The effect of the game deterrent Wöbra on attacks by the poplar clearwing moth,Paranthrene tabaniformis Rott. (Lep., Sesiidae)

Abstract

The game deterrent “Wobra”, a copolymer containing quartz sand, is smeared on trees to deter mammals from damaging the bark. An experiment showed that Wobra might act as a physical barrier against woodboring insects but it did not prevent infestations by larvae ofParanthrene tabaniformis (Lep.; Sesiidae) in one-year-old poplars. Wobra had not adversely affected the annual height increment of the treated trees up to three years after application.