0000000000564179
AUTHOR
Sanna Boman
Sublethal effects of deltamethrin exposure of parental generations on physiological traits and overwintering inLeptinotarsa decemlineata
Although the evolution of insecticide resistance has received a lot of attention, less is known about sublethal effects of insecticide stress experienced by the preceding generations on the performance of pest populations. We investigated whether three generations of parental exposure to a deltamethrin insecticide influences physiological traits and overwintering success of offspring in Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae). Beetles descending from insecticide-exposed parents had lower adult body mass but higher relative lipid content and resting metabolic rate than those descending from non-insecticide-exposed parents. Also, a higher proportion of beetles descending f…
The voyage of an invasive species across continents: genetic diversity of North American and European Colorado potato beetle populations
The paradox of successful invading species is that they are likely to be genetically depauperate compared to their source population. This study on Colorado potato beetles is one of the few studies of the genetic consequences of continent-scale invasion in an insect pest. Understanding gene flow, population structure and the potential for rapid evolution in native and invasive populations offers insights both into the dynamics of small populations that become successful invaders and for their management as pests. We used this approach to investigate the invasion of the Colorado potato beetle (Leptinotarsa decemlineata) from North America to Europe. The beetles invaded Europe at the beginnin…
Ecological and genetic factors contributing to invasion success : the northern spread of the Colorado potato beetle (Leptinotarsa decemlineata)
Sanna Boman tutki väitöskirjassaan koloradonkuoriaisen potentiaalia levitä Suomeen. Hän selvitti kuoriaisten mahdollisuuksia selviytyä alhaisissa lämpötiloissa ja kykyä sopeutua Suomen viileään ilmastoon.Boman havaitsi, että koloradonkuoriaisella on potentiaalia levitä Suomeen pysyvästi, sillä geneettiset tekijät ja Suomen kesälämpötilat eivät rajoita koloradonkuoriaisen selviytymistä pohjoisessa.Koloradonkuoriaisilla on geneettistä vaihtelua elinkiertopiirteissä, kuten kehitysajassa ja koossa, minkä avulla kuoriaiset voivat sopeutua entistä paremmin uusiin olosuhteisiin, esimerkiksi alhaiseen lämpötilaan. Koloradonkuoriaiset pystyvät kehittymään ja selviytymään Suomen normaaleissa kesäolos…
Cold tolerance during larval development: effects on the thermal distribution limits of Leptinotarsa decemlineata
Insects' cold tolerance during their development is a surprisingly understudied subject in ecology, despite the fact that subzero temperatures during the growing season are common at high altitudes and latitudes. Subzero temperatures can have detrimental effects on organisms, restricting a species' range. This study addresses the question whether night frosts during the growing season have an instant or delayed negative impact on larval mortality of the Colorado potato beetle, Leptinotarsa decemlineata (Say) (Coleoptera: Chrysomelidae). We also tested whether populations from the centre (Poland) and margins (Russia) of the distribution range of L. decemlineata differ in their responses to s…