TY  - JOUR
A1  - Hesselbach, Hannah
A1  - Seeger, Johannes
A1  - Schilcher, Felix
A1  - Ankenbrand, Markus
A1  - Scheiner, Ricarda
T1  - Chronic exposure to the pesticide flupyradifurone can lead to premature onset of foraging in honeybees Apis mellifera
JF  - Journal of Applied Ecology
N2  - 1.Honeybees Apis mellifera and other pollinating insects suffer from pesticides in agricultural landscapes. Flupyradifurone is the active ingredient of a novel pesticide by the name of ‘Sivanto’, introduced by Bayer AG (Crop Science Division, Monheim am Rhein, Germany). It is recommended against sucking insects and marketed as ‘harmless’ to honeybees. Flupyradifurone binds to nicotinergic acetylcholine receptors like neonicotinoids, but it has a different mode of action. So far, little is known on how sublethal flupyradifurone doses affect honeybees.

2. We chronically applied a sublethal and field‐realistic concentration of flupyradifurone to test for long‐term effects on flight behaviour using radio‐frequency identification. We examined haematoxylin/eosin‐stained brains of flupyradifurone‐treated bees to investigate possible changes in brain morphology and brain damage.

3. A field‐realistic flupyradifurone dose of approximately 1.0 μg/bee/day significantly increased mortality. Pesticide‐treated bees initiated foraging earlier than control bees. No morphological damage in the brain was observed.

4. Synthesis and applications. The early onset of foraging induced by a chronical application of flupyradifurone could be disadvantageous for honeybee colonies, reducing the period of in‐hive tasks and life expectancy of individuals. Radio‐frequency identification technology is a valuable tool for studying pesticide effects on lifetime foraging behaviour of insects.
KW  - radiofrequency identification
KW  - flight behaviour
KW  - flupyradifurone
KW  - foraging
KW  - histology
KW  - honeybee
KW  - insecticide
KW  - mortality
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-212769
VL  - 57
IS  - 3
ER  - 
TY  - JOUR
A1  - Hesselbach, Hannah
A1  - Scheiner, Ricarda
T1  - Effects of the novel pesticide flupyradifurone (Sivanto) on honeybee taste and cognition
JF  - Scientific Reports
N2  - Due to intensive agriculture honeybees are threatened by various pesticides. The use of one group of them, the neonicotinoids, was recently restricted by the European Union. These chemicals bind to the nicotinic acetylcholine receptor (nAchR) in the honeybee brain. Recently, Bayer AG released a new pesticide by the name of “Sivanto” against sucking insects. It is assumed to be harmless for honeybees, although its active ingredient, flupyradifurone, binds nAchR similar to the neonicotinoids. We investigated if this pesticide affects the taste for sugar and cognitive performance in honeybee foragers. These bees are directly exposed to the pesticide while foraging for pollen or nectar. Our results demonstrate that flupyradifurone can reduce taste and appetitive learning performance in honeybees foraging for pollen and nectar, although only the highest concentration had significant effects. Most likely, honeybee foragers will not be exposed to these high concentrations. Therefore, the appropriate use of this pesticide is considered safe for honeybees, at least with respect to the behaviors studied here.
KW  - animal behaviour
KW  - chemical ecology
KW  - pesticide
KW  - honeybee
KW  - taste
KW  - cognition
KW  - flupyradifurone
Y1  - 2018
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-175853
VL  - 8
IS  - 4954
ER  -