Dahlbominus fuscipennis | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Hymenoptera |
Family: | Eulophidae |
Genus: | Dahlbominus Hincks, 1945 |
Species: | D. fuscipennis |
Binomial name | |
Dahlbominus fuscipennis (Zettersttedt, 1838) | |
Synonyms [1] | |
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Dahlbominus fuscipennis, the sawfly parasitic wasp, is a species of chalcid wasp from the family Eulophidae which parasitizes the European pine sawfly Neodiprion sertifer , among other hosts. It is the only species in the genus Dahlbominus.
Dahlbominus fuscipennis has a dark coloured, blue tinged head, thorax and body. The head is noticeably wider than the thorax and there is a triangular depression in the centre of the frons. The vertex is narrow and the large eyes are naked. The antennae sit in from of[ clarification needed ] the clypeus and have spindle-like, compressed flagellae, those of the male are branching. The forewing shows shading and the legs are dark. The long, oval abdomen lacks a distinct waist. The females are 1.8-1.9mm in length and the males are 1.4-1.8mm. [2]
Dahlbominus fuscipennis has a number of generations in a year, in eastern Europe it normally has four generations but in cooler summers only three may occur and the last generation in August is usually the most numerous, although the generations overlap. The life cycle of this wasp is completed, under laboratory conditions, in 21–23 days. D. fuscipennis has a number of hosts, mainly sawflies of the family Diprionidae but it can also act as a hyperparasitoid on parasites of the eonymph of Ichneumonidae. [2] In Canada only two full generations and a partial one are completed each summer with the wasps overwintering as fifth instar larvae, prepupae or pupae. [3]
The adult females of D. fuscipennis mate soon after emergence and oviposit their white, oval eggs in groups of 10-50, the mean clutch being 30, through the cocoon and onto the cuticle of the prepupal stage of their host insects. The female first partially parasitizes the host using its sting. [3] An adult female lives for around a week and she may lay up to 100 eggs during her adult life. They normally choose hosts where the prepupae are of the newer generation but will lay on diapausing prepupae of the previous host generation. The sex ratio is usually dominated by females and males may form only one-fifth of the total population. [2] The females are diploid and are produced by fertilised eggs while the males are haploid and are produced from unfertilised eggs. [4]
D. fuscipennis are poor fliers and search for their hosts by flying slowly through forested areas and find their prey cocoons on the surface layer of the soil and within the crowns of young trees with cocoons in the leaf litter having the highest rates of parasitism. The larvae hatch about 5 days after laying and go through five instars, each lasting a day or so, each differing in shape and morphology. The last instar becomes segmented, mainly yellow-brown in colour with a transparent anterior portion. It feeds on the host for four days before entering a prepupal stage which lasts two to three days. In Europe larval development lasts 11 days in the summer months. The pupal stage then lasts between seven and twelve days before the adults emerge. [2] The entire brood of imagos emerge from the host's cocoon through a single emergence hole. [3]
It has been recorded as being a parasitoid of Apanteles rubripes which is a parasitoid of the geometrid moth Semiothisa pumila and of the European spruce sawfly Gilpinia hercyniae . [5] However, it is most associated with outbreaks of Neodiprion certifer and Diprion similis . In some areas this species is an important control on the populations of N. sertifer but in areas where both N. serifer and Neodiprion pini cocoons are numerous then the cocoons of the latter species are preferred. [2] The wasps detect the hosts' prepupae by detecting volatile chemicals which diffuse through the prepupal integument and the cocoon. When the wasp detects these chemicals it drums its antennae, a sign that it has recognised a potential host. [5]
Dahlbominus fuscipennis is native to Europe from France to western Siberia (Novosibirsk), north to Scandinavia and south to the Balkans. It has been introduced to North America in the United States and Canada. [2]
Dahlbominus fuscipennis was original named Eulophus fuscipennis by the Swedish naturalist Johan Wilhelm Zetterstedt in 1838, it was reclassified in a monotypic genus Dalbominus by Hincks in 1945. [1] The name Dahlbominus honours the Swedish entomologist Anders Gustaf Dahlbom.
The Canadian Department of Agriculture started to import Dahlbominus fuscipennis from Europe in 1933 to be propagated in an insectary with several hundred million of the progeny being released since then in an attempt to control invasive European species of sawflies. Between 1935 and 139 the Canadian's exported a large number of the wasps to the United States where they were also released to control invasive sawflies as well as being bred at the Bureau of Entomology and Plant Quarantine, the Maine Forest Service and the New Jersey Department of Agriculture. The first US release was in Maine in 1935 and consisted of 30,000 adult wasps and by the end of 1939 over 200 million wasps had been liberated in Maine. The species is now established in north-eastern North America. [3]
Megachile rotundata, the alfalfa leafcutting bee, is a European bee that has been introduced to various regions around the world. As a solitary bee species, it does not build colonies or store honey, but is a very efficient pollinator of alfalfa, carrots, other vegetables, and some fruits. Because of this, farmers often use M. rotundata as a pollination aid by distributing M. rotundata prepupae around their crops. Each female constructs and provisions her own nest, which is built in old trees or log tunnels. Being a leafcutter bee, these nests are lined with cut leaves. These bees feed on pollen and nectar and display sexual dimorphism. This species has been known to bite and sting, but it poses no overall danger unless it is threatened or harmed, and its sting has been described as half as painful as a honey bee's.
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.
