This group of compounds inhibit the synthesis and function of the cell walls and membranes.

Comprenden productos como el edifenfos y pirazofos: They include products such as edifenfos and pyrazophos:

El Edifenfos, es un fungicida preventivo y erradicante de enfermedades del arroz, provocadas por Pyricularia, oryzae, Thanatephorus cucumeris y Leptosphaeria salvinii. The edifenfos, is a preventive fungicide and erradicante of rice diseases, caused by Pyricularia, oryzae, Thanatephorus cucumeris and Leptosphaeria salvinii.

El pirazofos, tiene propiedades preventivas y curativas sobre mildius polvosos y especies de Helminthosporium. Pyrazohos, has preventive and curative properties on mildius dusty and species of Helminthosporium.