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The infestation can be recognized by the light brown caterpillar droppings, which appear in bark cracks. Preference is given to old trees and those weakened by annual tree pruning. The caterpillars pupate within the feeding tunnels, but adult caterpillars have also been found on dried leaves, which indicates that they also leave the feeding ...
Between these two bands is a white space sprinkled with black dots as well as a crescent-shaped black mark near the middle. The overall appearance gives the oak beauty a mottled look. B. strataria ‘s forewings are 17–27 mm (0.67–1.06 in) in diameter, while its wingspan ranges from 40–56 mm (1.6–2.2 in).
The caterpillars are mostly found in oak trees or on the ground under them in late spring and early summer, and do not live on fences, walls, etc. as other caterpillars do. They have very long, white hairs contrasting markedly with shorter hairs. [1] The caterpillars of several other species may be mistaken for the oak processionary. [3]
The caterpillar is a serious pest that attacks more than 30 crops. The larva bores into the trunk or branches about 15–25 cm deep. The tunnel created is empty in the day time, but is filled with caterpillar during the night. It damages the bark of the tree resulting in dieback of the stem. Frass is visible in affected areas. [4]
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Orgyia leucostigma, the white-marked tussock moth, is a moth in the family Erebidae. The species was first described by James Edward Smith in 1797. The caterpillar is very common especially in late summer in eastern North America, extending as far west as Texas , California , and Alberta .
The spiny caterpillars are striking in appearance, with black bodies and a line of eight reddish-orange dots running down the back (aposematic, warning coloration). The prolegs are dark red. The body is covered with short hairs and black spines and white dots. [2] The fully grown mourning cloak caterpillars attain two inches in length. [3]
The caterpillars' coloration, particularly the saddle pattern, is also thought to be disruptive coloration. This means the coloration makes it harder for a predator to distinguish the shape of the camouflaged prey, which explains the continuation of this coloration pattern in larger instars that are too large to be mistaken for bird droppings ...