Sökning: "host plant preference"
Visar resultat 6 - 10 av 14 avhandlingar innehållade orden host plant preference.
6. Latitudinal patterns in butterfly life history and host plant choice
Sammanfattning : The central subject in this thesis is adaptation of insect populations to different environments along latitudinal gradients. When latitude decreases, the longer favorable season causes an increase in time available for development. However, predictions are complicated by shifts in voltinism. LÄS MER
7. The evolutionary ecology of niche separation : Studies on the sympatric butterflies Leptidea sinapis and Leptidea reali
Sammanfattning : Studies of ecology and evolution have become largely integrated, and increasing attention is paid to the role of ecology for speciation and post speciation divergence. In this thesis I have applied an in-depth approach studying the ecology of a butterfly species pair; the morphologically virtually identical sister-species, the Wood white (Leptidea sinapis) and Reál’s wood white (Leptidea reali). LÄS MER
8. Host-pathogen interactions in root infecting oomycete species
Sammanfattning : The oomycetes include some of the most devastating pathogens on both cultivated crops and wild plants. In the genus Phytophthora some closely related species have a broad host range, while others are very host specific. LÄS MER
9. Finding the right one : Host-plant choice and its transgenerational influence on behaviour and life-history traits in Spodoptera littoralis
Sammanfattning : Herbivorous insects have an intricate relationship with their host plants, which they use as food, oviposition substrate, as well as a rendezvous site for mating. For generalist herbivorous insects that have a wide host range, finding a suitable host plant in a complex environment is of great importance for their offspring’s development and survival. LÄS MER
10. Searching for food in complex environments : Integrating processes at multiple spatial scales
Sammanfattning : Resources are often unevenly distributed through the environment, resulting in a challenging task for insects to locate food, mates and oviposition sites. Consequently, there is an ongoing need to unravel how insects rely on behavioural and sensory traits while searching for resources in heterogeneous environments. LÄS MER