Institut für Pflanzenschutz in Ackerbau und Grünland
As part of the project, experiments will be carried out over three growing seasons under controlled conditions in the laboratory / semi-open field and in the field to investigate the biology of the winter stem weeevil, Ceutorhynchus picitarsis. The aim is to develop and test a damage threshold for this species and to provide better knowledge for an integrated control of this pest species. It is investigated (i) whether females carry out a maturation feeding, how long this lasts and from when oviposition can be expected after the migration into the oilseed rape fields, (ii) what the oviposition capacitiy per female is, how long ovipositions lasts and how it is affected by temperature, (iii) how the development and mortality of the larvae are affected by temperature, (iv) how the beetle density is related to the larval infestation and resulting plant damage and (v) how sensitive adults and larvae of the winter stem weevils are to various chemical and non-chemical products, (vi) which parasitoids are found in natural populations of this species.
Union zur Förderung von Oel- und Proteinpflanzen e.V.
