I've actually covered that topic; hand pollination is as much about
economics and fruit cultivars as pesticides.
See bottom of article for additional references on the topic.
It's really fascinating (IMHO) how a series of logical economic decisions,
in the absence of larger ecosystem understanding, led to hand pollination.
http://www.wired.com/2014/05/will-we-still-have-fruit-if-bees-die-off/
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