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Transgenic insect-resistant cotton has been planted in China in a large scale and may have adverse impacts on honeybees. Pollens from the transgenic Cry1Ac+CpTI cotton Zhong-41 and the parental cotton Zhong-23 were collected from the field and their impacts on adult worker bees were assessed. Experimental results showed that Zhong-41 pollen had no acute oral toxic effect on worker bees. No significant...
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