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Effect of irs knockdown on age of first foraging in low pollen hoarding strain bees in (a) colony 1 and (b) colony 2. There was no effect of treatment in either colony 1 (Kaplan–Meier: χ2 = 2.0, p = 0.37; n = 242) or colony 2 (Kaplan–Meier: χ2 = 7.1, p = 0.028, n = 230).
