|DOI / URL
||The impact of an insecticide on insect flower visitation and pollination in an agricultural landscape
||Brittain, C.A.; Bommarco, R.; Vighi, M.; Barmaz, S.; Settele, J.; Potts, S.G.;
|Journal / Serie
||Agricultural and Forest Entomology
||Agro-chemical; bees; ecosystem service; fenitrothion; pesticide; pollinator
- 1 Pesticides
are considered a threat to pollinators but little is known about the
potential impacts of their widespread use on pollinators. Less still is
known about the impacts on pollination, comprising the ecosystem service
that pollinators provide to wildflowers and crops.
- 2 The present study measured flower visitation and pollination in an agricultural landscape, by placing potted flowering plants (Petunia
sp.) in vine fields sprayed with a highly toxic insecticide
(fenitrothion). During two sampling rounds, insect visitors to the
petunias were observed and measures of pollination were recorded by
counting and weighing seeds.
- 3 In
the earlier sampling round, a lower species richness of insect visitors
was observed in fields that had received an early application of
insecticide. No negative impacts were found from later applications. The
results obtained suggest a greater potential harm to insect pollinators
and flower visitation as a result of insecticide application early in
- 4 No
reduction in pollination was found in fields that received an early
insecticide application. Pollination was greater with two insecticide
applications between sampling rounds rather than one application.
- 5 In
the present study system, insecticide application had a negative effect
on pollinators but a possible positive effect on pollination services.
In some cases, it may be that actions for conserving biodiversity will
not benefit pollination services to all plants.
|Brittain, C.A., Bommarco, R., Vighi, M., Barmaz, S., Settele, J., Potts, S.G. (2010):
The impact of an insecticide on insect flower visitation and pollination in an agricultural landscape
Agric. For. Entomol. 12 (3), 259 - 266