Journal of Plant Protection Research (2019) 59, 32-40

Philippos N. Mylonas, Costas N. Giannopolitis, Panagiotis G. Efthimiadis, Georgios C. Menexes and Ilias G. Eleftherohorinos (2019)
Dose-response and growth rate variation among glyphosate resistant and susceptible Conyza albida and Conyza bonariensis populations
Journal of Plant Protection Research 59 (1), 32-40
Abstract: Plant responses to glyphosate applied at different doses were examined for one glyphosate resistant (R) and one glyphosate susceptible (S) population of Conyza albida and C. bonarienis. Growth rates and development stages of five R C. albida and three R C. bonarienis populations were also compared with those of their respective S counterparts to investigate the possible impact of the glyphosate resistance trait on their fitness. The GR50 values for C. albida R (3.94-5.22 kg a.i. · ha-1) and S (0.24-0.31 kg a.i. · ha-1) populations were higher than those of C. bonariensis R (0.60-1.51 kg a.i. · ha-1) and S (0.10-0.13 kg a.i. · ha-1). The growth rate (slope b) of one R C. albida population was lower than the respective S and other R populations, while growth rates of most R and S C. bonariensis populations were similar. Some R populations showed inconsistent differences in some development stages when compared to those of the S ones, which cannot be attributed to the glyphosate resistance trait.
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Link to article at publishers website
Database assignments for author(s): Ilias G. Eleftherohorinos

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Erigeron bonariensis (weed)
	Erigeron sumatrensis (weed)