Neonicotinoid Pesticides and Bees - The Food and Environment ...

Figure 5. Comparison of reported effect and no effect levels for imidacloprid in laboratory,
semi-field and field bumble bee dosing studies with maximum reported concentrations in
nectar(1.9 µg/Kg) and pollen (36 µg/Kg) following use as a seed treatment to allow comparison
with exposure to a single dose (study numbers are shown in Table 20). Limited amounts of
pollen are used by workers to construct nests and feed larvae
imidacloprid ug/Kg
100000
10000
1000
100
10
1
0.1
0.01
0 2 4 6 8 10
study
no effect
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effect
field nectar max
field pollen max
Figure 6 Comparison of reported effect and no effect levels for thiamethoxam/clothianidin in
laboratory, semi-field and field bumble bee dosing studies with maximum reported
concentrations in nectar(5.2 µg/Kg) and pollen (51 µg/Kg) following use as a seed treatment to
allow comparison with exposure to a single dose study numbers are shown inTable 21).
Limited amounts of pollen are used by workers to construct nests and feed larvae.
.
thiamethoxam/clothianidn ug/Kg
1000
100
10
1
0 1 2 3 4
study
no effect
effect
field nectar max
field pollen max