Efficacy of the fungicide valiphenal against crown rot of rose caused by Phytophthora citrophthora

Crown and root rot caused by soilborne species of Phytophthora are common diseases of container-grown ornamental plants in nursery. Crown rot of Rose caused by P. citrophthora has been recently reported in Sicily (southern Italy). Valiphenal (IR 5885) is a systemic dipeptide fungicide of the valinamide class of compounds and is active against Oomycetes. This new fungicide is under development by the italian agrochemical company ISAGRO against powdery mildews of grapevine, potatoes and vegetables. In this study, the efficacy of Valiphenal and other experimental active ingredients was tested for the first time against crown rot of Rose. Phosetyl-Al (Aliette) was used as a reference product. M…

Monitoraggio visivo su palmacee potenziali ospiti del Punteruolo rosso e del Castnide delle palme presenti in Sicilia

The antimicrobial actitity of water extracts from Labiatae.

In vitro antimicrobial activity of water extracts of oregano, rosemary and sage were tested against five different fungi (Phytophthora cactorum, Verticillium dahliae, Fusarium oxysporum f.sp. lycopersici, Phoma tracheiphila and Botrytis cinerea). Infusion, decoction and maceration methods were used to obtain the extracts. Their inhibent effect on radial fungal growth was determined at three different concentrations (500 mL/L, 50 mL/L and 5 mL/L). After 4, 8 and 12 days the radial growth of the species was measured and fungitoxicity was recorded in terms of percent colony inhibition. The data obtained showed that while the extracts of rosemary and sage were less effective against all fungi t…