What does it mean that target species don't get wiped out

[Paul Cherubini]

Pat Foley wrote:

> The risk to some non-target species of Bt may be substantial, well worth
> investigating.

That is why I ask everyone this question: After decades of Bt use in
forests and cropland, have there been any cases (published in Journals)
of non-target lep populations being wiped out or seriously impacted for
a long time period following the spraying? 

> (there are thousands of
> vulnerable lepidopteran species within range of corn and other engineered
> plants, not just the Monarch).

Ditto in the case of spraying forests for gypsy moths. There has thus
been ample time over the past decades to document the devastating long
term impacts of Bt use in forests (if there have been any such cases) on
non-target leps. So again, have there been any cases (published in
Journals) of non-target lep populations being wiped out or seriously
impacted for a long time period following the spraying?

PS. I drive a '89 Toyota Corolla with 214,000 miles and a '92 Toyota
pickup with 347,000 miles. About half those miles were butterfly
expedition miles of the type Mark Walker does all the time, except my
interests have been focused on monarchs.

Paul Cherubini, Placerville, California