The most vulnerable stage of the scale insect's life cycle is the crawler stage, an active unarmored stage that occurs after egg hatch.
(The most vulnerable stage of the scale insect's life cycle; is; the crawler stage) (an active unarmored stage; occurs; T:after egg hatch)
The most vulnerable stage of the scale insect's life cycle an active unarmored stage
is occurs
the crawler stage
T:after egg hatch