Bees and Pesticides

Plant protection products (pesticides) contain biologically active compounds developed for the purpose of protecting plants.

They include:
Insecticides – control pest insect populations
Herbicides – control weeds
Fungicides – control fungal plant diseases

By controlling the impacts of pests and diseases, pesticides help maximize agricultural productivity and ensure food supply meets the demand of a rapidly growing population.

A reasonable first assumption is that an insecticide might have an effect on an insect such as the honey bee, yet effects vary significantly depending on the nature of the active ingredient and the formulation of the product. For registration and use of pesticide products it is important to demonstrate bee safety or to determine measures to minimize bees’ contact with crop protection products.

A step-by-step approach to bee safety evaluation begins with laboratory studies and progresses, as required, to include semi-field and field studies. Depending upon the outcome of these studies, tailored use recommendations for each product are provided on labels.

Very stringent regulatory safeguards are in place to ensure that crop protection products pose no unacceptable risk to plant or animal life when used according to the label. For example, a new pesticide takes on average almost 10 years to research and develop, typically requiring over 120 separate studies before gaining approval to go on the market. While already very stringent, testing regimes are continually being refined and improved.

The evaluation of pesticides from a bee safety perspective makes use of study protocols and guidelines developed by experts. What really matters in this cascading process is the interaction between a bee and a pesticide in real field situations. In some cases, avoiding or minimizing effects may be as simple as not spraying when the crop is flowering.

Bayer conducts in-depth research into the characteristics of both pesticides and pesticidial biotech crops from an early stage to ensure that they do not negatively impact non-target species like the honey bees, and develops the specific label instructions according to which the products can be safely applied.

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