Ugly-nest caterpillar moth | |
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Ugly-nest caterpillar tent | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Lepidoptera |
Family: | Tortricidae |
Genus: | Archips |
Species: | A. cerasivorana |
Binomial name | |
Archips cerasivorana | |
Synonyms | |
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Archips cerasivorana, the ugly-nest caterpillar moth, is a species of moth of the family Tortricidae. The caterpillars of this species are known to create nests by tying the leaves of their host plant together. Caterpillars are seen to follow one another in trails, a behavior prompted by the release of signaling pheromones from their spinnerets. [2]
A. cerasivorana is found throughout North America, as far north as Alaska and as far south as North Carolina. [3] The wingspan is 20–25 mm. Adults can be found from July to September in one generation per year.
A. cerasivorana is commonly referred to as the ugly-nest caterpillar moth. It is a species of moth in the family Tortricidae. Related species include Archips fervidana . Archips rileyana is very similar to A. cerasivorana, both in appearance and larval habits. At first, A. rileyana was considered a subspecies of A. cerasivorana, but Obraztsov (1959) demonstrated that both adults and larvae of the two species can be separated. [4] [5]
A. cerasivorana is characterized by an uncus with parallel sides in the male, a large blunt signum in the female, and smaller, sometimes body-colored pinacula on the larval abdomen. In contrast, A. rileyana is characterized by a spatulate uncus in the male, a moderate pointed signum in the female, and very large, conspicuous, black pinacula on the larval abdomen. [6]
The larvae feed on the leaves of Prunus virginiana , Prunus serotina , Crataegus , Rosa , Malus , Cotoneaster , Betula and Populus species.
It is found in various parts of North America, from Alaska to Canada and United States. Within the United States, it can be found towards the east in New England, the south in North Carolina, and the west in California, Utah, and Colorado. [3] [7]
The larvae are distinct by their coloration. Early instars are yellowish-green with black legs, head, prothoracic shield, and anal shield. The later instars are bright orange with the same contrasting dark sclerotization and with sparse moderately long pale setae. [7] Last instar larvae are 19–26 mm in length with a yellow to dark yellowish-green abdomen. The head, prothoracic shield, thoracic legs, and anal shield are dark brown to black. An anal comb is absent. [6] Larvae of Archips rileyana are very similar to those of A. cerasivorana.
In adult males, the forewing length ranges from 7.5-9.5 mm; and 9.0-12.0 mm in females. [6] The adults are easily recognized by the orange forewing with many silvery bars. Forewing color varies from bright orange to yellow, often with faint purplish markings. Males have a forewing costal fold. There are distinct brown squared blotches along the costa in the postmedian and median area, along with variable smaller brown markings through the middle of the wing in the antemedian and median areas. The hindwings and most of the body is also orange. The wingspan is 20–25 mm. The hindwings are yellow with orange shading.
There is one generation every year. Females lay masses of 25-200 eggs at the base of shoots, often near the ground. Females mainly prefer chokecherry. Eggs overwinter and first instar larvae hatch in May. Adults can be found from early July to mid-September. [8] Unlike many tortricids, the larvae are social, and feeding occurs in silken nests on terminals of the host plants. The webs are made around the terminal shoots of the host, sometimes enveloping entire plants. Pupation occurs inside individual cells inside the shelter. Adults are not very active during the day and can be found resting on foliage. At night, the adults are known to be attracted to lights. [9] A typical nest may contain 30-200 larvae and reach up to 30 inches in diameter. The nest is expanded when the colony needs additional food and feeding always occurs under the protection of the nest. Early stages skeletonize leaves while later stages consume entire leaves. Pupation occurs in chambers constructed in the nest from frass and silk. [6] Before emerging, the pupae will force their way to the outer surface of the silk nest where the adult moth ecloses. [10]
From the first instar, the caterpillars will aggregate and build large tent structures. These caterpillars are one of the few in the family Tortricidae that exhibit social behavior.
They make these tents by spinning silk threads between leaves and branches, which draws them into a compact nest. Each strand of silk is stretched slightly before it is attached to a leaf so that a tiny force (from axial retraction) will pull the leaf slightly towards the nest. When many strands of silk are spun to the surrounding leaves, the net forces will eventually drive all the leaves into the characteristic tent shape. [10] [11] The caterpillars usually stay within boundaries defined by the silk that envelops their shelter. They occasionally venture out of the nest, traveling only short distances to draw in new leaves. In most cases, the colony finds a sufficient number of leaves in its contiguous patch to complete larval development.
