Use of natural extract from HOP, thyme, orange and algae to protect potatoes against potato blight ().

The growing demand for alternative plant protection products (PPP) that are more environmentally friendly leads to the investigation of novel approaches in agriculture. The use of plant extracts as PPP belongs to one of the most intensively investigated areas. This study aimed to evaluate if the partial substitution of conventional pesticides with selected botanicals (seaweed extract, orange essential oil, thyme essential oil, and a hop extract) will have the same protective effect against ans as conventional potato treatment.

[Congenital "ectromelia" in fur-bearing animals caused by Orthopoxvirus muris].

Orthopox virus infection is endemic in farms with fur-bearing animals in the Czech Republic (Bohemia and Moravia). This disease is called ectromelia of silver foxes and minks. The infection is congenitally transmitted and manifests itself in reproductive disorders, stillbirth or birth of sick neonates.

[Newcastle disease in Algeria. Study of the pathogenic properties of Newcastle disease virus strains isolated in Algeria].

The Newcastle disease in Algeria: Study of pathogenic properties of the Newcastle disease viral strains isolated in Algeria. The study of pathogenic characters of 14 strains of Newcastle disease virus isolated from 1972 to 1982 was carried out: The following testS were realized: the mean lethal time for the chicken embryo, the pathogenic power index by intravenous way, the pathogenic power index by intracerebral way, the hemagglutination spectrum and the thermal stability of the hemagglutination. In short we can say that these isolated 14 strains are fast-growing.