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Figure 3


Effect of 0.1–0.5% oxalic acid dihydrate in aqueous and in 50% sucrose solution on bees in submersion tests (n = 5 experimental series) at the end of July 2007. Different letters indicate statistically significant differences. As the concentration of OA increased above 0.2%, the sucrose solution became increasingly more toxic to bees than the aqueous solution (t-test, P < 0.05).

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