Forest Insect Defoliators
FIELD GUIDE TO INSECTS AND DISEASES OF ARIZONA AND NEW MEXICO FORESTS
New Mexico Fir Looper
Galenara consimilus (Heinrich)

Hosts: Douglas-fir and white fir

Figure 36. Larva of New Mexico fir looper.Symptoms/Signs: Larvae feed on the foliage often stripping its host of needles. The immature stages of this insect have not been described. The forewings of the adults are light gray overlain with grayish-brown and brownish-black scales.

Biology: Little is known about the biology of this insect. Outbreaks of this occasional pest occurred in 1924, 1928, 1951, 1958, 1974, 1977, and 2002 in New Mexico, the only state in which this insect is known to occur.

Effects: This insect can cause heavy defoliation of Douglas-fir and white fir resulting in growth loss and top-kill. Several years of heavy defoliation can result in high levels of tree mortality.

References: 23

Figure 37. Damage of fir caused by New Mexico fir looper. Figure 38. Near view of damage caused by New Mexico fir looper.