A) all insects are pests for farmers
B) spiders and beetles are beneficial for farmers
C) farmers want to keep the number of spiders and beetles under control
D) farmers are legally not allowed to use pesticide'
E) aphids are only dangerous if they amount to large numbers
248 -The passage states that ---- .
A) beetle banks are a natural method of pest control
B) beetles can eat 52 million aphids every two years
C) farmers have to keep checking the numbers of aphids in their fields
D) one of the jobs of insect ecologists is to develop pesticides
E) the main purpose of pesticides is to kill beetles and spiders