News

Insecticides: will bumblebees soon die out in this country?


The number of bumblebees is falling dramatically. These act on the nerve cells of the bumblebees and ensure that they lay fewer eggs. In addition, the animals become addicted to the substance.

Plant protection products make you sterile
An experiment has now shown that neonicotinoids reduce the number of egg-laying bumblebee queens by a quarter.

Bumblebee collapse
This can lead to the collapse of the bumblebee populations. British researchers in Nature Ecology & Evolution estimated the risk of bumblebees becoming extinct at 28%. The basis was a model calculation.

Experiment with thiamethoxam
The scientists overwintered 319 fertilized queen bumblebees, changing the length of hibernation, parasite infestation, and thirdly added thiamethoxam, a neonicotinoid.

Less eggs
A short hibernation reduced the likelihood of a queen laying eggs, as well as parasites.

Ten weeks of observation
The researchers now fed the queens with the syrup containing thiamethoxam and observed them for ten weeks.

The devastating result
The result was devastating: without the poison, 26% more queens reproduced.

Early egg laying
The queens also laid their eggs earlier. This is a typical sign of stress.

Extinction is possible
Gemma Baron worked on the study and said: "If queens do not produce eggs and produce new races, bumblebees may die out."

Connection with neocotinoids
Dirk Süßenbach from the Federal Environment Agency considers a connection between pesticides and bumblebee deaths to be obvious: "It is striking that the decline in bee populations and other insects in different regions roughly coincides with the beginning of the use of neonicotinoids."

Insect death
It's not just the bumblebees that are dying out. Bee death and a general decline in insects in Germany are also rampant up to 80%. Insect mortality, in turn, leads to bird extinction because the birds can no longer find food.

Who's to blame?
Not only the neocortinoids are to blame, but also the massive destruction of living space.

Which habitats are being destroyed?
Urban gardeners and farmers are destroying green areas, the wild flowers of which provide food to the bumblebees like bees. they cannot feed in gravel gardens. Landowners cement fallow land to build apartments - or parking lots or shopping centers.

Collapse of livelihoods
If bumblebees and bees die out, the foundations of life are destroyed. These animals pollinate flowering plants. Without bumblebees and bees, there are no apples or pears.

What can you do?
Create “wild corners” in your garden or on the balcony with native flowering plants or at least plants that the bumblebees can use, for example wild carrot, borage, thyme, lavender and summer lilac.

Urban gardening
Urban gardening is an emergency aid for bumblebees. Get bumblebee food in town.
You can get “seed bombs” that contain native blends of flowers and leave them on the side of the road, in flower boxes or on the side of the road.

Green roofs
All kinds of areas are ideal for planting wildflowers: flat roofs as well as house facades. An old washing machine can be converted into a bed; an old wardrobe gets a second life as a bumblebee rescue station.

Which plants are suitable for a bumblebee bed?
The following are suitable for bees and bumblebees: columbine; Broom heather such as purple loosestrife, Dost such as knapweed and bluebells, daisies, but also carnation, ragwort or Günsel, as well as heather, autumn timeless and locust apple, various types of clover, mullein, linseed, mint in all flowering varieties, yarrow, plus sloe, cowslip and Summer lilacs such as soapwort and gorse; Thyme, willow, willow-herb and lemon balm also provide the animals with the best food. Dr. Utz Anhalt

Author and source information


Video: BUMBLEBEES - The Secret World of Bees (June 2021).