:

Lub cev thiab tshuaj lom neeg lub cev: Cov tsos: dawb hmoov;melting point> 360 ℃;vapor siab: 1.74 × 10-5 Pa (20 ℃);octanol / dej muab faib coefficient: Kow lgP = -2.90 (20 ℃);ceev: 1.435 g / mL;Henry qhov tsis tu ncua: 1.92 × 10-5 Pa m3mol-1 (calc.).Solubility (20 ℃): 174 mg / L hauv dej distilled;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.Stability: ruaj khov kub txog 180 ℃;hydrolysis DT50 <5 d (pH = 4, 20 ℃), 21 d (pH7, 20 ℃), 89 d (pH9, 25 ℃);Hauv dej ntuj, dej photolysis DT50 yog 6.3 d, photolysis DT50 hauv dej distilled yog 2.7 d (29 ~ 34 ℃, 0.25W / m2).

Toxicity: Thawj cov tshuaj ntawm prohexadione yog cov tshuaj tua kab uas tsis muaj tshuaj lom.Qhov ncauj mob LD50 (txiv neej / poj niam) ntawm nas yog> 5,000 mg / kg, qhov mob percutaneous LD50 (txiv neej / poj niam) ntawm nas yog> 2,000 mg / kg, thiab qhov ncauj LD50 ntawm nas (txiv neej / poj niam) yog> 2,000 mg/kg.Inhalation toxicity LC50 (4 h, txiv neej / poj niam)> 4.21 mg / L.Nyob rau tib lub sij hawm, nws muaj tsawg toxicity rau ib puag ncig kab mob xws li noog, ntses, dej fleas, algae, muv, thiab earthworms.

Mechanism ntawm kev txiav txim: Los ntawm kev cuam tshuam nrog cov synthesis ntawm gibberellic acid nyob rau hauv cov nroj tsuag, nws txo cov ntsiab lus ntawm gibberellic acid nyob rau hauv cov nroj tsuag, tswj leggy kev loj hlob, txhawb flowering thiab fruiting, nce yield, txhim kho cov hauv paus system, tiv thaiv cell membranes thiab organelle daim nyias nyias, thiab txhim kho. qoob loo kev nyuaj siab.Yog li mus inhibit qhov kev loj hlob ntawm cov nroj tsuag sab sauv thiab txhawb kev loj hlob ntawm cov me nyuam.

2 Kev sau npe

Raws li kev nug ntawm Tuam Tshoj Cov Ntaub Ntawv Tshuaj Tiv Thaiv Kab Mob, txij li Lub Ib Hlis 2022, tag nrho ntawm 11 cov khoom siv calcium prohexadione tau sau npe hauv kuv lub tebchaws, suav nrog 3 cov tshuaj thiab 8 kev npaj, raws li qhia hauv Table 1.

Table 1 Kev tso npe ntawm prohexadione calcium hauv kuv lub tebchaws

3 Kev lag luam zeem muag

Raws li cov nroj tsuag ntsuab regulator, prohexadione calcium yog tib yam li cov nroj tsuag kev loj hlob regulators ntawm paclobutrazol, niconazole thiab trinexapac-ethyl.Nws inhibits biosynthesis ntawm gibberellic acid nyob rau hauv cov nroj tsuag, thiab plays lub luag hauj lwm nyob rau hauv dwarfing qoob loo, Lub luag hauj lwm ntawm kev tswj cov nroj tsuag loj hlob.Txawm li cas los xij, prohexadione-calcium tsis muaj residue ntawm cov nroj tsuag, tsis muaj kuab paug rau ib puag ncig, thiab muaj kev cuam tshuam tsawg dua rau cov qoob loo tom ntej thiab cov nroj tsuag tsis yog hom phiaj.Nws tuaj yeem hais tias nws muaj qhov kev thov dav dav heev.