Izibulala-zinambuzane ze-Pyrethroid zinezici eziqinile ze-chiral futhi ngokuvamile ziqukethe ama-chiral enantiomers amaningi.Nakuba lawa ma-enantiomers anezakhiwo ezifanayo zomzimba namakhemikhali, abonisa imisebenzi ehluke ngokuphelele yokubulala izinambuzane kanye nezakhiwo zebhayoloji ku-vivo.Ubuthi nezinsalela zemvelo amazinga.NjengeCypermethrin, Beta-Cypermethrin, Alpha-cypermethrin;i-beta-cypermethrin, i-cyhalothrin;I-Beta Cyfluthrin, i-cyfluthrin, njll.

I-Cypermetrin
I-Cypermethrin iyisibulala-zinambuzane esisetshenziswa kakhulu sepyrethroid.Isakhiwo sayo samangqamuzana siqukethe izikhungo ze-chiral ezi-3 nama-enantiomers angu-8.Ama-enantiomers ahlukene akhombisa umehluko omkhulu emsebenzini webhayoloji nobuthi.
Ama-isomer angu-8 optical eCypermethrin enza amapheya angu-4 ama-racemates.Kunomehluko osobala kumphumela wokubulala kanye nesivinini sokuthwebula izithombe sama-isomer ahlukene eCypermethrin ezinambuzaneni.Umsebenzi wabo wokubulala izinambuzane ukusuka kokuqinile kuye ebuthakathakeni yi-cis, i-trans Formula, i-cis-trans cypermethrin.
Phakathi kwama-isomers ayisishiyagalombili eCypermethrin, ama-trans isomers amabili kwamane kanye nama-cis isomers amane asebenza kahle kakhulu.
Kodwa-ke, uma i-isomer eyodwa esebenza kahle kakhulu ye-Cypermethrin isetshenziswa njengesibulala-zinambuzane, hhayi nje kuphela ukuthi umsebenzi wayo wokubulala izinambuzane ungathuthukiswa kakhulu, kodwa futhi nobuthi ezinto eziphilayo ezingahlosiwe kanye nemiphumela emibi emvelweni bungancishiswa.Ngakho-ke iBeta-Cypermetrin ne-Alpha-cypermetrin yaba khona:

I-Alpha-cypermetrin
I-Alpha-cypermethrin ihlukanisa amafomu amabili angasebenzi kahle noma angasebenzi kahle kusukela kungxube equkethe ama-cis-isomers amane, futhi ithola ingxube engu-1:1 equkethe ama-cis-isomers amabili kuphela asebenza kahle kakhulu.
I-Alpha-cypermethrin inomsebenzi ophindwe kabili wokubulala izinambuzane we-Cypermethrin.

I-Beta-Cypermetrin
I-Beta-Cypermethrin, igama lesiNgisi: Beta-Cypermethrin
I-Beta-Cypermethrin ibizwa nangokuthi i-cis-trans cypermethrin esebenza kahle kakhulu.Iguqula indlela engasebenzi ye-cypermethrin yobuchwepheshe equkethe ama-isomer angu-8 ibe ifomu elisebenza kahle kakhulu ngokusebenzisa i-catalytic isomerization, ngaleyo ndlela ithole ama-cis isomer asebenza kahle kakhulu kanye ne-cypermethrin esebenza kahle kakhulu.Inhlanganisela yamapheya amabili ama-racemates ama-trans isomer aqukethe ama-isomer angu-4, futhi isilinganiso se-cis ne-trans sicishe sibe ngu-40:60 noma 2:3.
I-Beta- Cypermethrin inezindawo zokubulala izinambuzane ezifanayo njenge-Cypermethrin, kodwa ukusebenza kwayo kokubulala izinambuzane cishe kuphindwe izikhathi ezingu-1 kune-Cypermethrin.
I-Beta-Cypermethrin ayinabo ubuthi obuncane kakhulu kubantu nasezilwaneni, futhi ubuthi bayo ezinambuzaneni zenhlanzeko bulingana noma bukhulu kune-Alpha-cypermethrin, ngakho-ke inezinzuzo ezithile ekuvimbeleni nasekulawuleni izinambuzane zenhlanzeko.

Fingqa
Njengoba umsebenzi webhayoloji wefomu le-cis-high-efficiency ngokuvamile uphakeme kunalowo wefomu le-trans-high-efficiency, ukuhleleka komsebenzi wokubulala izinambuzane kubafowabo abathathu be-cypermethrin kufanele kube: Alpha-cypermethrin≥Beta-Cypermethrin>Cypermethrin.
Kodwa-ke, i-Beta-Cypermethrin inomphumela ongcono wokulawula izinambuzane ezihlanzekile kuneminye imikhiqizo emibili.