Pollinator problems

Pollinator problems

In a previous woodlands.co.uk blog, Professor  Dave Goulson (University of Sussex) has written about the problems that bees and bumblebees face.  Recently, he joined with Clipper teas (who produce organic tea products) to again emphasise the problems that bees and other pollinators face, and to explain how our lives would be affected if they were to be lost.  Bee, bumblebee and other pollinator populations are at risk or in decline.  Professor Goulson estimates that there are some 6,000 different species of pollinating insects in the U.K alone, but they face risks as a result of

Hoverfly foraging

Whilst it is true that insecticides such as neonicotinoids are directly toxic to bees and bumblebees, many other compounds used as herbicides and fungicides are also harmful to these insects.  Obviously herbicides get rid of weeds, but weeds or wild flowers are a food source for these pollinators.  Pesticides can have what are termed  sub-lethal effects’, so that the learning ability of the insects is reduced.  Bees and bumblebees can learn which flowers are best as food sources, they can navigate to and from their nests / hives through open countryside.  Also these compounds can affect their resistance to disease, and their fertility / reproduction.

It is a concern that that bees’ honey stores may contain a cocktail of several pesticides that the bees have encountered during their foraging.  In collecting pollen and nectar, a single bee may visit / pollinate four thousands flowers in a day. Not only are many thousands of  wild flowers species dependent on bees for pollination but some three quarters of our food crops also need bees and other insects.  Without them, the range and availability fo fruit and vegetables in our supermarkets would be substantially reduced.

Whilst going organic and reducing reliance on the many forms of pesticide agriculturally is great help to pollinators, there is also good news in that small growers and even domestic gardeners can have a positive impact on the numbers of bees and others pollinators, such as :

  • Planting a range bee-friendly plants in their gardens
  • Creating a wild flower area in the garden or
  • Allowing the lawn to grow up to form a small meadow like area
  • Reducing the use of all pesticides - insecticides, herbicides, fungicides etc.

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