Pyridalyl

Pyridalyl was introduced by Sumitomo in 2004 for the control of Lepidoptera and thrips. It is highly selective for these orders, a preferred characteristic in integrated pest management programs. It appears to have a new mode of action and is active against insects resistant to other compounds.

Pyridalyl is an insecticide used on Bracon mellitor Say, Cardiochiles nigriceps Viereck, Coleomegilla maculata De Geer, Cotesia marginiventris (Cresson), Geocoris punctipes (Say), and other cotton insect pests.

ChEBI: Pyridalyl is an organochlorine insecticide, an organofluorine insecticide and a dichlorobenzene.

The reaction of hydroquinone with 1,1,3-trichloropropene gave 4-(3,3-dichloroallyloxy)phenol, which was then chlorinated and etherified to give 3-[2,6-dichloro-4-(3,3-dichloroallyloxy)phenoxy]propan-1-ol, and finally reacted with 2-chloro-5-trifluoromethylpyridine to give the end product amidopropyl ether.

Pyridalyl is selectively cytotoxic to cells of target species, by an unknown mechanism.

Pyridalyl has low toxicity to non-target organisms. However, because it has a high potential for bioaccumulation and is persistent in soil, sediment and water, and may accumulate with repeated use, it is only approved in the U.S. for greenhouse use.