Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Registration and control of the nun moth Lymantria monacha L.

Abstract

Monitoring of Lymantria monacha (L.) was carried out in forest stands at 112 localities in Denmark in 1980-82 using open-sheet sticky traps treated with disparlure. Males were caught in the traps at all localities, the highest numbers being recorded in the larger plantations of spruce [Picea]. In general, captures increased slightly from 1980 to 1981 but fell considerably in 1982. The effectiveness of monitor traps in detecting local outbreaks was poor, since captures decreased to background levels within 1 km. In experiments with microencapsulated disparlure using the pheromone confusion technique, 2.5-3 times fewer eggs and larvae were found in the treated area as in untreated ones.