The latter used an approach based on a naturally occurring toxin from a soil bacterium, Bacillus thuringiensis , which had been used by backyard gardeners for years.
(The latter; used; an approach based on a naturally occurring toxin from a soil bacterium, Bacillus thuringiensis ,) (an approach; based; on a naturally occurring toxin from a soil bacterium, Bacillus thuringiensis) (Bacillus thuringiensis; had been used; by backyard gardeners; T:for years)
The latter an approach Bacillus thuringiensis
used based had been used
an approach based on a naturally occurring toxin from a soil bacterium, Bacillus thuringiensis ,
on a naturally occurring toxin from a soil bacterium, Bacillus thuringiensis
by backyard gardeners T:for years