Because one of the larval stages is a heavy feeder on grasshopper eggs, knowledge of grasshoppers and their life cycles can be helpful.
(one of the larval stages; is; a heavy feeder on grasshopper eggs) (knowledge of grasshoppers and their life cycles; can be; helpful)
one of the larval stages knowledge of grasshoppers and their life cycles
is can be
a heavy feeder on grasshopper eggs
helpful