Frass refers loosely to the more or less solid excreta of insects, and to certain other related matter.
The ash borer, or lilac borer, is a clearwing moth in the family Sesiidae. It is found throughout North America and can be a pest of ash and lilac.
Choristoneura fumiferana, the eastern spruce budworm, is a species of moth of the family Tortricidae native to the eastern United States and Canada. The caterpillars feed on the needles of spruce and fir trees. Eastern spruce budworm populations can experience significant oscillations, with large outbreaks sometimes resulting in wide scale tree mortality. The first recorded outbreaks of the spruce budworm in the United States occurred in about 1807, and since 1909 there have been waves of budworm outbreaks throughout the eastern United States and Canada. In Canada, the major outbreaks occurred in periods circa 1910–20, c. 1940–50, and c. 1970–80, each of which impacted millions of hectares of forest. Longer-term tree-ring studies suggest that spruce budworm outbreaks have been recurring approximately every three decades since the 16th century, and paleoecological studies suggest the spruce budworm has been breaking out in eastern North America for thousands of years.
Dioryctria sylvestrella, the new pine knot-horn or maritime pine borer, is a moth of the family Pyralidae. It is found in Europe, parts of Asia and North Africa. The adult is a small mottled brown and white insect with a wingspan of 28 to 35 mm. The moth flies in a single generation from June to October and is a pest of maritime pine and several other species of pine, on which the caterpillars feed.
Synanthedon myopaeformis is a moth of the family Sesiidae and the order Lepidoptera. In Europe it is known as the red-belted clearwing and in North America as the apple clearwing moth. The larvae create galleries under the bark of fruit trees, especially old trees with damaged trunks. During this process, the larvae cause significant damage to host trees. Particular attention has been paid to the damage they cause to apple trees. Their status as a pest of apple orchards has led to many research projects aimed at controlling populations of the moth. This moth is native to Europe, the Near East and North Africa. Recently, the moth was introduced into North America, being first detected in Canada in 2005. There are several organisms that threaten the larvae, including parasitoids, nematodes, and bacteria.
Synanthedon exitiosa, the peachtree borer, is a species of moth in the family Sesiidae that is native to North America.
Synanthedon scitula, the dogwood borer or pecan borer, is a moth that is a pest of many plants including the dogwood and pecan. It is notorious due to the severity of damage it can cause and its widespread geographical distribution.
Synanthedon sequoiae, the sequoia pitch moth, is a moth of the family Sesiidae. It is found from California north to British Columbia.
Synanthedon pictipes, the lesser peachtree borer, is a moth of the family Sesiidae. It is known from the eastern half of Canada and the United States westward to Minnesota in the north and eastern Texas in the south.
Synanthedon rileyana, the horsenettle borer or Riley's clearwing moth, is a moth of the family Sesiidae. It is found in the United States, including Arkansas, Arizona, Missouri, Oklahoma, North Carolina and Pennsylvania.
Sesia tibialis, the American hornet moth, poplar clearwing borer or cottonwood crown borer, is a moth of the family Sesiidae. It is known from North America, including British Columbia, Colorado, Utah, Michigan, Montana, Washington, California and Arizona.
The term pitch moth refers to certain small moths whose caterpillars feed on pines. The feeding action causes the pine tree to shed its resin, which forms pitch-like masses on and under the tree. There are several species of "pitch moths" and not all are closely related:
Synanthedon formicaeformis, the red-tipped clearwing, is a moth of the family Sesiidae and can be found in all of Europe, the eastern Palearctic realm, and the Near East. The larvae sometimes form pear-shaped galls on willows. It was first described by Eugenius Johann Christoph Esper in 1783.
Synanthedon flaviventris, the sallow clearwing, is a moth of the family Sesiidae. The larvae form pear-shaped galls on sallows.
Synanthedon mesiaeformis is a moth of the family Sesiidae. It is found in France, Spain, Lithuania, Poland, the Czech Republic, most of the Balkan Peninsula, Finland, Russia and Asia Minor. The species prefers solitary trees on meadows, in parks and along streams.
Synanthedon scoliaeformis, the Welsh clearwing, is a moth of the family Sesiidae. It is found from almost all of Europe, east through Russia to Japan.
Synanthedon spuleri is a moth of the family Sesiidae. It is found from France to Turkey and Georgia. In the south, it is found in southern and eastern Europe. In the north, the range extends to the line Paris-southern Germany.
Dendroctonus micans, the great spruce bark beetle, is a species of bark beetle native to the coniferous forests of Europe and Asia. The beetles burrow into the bark of spruce trees and lay eggs which develop into larvae that feed on the woody layers under the bark.
Dendroctonus terebrans, the black turpentine beetle, is a species of bark beetle native to the eastern United States. Its larvae tunnel under the bark of pine trees, weakening and sometimes killing the trees.
Synanthedon rhododendri, also known by its common name rhododendron borer moth, is a species from the genus Synanthedon.