Sawflies are wasp-like insects that are in the suborder Symphyta within the order Hymenoptera, alongside ants, bees, and wasps. The common name comes from the saw-like appearance of the ovipositor, which the females use to cut into the plants where they lay their eggs. The name is associated especially with the Tenthredinoidea, by far the largest superfamily in the suborder, with about 7,000 known species; in the entire suborder, there are 8,000 described species in more than 800 genera. Symphyta is paraphyletic, consisting of several basal groups within the order Hymenoptera, each one rooted inside the previous group, ending with the Apocrita which are not sawflies.
Hyalophora cecropia, the cecropia moth, is North America's largest native moth. It is a member of the family Saturniidae, or giant silk moths. Females have been documented with a wingspan of five to seven inches or more. These moths can be found all across North America as far west as Washington and north into the majority of Canadian provinces. Cecropia moth larvae are most commonly found on maple trees, but they have also been found on cherry and birch trees among many others. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae.
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.
Chloridea virescens, commonly known as the tobacco budworm, is a moth of the family Noctuidae found throughout the eastern and southwestern United States along with parts of Central America and South America.
Zeiraphera canadensis, the spruce bud moth, is a moth of the family Tortricidae. It is a small brown moth mainly found in North America, specifically New Brunswick, Quebec, and the north-eastern United States. The adult moth flutters quickly, and stays low among trees during the day and higher above tree cover after sunset. The spruce bud moth relies primarily on the white spruce tree as a host plant. Both male and female spruce bud moths mate multiply, however males have the ability to secrete accessory gland proteins that prevent female re-mating. The moth is univoltine, meaning only one generation hatches per year, and its eggs overwinter from July to May. The species Z. ratzeburgiana is very similar to Z. canadensis and can only be distinguished by the presence of an anal comb in Z. canadensis.
Dinocampus coccinellae is a braconid wasp parasite of coccinellid beetles, including the spotted lady beetle, Coleomegilla maculata. D. coccinellae has been described as turning its ladybird host into a temporary "zombie" guarding the wasp cocoon. About 25% of Coleomegilla maculata recover after the cocoon they are guarding matures, although the proportion of other ladybird species which recover is much lower.
The redheaded pine sawfly, European pine sawfly or Neodiprion sertifer, is a sawfly species in the genus Neodiprion. Native to Europe, it was accidentally introduced to North America in 1925, where it has established itself as a commercial pest.
Neodiprion abietis, commonly known as the balsam fir sawfly, is a species of insect in the family Diprionidae. It is found in North America from Canada to northern Mexico and is phytophagous, feeding on the needles of coniferous trees.
Tamarixia radiata, the Asian citrus psyllid parasitoid, is an hymenopteran wasp from the family Eulophidae which was discovered in the 1920s in the area of northwestern India (Punjab), now Pakistan. It is a parasitoid of the Asian citrus psyllid, an economically important pest of citrus crops around the world and a vector for Citrus greening disease.
The common pine sawfly, Diprion pini, is a sawfly species in the family Diprionidae. It is a serious pest of economic forestry, capable of defoliating large areas of pine forest. It occurs throughout Europe and Russia.
Hoplocampa testudinea, the apple sawfly or European apple sawfly, is a species of sawfly in the family Tenthredinidae. It is native to Europe but has been accidentally introduced into North America where it became invasive. The larvae feed inside the developing fruits of the apple tree.
Lathrolestes ensator is a species of wasp in the family Ichneumonidae. it is a parasitoid of the apple sawfly Hoplocampa testudinea. Both insects are native to Europe, but the sawfly has been accidentally introduced into North America where it has become established. The larvae of the sawfly tunnel into developing apple fruitlets which later fall to the ground, where the larvae continue their development. The wasp parasitises the larvae and has been released in North America as part of a biological control programme for the sawfly.
Diprion similis is a species of sawfly in the family Diprionidae. It is native to central and northern Europe and Asia but was accidentally introduced into North America where it has become invasive. The larvae feed on the needles of pine trees, especially those of the white pine. In North America it is known as the introduced pine sawfly or the imported pine sawfly. It is also known as the white pine sawfly because of its preference for feeding on the white pine, but this name is confusing because another sawfly, Neodiprion pinetum, whose larvae also feed on this tree, is itself known as the "white pine sawfly".
Neodiprion pinetum is a species of sawfly in the family Diprionidae. It is commonly known as the white pine sawfly, a name sometimes also applied to Diprion similis, because the larvae of both species feed on the needles of the white pine.
Neodiprion lecontei is a species of sawfly in the family Diprionidae native to eastern North America, commonly known as the red-headed pine sawfly or Leconte's sawfly. The larvae feed on the foliage of many species of native and imported pines. This species was named after John Lawrence LeConte, an American entomologist of the 19th century.
Melittobia australica is a species of chalcid wasp from the family Eulophidae which is a gregarious ecto-parasitoid of acuealate Hymenoptera.
Euura proxima is a species of sawfly belonging to the family Tenthredinidae. The larvae feed on the leaves of willows, creating galls. It was described by Jean Guillaume Audinet-Serville in 1823. The species was placed in the genus Euura in 2014 and was previously known as Nematus proximus and Pontania proxima.
Exorista mella is a tachinid fly of the genus Ezorista within the family Tachinidae of the order Diptera. They are typically found in the United States and Canada. Within the U.S in the state of Arizona they have been found in both mountainous and agricultural regions. E. mella is a parasitoid fly, a polyphagous generalist which parasitizes a variety of hosts.