[From Institute of Science in Society]
Neonicotinoid insecticides used both in sprays and seed dressing may be responsible for the collapse of honeybee colonies. Prof. Joe Cummins
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Neonicotinoid insecticides are harmful to the honeybee
There has been a great deal of concern over the decline of the honeybee across the US, Europe and Australia [1] (The Mystery of Disappearing Honeybees, this series). The United States National Research Council (USNRC) Committee of the Status of Pollinators in North America report [2] focused on the impact of parasites, fungi, bacteria and viruses, but did not pay much attention on the impact of pesticides and genetically modified (GM) crops, which may have lethal or sub-lethal effects on the bee’s behaviour or resistance to infection. There have been strong responses to the report on that account. On the other hand, any suggestion that GM crops and pesticides may be causing the decline of honeybees is met with heated denial from the proponents.
Certainly, honeybees are declining both in areas where GM crops are widely grown, and in other areas where GM crops are released in small test plots. Is there a common thread that links both areas? Yes there is, the universal use of systemic pesticide seed dressing in GM crops and conventional crops; in particular, the widespread application of a relatively new class of systemic insecticides – the neonicotinoids – that are highly toxic to insects including bees at very low concentrations. Systemic pesticide seed dressings protect the newly sprouted seed at a vulnerable time in the plant’s development. Seed dressings include systemic insecticides and fungicides, which often act synergistically in controlling early seedling pests.
Continue reading Requiem for the Honey Bee at Institute of Science in Society
