Persistence of the systemic activity of metalaxyl and fosetyl-Al applied as a soil drench or foliar spray to control Phytophthora crown rot of peach [Prunus persica (L.) Batsch]
2002
Thomidis, T. (National Agricultural Research Foundation (NAGREF), Naoussa (Greece). Pomology Inst.)
English. The persistence of the fungicides metalaxyl and fosetyl-Al, when applied by soil drenching or as foliar sprays against crown rot of peach by Phytophthora cactorum or P. citrophthora, was examined. Metalaxyl and fosetyl-Al applied by soil drenching inhibited both Phytophthora species for 40 days, but inhibition was reduced after 60 days. Foliar application with fosetyl-Al inhibited both pathogens for at least 20 days, but metalaxyl was ineffective as a foliar spray. The data suggest that, when applied as a soil drench, both metalaxyl and fosetyl-Al provide effective control of Phytophthora crown rot of peach trees
Show more [+] Less [-]Italian. [E' stata esaminata la persistenza dei fungicidi metalaxyl e fosetyl-Al, applicati mediante bagnatura del terreno o irrorazioni fogliari contro il marciume del colletto del pesco causato da Phytophthora cactorum o P. citrophthora. Metalaxyl e fosetyl-Al somministrati mediante bagnatura del terreno inibivano entrambe le specie di Phytophthora per 40 giorni, ma l'inibizione veniva ridotta dopo 60 giorni. L'applicazione fogliare di fosetyl-Al inibiva ambedue i patogeni per almeno 20 giorni, ma metalaxyl risultava inefficace sotto forma di irrorazione fogliare. I dati fanno ritenere che, sotto forma di bagnatura fogliare, sia metalaxyl, sia fosetyl-Al sono in grado di controllare efficacemente il marciume del colletto delle piante di pesco determinato da Phytophthora]
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