| 41. | Bark beetles can form a Ophiostomatales fungi.
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| 42. | Specialist predatory beetles find bark beetles ( their prey ) using the pheromones the bark beetles produce.
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| 43. | The area is vulnerable because drought and an infestation of bark beetles have left millions of dead trees.
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| 44. | A number of trees also fell after being weakened by fire and a previous infestation of bark beetles.
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| 45. | Continuous problems with bark beetle and storms were the negative side effects of mining in the Harz Mountains.
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| 46. | The fungus is carried from tree to tree by a bark beetle, and soon spread across the country.
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| 47. | Bark Beetle Links Page : http : / / www . watertalk . org / wawa / beetle/
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| 48. | The blaze has consumed pine trees ravaged by years of drought and an infestation of tree-killing bark beetles.
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| 49. | After the budworms weaken the stands . . . the bark beetles move in and finish the job.
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| 50. | He also studied other pests, like bark beetles and the mechanisms that parasites use to find their hosts.
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