It represents a serious threat to agriculture because bees are pollination agents for the majority of crops.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/bees%E2%80%99-decline-linked-pesticides
[2] http://admin.indiaenvironmentportal.org.in/category/author/michael-mccarthy
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/tribune-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pesticides-and-toxins
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bees
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/honey-bees
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/insecticide
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/honey