If all of the leaves within a tent are consumed before the caterpillars are ready to pupate, the caterpillars will be forced to leave their nest and find a new nesting location. During these migrations, the caterpillars will depart individually or in small groups, leaving small silken trails laced with pheromones to guide the next caterpillar. [2]
Trail-following has been hypothesized as a product of both chemical and physical input. [2]
Research has shown that trail-following behavior in a caterpillar originates, in part, from the following of pheromones left by other caterpillars. Each caterpillar secrets marker pheromones secreted from glands by the spinnerets, no other regions of the body have been shown to secrete pheromones. Experiments have shown that caterpillars are capable of following trails prepared with gland extracts, but such trails were markedly less effective than originally-intact control trails. Also, caterpillars display a preference for silk-like trails. When presented with a variety of pheromone-trail mediums, from nonporous steel, to cotton, to the original trail, experimental caterpillars preferred the original silk trail. [2]
Ugly-nest caterpillars cause little permanent damage to plants besides branch deformity. They have little to no economic impact. The largest problem they pose is cosmetic. The caterpillars will sometimes build their unsightly nests in orchards and gardens. The caterpillars will web together foliage which they then feed, defecate, and pupate in. The nests can be easily located by visual inspection; they are found primarily on chokecherry, but can also be found on other hardwoods and shrubs. To monitor an orchard for presence of caterpillars, one should look for the development of untidy nests of webbing, twigs, and leaves. [12] [13]
The best means for removal is to prune and destroy webbed nests. [12]
The caterpillars can also be chemically removed through use of pesticides. Pesticides like the bacteria Bacillus thuringiensis can be sprayed to control young larvae. Larger populations of older larvae can be controlled with a residual insecticide, but damage is rarely sufficient to warrant treatment that may endanger the rest of the local environment. Biorational pesticides like insecticidal soap, pyrethins, spinosad, and tebufenozide can also be used. [14]
The luna moth, also called the American moon moth, is a Nearctic moth in the family Saturniidae, subfamily Saturniinae, a group commonly named the giant silk moths.
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The eastern tent caterpillar is a species of moth in the family Lasiocampidae, the tent caterpillars or lappet moths. It is univoltine, producing one generation per year. It is a tent caterpillar, a social species that forms communal nests in the branches of trees. It is sometimes confused with the spongy moth and the fall webworm, and may be erroneously referred to as a bagworm, which is the common name applied to unrelated caterpillars in the family Psychidae. The moths oviposit almost exclusively on trees in the plant family Rosaceae, particularly cherry (Prunus) and apple (Malus). The caterpillars are hairy with areas of blue, white, black and orange. The blue and white colors are structural colors created by the selective filtering of light by microtubules that arise on the ball cuticle.
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Acronicta rumicis, the knot grass moth, is a species of moth which is part of the genus Acronicta and family Noctuidae. It was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae. It is found in the Palearctic region. A. rumicis lives and feeds on plants located in wide-open areas. At its larval stage, as a caterpillar, it causes such a large impact as a crop pest that it has received much attention and research. A. rumicis feeds on maize, strawberries and other herbaceous plants.
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Ochrogaster lunifer, the bag-shelter moth or processionary caterpillar, is a member of the family Notodontidae. The species was first described by Gottlieb August Wilhelm Herrich-Schäffer in 1855. Both the larval and adult forms have hairs that cause irritation of the skin (urticaria). The adult moth has a woolly appearance and its wings can grow to be about 5.5 cm across. The larvae feed on Grevillea striata at night and reside in brown silken bag nest during the day.
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Archips semiferanus is a species of moth in the family Tortricidae, and one of several species of moth commonly known as oak leafroller or oak leaf roller. The larvae feed on the leaves of oak trees in the eastern United States and southeastern Canada and are a major defoliator of oak trees, which can lead to tree mortality. In Pennsylvania in the late 1960s and early 1970s, oak leafrollers defoliated over 1,045,000 acres (423,000 ha).
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Cryptophlebia ombrodelta, the litchi fruit moth or macadamia nut borer, is a moth of the family Tortricidae. The species was first described by Oswald Bertram Lower in 1898. It is native to India, Sri Lanka, Nepal, Indonesia, China, Taiwan, Vietnam, Thailand, western Malaysia, New Guinea, the Philippines, Japan, Guam, the Caroline Islands, Australia and has been introduced to Hawaii.
Eucheira socialis, commonly known as the Madrone butterfly is a lepidopteran that belongs to the family Pieridae. It was first described by John O. Westwood in 1834. Locally known as Mariposa del madroño or tzauhquiocuilin, it is endemic to the highlands of Mexico, and exclusively relies on the Madrone as a host-plant. The species is of considerable interest to lepidopterists due to gregarious nest-building in the larval stages, and heavily male-biased sex ratio. It takes an entire year for this adult butterfly to develop from an egg. The eggs are laid in the month of June and the adults emerge the following May–June. The adults have a black and white pattern on their wings, and the males are generally much smaller and paler than the females. The larvae do not undergo diapause and continue to feed and grow communally in the coldest months of the year. There are two subspecies of E. socialis, named E. socialis socialis and E. socialis westwoodi.
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