Which statement BEST describes two main ideas in the Passage?
Tamarixia wasps are effective psyllid
destroyers; the best way to reduce pest
populations is by mimicking mating sounds.
Psyllids must be fought in a variety of ways;
interference with mating is one valuable
method for controlling psyllid populations.
Pesticide use is only one way of fighting
psyllids; it may become possible to control
psyllid populations without chemicals or
traps.
Psyllids must be stopped from ruining
oranges; false sound signals are preventing
glassy-winged sharpshooters from infecting
grapes.