Douglas-fir Tussock Moth Outbreak

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Recently browned trees to the south of Taos, N.M., are the result of an outbreak of Douglas-fir tussock moths, which are currently in their larval (caterpillar) stage. Proceed with caution when around them.

An allergic reaction called tussockosis can occur from direct contact with the hairs of the caterpillars, which has thousands of them. And those hairs can go airborne, unseen to the eye. Hairs are also found on female moths, egg masses, and cocoons.

Tussockosis severity may vary between individuals, by the amount of exposure, and the level of the outbreak.

Symptoms may include itchiness, skin rashes, skin irritation, watery eyes, runny nose, and sneezing. More severe reactions, though less common, include blisters, coughing, shortness of breath, wheezing, and chest tightness.

If contact does occur, immediately wash the area of exposure. If symptoms become severe or problematic, immediately seek medical care.

Read more about the outbreak.