Variation in the uptake of thiamethoxam, a neonicotinoid pesticide, in the NAM Founder inbreds of maize
Neonicotinoid pesticides have recently come under fire for their negative impacts on pollinators. However, seed treatments of neonicotinoid compounds such as imidacloprid are regularly applied to over 79% of maize grown commercially in the US. Thiamethoxam is one of the least studied of these compounds. In this study, I examined the variation of systemic uptake of thiamethoxam by maize seedlings using a liquid chromatography - mass spectrometry (LC-MS) protocol to observe thiamethoxam concentration in the 26 founder inbred lines of the Nested Association Mapping (NAM) panel, along with the inbreds Mo17 and W22. I observed that the mean differences in concentration 16 days post planting between tropical and temperate lines are significantly different. Additionally, I calculated a minimum value for percent thiamethoxam uptake from seed treatment for 8 inbred genotypes.
Biological sciences honors program; maize; neonicotinoid; thiamethoxam; NAM; uptake in breeds of maize
B.A., Biological Sciences
Bachelor of Arts
dissertation or thesis