Publications by authors named "Niklas Hamaekers"
Article Synopsis
- Orchard bees, especially from the genus Osmia, play a vital role as pollinators for fruit trees and some species are commercially available in the U.S. and Europe.
- This study focuses on developing a chronic oral toxicity test for various Osmia species to assess the impacts of pesticides more effectively, addressing gaps in previous research.
- The results showed that different species demonstrated varying levels of body mass, consumption, and survival rates, with the median lethal doses for dimethoate being quite similar among the studied species, which aids in comparing toxicity profiles across different bee types.
Background: Spodoptera frugiperda, fall armyworm (FAW) is the major pest of maize in Brazil and has readily acquired field resistance to a broad range of synthetic insecticides and to Bacillus thuringiensis (Bt) insecticidal proteins expressed in important crops. This study aims to understand patterns of cross-resistance in FAW by investigating the toxicological profile of a Bt-resistant Brazilian strain (Sf_Des) in comparison to a Bt-susceptible strain (Sf_Bra).
Results: Laboratory bioassays with 15 active substances of nine mode of action classes revealed that Sf_Des has a medium level of resistance to deltamethrin and chlorpyrifos.