Bark beetles in lodgepole pine used to be more selective, leaving the younger and healthier trees alone.

海滩松上的树皮甲虫会有选择性地寄居在松树上，避开年轻健康的松树。

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Or it could be caused by the higher temperatures that now prevail in northern areas, allowing beetles to breed more often in summer and survive in greater Numbers through the winter.

或者，可能是因目前北部普遍存在的高温，使甲虫常常在夏天繁殖和在冬季幸存的数量都更多了。

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Meanwhile, pests such as tree-killing beetles and crop-killing fungi will both increase their range and breed more rapidly.

同时，专杀树林的甲壳虫和专杀作物的真菌都会扩大活动范围，也会更加迅速繁殖。

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Organic farms had more beetles and butterflies, but conventional farms had more species of beetle.

ECONOMIST: What the birds and bees say

Of the trees that haven't been destroyed, he said 85% are "heavily infested by one or more long-horned beetles" that bore into the wood of adult boswellia and eat them from the inside.

WSJ: A Shift for the Magi? Frankincense Shortage