Effects of the cultivation of genetically modified Bt crops on nontarget soil organisms - Microbial Ecology in Sustainable Agroecosystems - page 204

Table 8.9 Summary of the Effects of the Cultivation of Bt Crops or Amendment with Bt Protein on Selected Nontarget Lepidopteran and Aquatic
Insect Larvae (continued)

Species/
classification

Bt crop plant/
experimental variable Organism(s) Study location Protein Effect on organism(s) Source

Monarch butterfly
larvae

Danaus
plexippus

Field Survival and growth of

larvae after exposure
to pollen from Bt
maize (Events Bt 11,
Bt 176, and MON810)
or to an insecticide

Cry1Ab Negative effects of Bt

176 on larvae but
negligible effects of Bt
11 and MON810

Stanley-Horn
et al. (2001)

Monarch butterfly
larvae

Danaus
plexippus

Cage and flight
chambers

Oviposition behavior
of monarch on
milkweed plants
dusted with Bt or
non- Bt maize pollen,
gravel dust, or
undusted

Cry1Ab No difference in

oviposition behavior
between treatments

Tschenn et al.
(2001)

Black swallowtail
butterfly larvae

Papilio
polyxenes

Field Bt maize, Event 176 Cry1Ab Significant reduction in

growth rates of black
swallowtail larvae

Zangerl et al.
(2001)

Monarch butterfly
larvae

Danaus
plexippus

Laboratory
Field

Larvae fed Bt maize
anthers
Measured anther
density on milkweed
in the field and
evaluated effects on
monarch larvae

Cry1Ab Negative effects on

larvae that increased
with Bt anther density
in the lab
No negative effect in
the field

Anderson et
al. (2004)

(continued)