The larvicidal activity of the bacterium is due to the parasporal crystal that is produced by the bacterium at the time of sporulation.
(The larvicidal activity of the bacterium; is; due to the parasporal crystal) (the parasporal crystal; is produced; by the bacterium at the time of sporulation)
The larvicidal activity of the bacterium the parasporal crystal
is is produced
due to the parasporal crystal
by the bacterium at the time of sporulation