Cottony maple scale is easily recognized by the female's large white egg sac. Peak crawler activity to begin June 27 - 30.
Painted lady butterfly, shown here in late summer getting pollen from gray rabbitbrush.
Feeding by sycamore scale causes distortion of new foliage. At the scale feeding sites, spots form that start with a tiny brown center and yellow halo, and...
Damage from sycamore plant bug on the left, and sycamore scale on the right.
Sycamore plant bugs mature to adults by approximately early July.
Sycamore plant bug nymph with developing wing pads.
Old sycamore anthracnose damage and healthy foliage emerging.
San Jose scale is an armored scale that sucks sap from bark. Currently toward the end of peak crawler stage.
Larvae of European pine shoot moth tunnel into shoots of 2- and 3-needled pines.
The larva of a sequoia pitch moth exposed from within a pitch mass.
Sequoia pitch moth has become a troublesome pest of pines along the Wasatch Front.
Caterpillar of painted lady butterfly feeding on yarrow. This native insect is experiencing a very high population in the Intermountain West in 2019.
European fruit lecanium scale has a very wide host range, but is recognized by the bulbous bodies of females with eggs. Peak crawler activity is happening now.
Grasshopper nymphs are hatching now in large numbers.
European elm scale. Peak crawler activity is to begin June 29 – July 3.