Effects of the cultivation of genetically modified Bt crops on nontarget soil organisms - Microbial Ecology in Sustainable Agroecosystems - page 205

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

Natural arthropod
communities

Various Field Cultivation of Bt maize

(Event 176) and
non- Bt maize with
chemical insecticide
(Karate Xpress),
biopesticide (Delfin),
or no treatment

Cry1Ab Lower abundance of

adult Lepidoptera,
Lonchopteridae,
Mycetophilidae,
Syrphidae, and
Ceraphronidae in Bt
maize plots but few
effects on most other
arthropods

Candolfi et
al. (2004)

Monarch butterfly
larvae

Danaus
plexippus

Laboratory
Field

Natural deposits of Bt
and non- Bt maize
pollen on milkweed

Cry1Ab ~24% fewer larvae

reached the adult
stage when exposed
to Bt pollen; 0.6%
mortality after
long-term exposure

Dively et al.
(2004)

Monarch butterfly
larvae

Danaus
plexippus

Laboratory
Cage study

Bt and non- Bt maize
pollen deposited on
milkweed

Cry1Ab Additive effects of Bt

anthers and pollen led
to behavioral and
feeding changes in
the lab
Larvae exposed to Bt
anthers and pollen
took longer to
develop and pupae
weighed less in a cage
study

Anderson et
al. (2005)

(continued)