1.   Concern is expressed that agricultural methods and the widespread introductions of honey bees are reducing the populations of bumble bees.

2.   Once poison has temporarily reduced rat populations to almost zero, predation by barn owls can slow the recovery.

3.   And they perform a lot of helpful services to the flora of San Juan Island, since they reduce the population of aphids, caterpillars and other insect pests.

4.   As a result, Rhode Island officials plan no active effort to reduce the population.

5.   At first, it tried to reduce the population by expelling those who worked outside the northern suburbs and by levying high taxes.

6.   A few years ago, an Asian disease reduced populations of bighorn sheep in the park and throughout the West.

7.   Hard winters do not reduce turkey populations as much as cold, wet springs.

8.   Greenhouse tests have shown that this transgenic potato can reduce populations of the peach-potato aphid by half.

9.   In recent years, Mahoney said, cold weather and scrub jays, which are fond of feeding on quail chicks, have reduced the population.

10.   It reduces the population of mosquitoes in your area over time.