A new American wine pest in canton Tessin.Original Title Neuer amerikanischer Rebschadling im Tessin.

摘要

The American leaf miner Phyllocnistis vitegenella was detected for the first time in Switzerland in 2009 on the vineyards of Mendrisiotto, canton Ticino (Tessin). The first European recording was in the Italian region of Venetia in 1994. It is now recorded all over northern Italy, southern Italy (Apulia) and Slovakia. The small insect, 3 mm long, produces 3-4 generations in the Italian climate. The progression into Switzerland is considered only slow, however the Swiss research station ACW Changis-Wadenswil has decided to start a close monitoring programme. Establishing the risk for leaf damage and grape quality will also be included in the research. The chemical control of Phyllocnistis vitegenella under Swiss conditions is difficult because of the moth's lifecycle and no listed sprays. Biological control is more promising and Italian experience has shown that indigenous parasites are attacking the American leaf miner, however not yet in numbers large enough to control the population during a large-scale infestation.