Biology of the diamondback moth (Plutella xylostella) and its future impact in Swedish oilseed rape production : a literature review

Abstract: The biology of the Diamondback moth, Plutella xylostella, and its impact on oilseed rape production is reviewed. The Diamondback moth, DBM, is a serious, migratory, pest and a problem worldwide because its larval stage has a ravenous appetite, which causes major economic losses in Brassica crops. With the effect of global warming and models predicting an increase in temperature an assessment of the future impact of this pest in Swedish oilseed rape production is performed. Sweden is possibly facing a major problem in the future having the DBM at its doorstep as an overwintering seasonal pest with the potential for several generations throughout the growing season. DBM pest status in Sweden varies with memory depending on how serious our sporadic infestations have been. Historical information on the infestations of the DBM in Sweden and reviews of scientific articles concerning DBM biology and control around the world, in particular Canada that shares the same Köppen climate classification, and future problems with the pest are presented. Given the right abiotic conditions it is plausible that DBM has a future as an overwintering pest in Sweden. Integrated pest management practices and creative cropping systems with Brassica crops will play an important role in controlling the pest.