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  • Title: Resistance to HPPD-inhibiting herbicides in a population of waterhemp (Amaranthus tuberculatus) from Illinois, United States.
    Author: Hausman NE, Singh S, Tranel PJ, Riechers DE, Kaundun SS, Polge ND, Thomas DA, Hager AG.
    Journal: Pest Manag Sci; 2011 Mar; 67(3):258-61. PubMed ID: 21308951.
    Abstract:
    BACKGROUND: A population of waterhemp in a seed maize production field in central Illinois, United States, was not adequately controlled after post-emergence applications of herbicides that inhibit 4-hydroxyphenylpyruvate dioxygenase (HPPD). RESULTS: Progeny from the field population survived following treatment with mesotrione, tembotrione or topramezone applied to the foliage either alone or in combination with atrazine in greenhouse experiments. Dose-response experiments indicated that the level of resistance to the HPPD inhibitor mesotrione is at least tenfold relative to sensitive biotypes. CONCLUSION: These studies confirm that waterhemp has evolved resistance to HPPD-inhibiting herbicides.
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