Keith s delaplane daniel f mayer crop Pollinat(BookZZ org)

... bees in the US The expected loss estimate of Southwick and Southwick assumes 50% loss of honey bees in northern US states due to parasites and disease, 100% loss of European honey bees in southern... bees and bumble bees make up the majority of insect visitors to these crops In an analysis of 13 of the major field crops and two glasshouse crops, it was estimated that the annual value of insect... the flowers of a different plant or different variety Many crops require or benefit from cross-pollination Self-fertile plants can develop seeds and fruit when pollen is transferred from anthers