51.   They live well into their teens and have few natural enemies.

52.   They were natural enemies from the start.

53.   Those who did conceded fire was their biggest natural enemy.

54.   To avoid killing beneficial insects such as predatory wasps and ladybugs, which are natural enemies of aphids, nontoxic or low-toxic treatments are best.

55.   TVs and computers are not natural enemies once you get past the vastly different ways that they are used.

56.   With its protruding snout and stunted wings, the boll weevil looks part beetle, part aardvark, and has no natural enemies in the American South.

57.   Zvereva says their work highlights the importance of long-term studies of the entire range of natural enemies of animals to pin down the effects of pollution on plants.

58.   Yet the story of the modern apple, which has become utterly dependent on us to keep its natural enemies at bay, suggests that domestication can be overdone.

59.   Apart from threats by man, coral reefs also have a natural enemy.

60.   Bush also is facing heat from his natural enemies on the left.