| Trichopoda pennipes | |
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| Trichopoda pennipes | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Tachinidae |
| Subfamily: | Phasiinae |
| Tribe: | Gymnosomatini |
| Genus: | Trichopoda |
| Subgenus: | Galactomyia |
| Species: | T. pennipes |
| Binomial name | |
| Trichopoda pennipes | |
| Synonyms | |
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Trichopoda pennipes is a species of feather-legged fly in the dipteran family Tachinidae. [6] [7]
This species is native to North America (United States, Mexico), [8] Hawaiian Islands and South America [9] and has been introduced into southern Europe (France, Italy and Spain). [10] [11]
This species inhabits grasslands, hedge rows and crops where its key hosts are present. [12]
Trichopoda pennipes can reach a length of 10.5 millimetres (0.41 in), [13] about the size of a large housefly. These medium-sized flies have a velvety, black head. The black or brown thorax shows a few yellow stripes. Eyes are large, brown with yellow between. The color of the slender abdomen varies from bright orange to completely black. Females usually have a dark-tipped abdomen, while males have a dark orange apex. Wings are transparent, smoky with prominent veins. In the females they are evenly dusky, with the posterior margin sub-hyaline. Male flies have a ferrugineous marking on the wings. This fly has huge halteres. Legs are black, with yellow feet. The hind legs bear a prominent feather-like fringe of flattened hairs. [9] [12]
Trichopoda pennipes first appears in the late spring or early summer and feeds on nectar sucked from flowers such as Queen Anne's lace and meadowsweet. It may be seen hovering over other plants in search of suitable bugs on which to lay its eggs, most commonly squash bugs and southern green stinkbugs. The female fly lays several small, pale-coloured, oval eggs on a large nymph or an adult bug. In fact the larvae are parasitoids of several true bugs, particularly squash bugs and leaf-footed bugs in the family Coreidae (including the large-sized Leptoglossus occidentalis ), stinkbugs in the family Pentatomidae and other pentatomorph bugs (Largidae and Scutelleridae species). [11]
When the eggs hatch, the larvae burrow into the bug. If there are several larvae in one host, only one survives. After feeding on the bug's tissues, the cream-coloured larva emerges and falls to the ground where it pupates in a reddish-brown puparium formed from the last larval skin. The bug meanwhile dies. After about two weeks, an adult fly emerges from the pupa. After mating, a female fly may lay several hundred eggs in total. There are up to three generations of the fly each year and the parasitoid overwinters as a second instar larva within the body of the overwintering host. [9] [14]
Trichopoda pennipes is used as a biological control agent for agricultural pests. One of the principal host species for T. pennipes is the southern green stinkbug, Nezara viridula . This is a crop pest that originated in Ethiopia but now has a worldwide distribution and is named for the foul-smelling defensive secretion it exudes from a gland on its thorax. This exudate appears to be fairly effective in preventing predation by birds but is well tolerated by T. pennipes [15] which seems to be highly attracted by an aggregation pheromone produced by the male bugs. This results in a higher proportion of males being parasitised than females. [9]
There seem to be different biotypes across the United States, preying on different hosts in different regions. In northern California, a population of the fly parasitised the bordered plant bug, Largus succinctus , but did not attack the squash bug, Anasa tristis . In an experiment, T. pennipes was collected from squash fields in New York State and released near squash fields in California. The insects targeted the squash bugs and established permanent populations. Their eggs are now found deposited on nearly 50% of the squash bugs in the area but it is unclear how effective this is in controlling the crop pests. [15] On the southern green stink bug, the rate of parasitism can be as high as 93% and up to 80% on the squash bug. However, T. pennipes does not prevent all crop damage as the bugs continue to feed and reproduce after being parasitised, though the reproductive organs begin to atrophy when the parasitoid reaches the second instar stage. Control of the pest is more effective when nymphs are parasitised since half of these die before becoming adults and any that overwinter will die before laying eggs. [9]
The Tachinidae are a large and variable family of true flies within the insect order Diptera, with more than 8,200 known species and many more to be discovered. Over 1,300 species have been described in North America alone. Insects in this family commonly are called tachinid flies or simply tachinids. As far as is known, they all are protelean parasitoids, or occasionally parasites, of arthropods, usually other insects. The family is known from many habitats in all zoogeographical regions and is especially diverse in South America.
The apple maggot, also known as the railroad worm, is a species of fruit fly, and a pest of several types of fruits, especially apples. This species evolved about 150 years ago through a sympatric shift from the native host hawthorn to the domesticated apple species Malus domestica in the northeastern United States. This fly is believed to have been accidentally spread to the western United States from the endemic eastern United States region through contaminated apples at multiple points throughout the 20th century. The apple maggot uses Batesian mimicry as a method of defense, with coloration resembling that of the forelegs and pedipalps of a jumping spider.
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Trichopoda is a genus of tachinid flies, commonly known as the feather-legged flies or hairy-legged flies. They are small, brightly coloured flies that congregate on flowers, feeding on nectar. The halteres are covered with yellow scales and there is a fringe of flattened hairs on the hind legs. The larvae are parasitoids of true bugs in the order Hemiptera, including stink bugs in the family Pentatomidae and leaf-footed bugs and squash bugs in the family Coreidae. They are found in North and South America.
Aphis gossypii is a tiny insect, an aphid ("greenfly") in the superfamily Aphidoidea in the order Hemiptera. It is a true bug and sucks sap from plants. It is a widely distributed pest of a variety of agricultural crops in the families Cucurbitaceae, Rutaceae and Malvaceae. Common names include cotton aphid, melon aphid and melon and cotton aphid.
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Sturmiopsis inferens is a species of fly in the family Tachinidae. It is native to Asia and is a parasitoid of various moth species whose larvae feed inside the stems of sugarcane, rice and other large grasses, including the Gurdaspur borer and the sugarcane shoot borer.
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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.
Mallophora ruficauda is a species of parasitic robber fly in the family Asilidae, endemic to South and Central America. Like other robber flies, M. ruficauda is known for its aggressive behavior and predation upon other insects, especially bees. M. ruficauda mimics a bumblebee to fool predators into thinking it has a painful sting and is not worth eating.
Cuspicona simplex, commonly known as the green potato bug, is a herbivorous species of stink bug native to Australia and introduced to New Zealand. It feeds on nightshades. It is primarily known as a pest of potatoes, tomatoes, and other crops in the nightshade family.
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Mahasena corbetti, the coconut case caterpillar, is a polyphagous species of bagworm. This species is classified as leaf-eating pest caterpillars that produce tough silk out of their bags from dried foliage. Currently, M. corbetti is considered a 'pest of quarantine importance' in multiple countries and is included on the list of dangerous pests in the Malaysian plant quarantine act.
| Authority control databases: National |
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