As beautiful, tall and strong as a tree may appear, it has enemies quite capable of killing it. Some of these enemies are very small insects. One persistent little enemy is the bark beetle. It is one of the worst pests of spruce and pine trees in North America.
Usually these beetles come in swarms, boring through cracks in the bark and eventually boring their way into the sapwood. In a healthy tree, these beetles often become submerged in the resin that oozes out of the hole, and then they die. But in weakened and drought-affected trees, there is not enough resin to trap them. Once the beetles reach the vital sapwood, they lay their eggs in their bored tunnels. When the eggs hatch, the larvae continue to feed in the tree.
If there were no way to stop these persistent little insects, there would eventually be no pine or spruce trees left. God has provided protection for these trees by using another insect known as the checkered beetle which can catch the bark beetles in flight and eat them. Not only do checkered beetles kill the bark beetles, they also go into the tunnels the bark beetles have already made. The checkered beetles lay their eggs alongside those of the bark beetles, and when the larvae hatch, they attack and kill the newly hatched bark beetle larvae.
God has also given another friend to the trees—the braconid wasp. In some unknown way, it locates the bark beetle larvae, even though they might be under an inch of bark. This wasp injects its own eggs into the bark beetle's larvae. The eggs soon hatch and these larvae immediately feed on their hosts, which, of course, kill the bark beetle larvae.
The killer beetles remind us of the enemy Satan, who "as a roaring lion, [walks] about, seeking whom he may devour" (1 Peter 5:88Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour: (1 Peter 5:8)). His attacks are often in some small manner that we may even be aware of, but we say, "That doesn't amount to much; I'm not concerned about it." But what prayerful care we need so that Satan does not get the edge on us.