Parasitoid wasp

Short description: Group of wasps

Megarhyssa macrurus (Ichneumonidae), a parasitoid, ovipositing into its host through the wood of a tree. The body of a female is c. 2 inches (50 mm) long, with an ovipositor c. 4 inches (100 mm) long.

File:Neoneurus vesculus ovipositing in workers of the ant Formica cunicularia.ogvParasitoid wasps are a large group of hymenopteran superfamilies, with all but the wood wasps (Orussoidea) being in the wasp-waisted Apocrita. As parasitoids, they lay their eggs on or in the bodies of other arthropods, sooner or later causing the death of these hosts. Different species specialise in hosts from different insect orders, most often Lepidoptera, though some select beetles, flies, or bugs; the spider wasps (Pompilidae) exclusively attack spiders.

Parasitoid wasp species differ in which host life-stage they attack: eggs, larvae, pupae, or adults. They mainly follow one of two major strategies within parasitism: either they are endoparasitic, developing inside the host, and koinobiont, allowing the host to continue to feed, develop, and moult; or they are ectoparasitic, developing outside the host, and idiobiont, paralysing the host immediately. Some endoparasitic wasps of the superfamily Ichneumonoidea have a mutualistic relationship with polydnaviruses, the viruses suppressing the host's immune defenses.[1]

Parasitoidism evolved only once in the Hymenoptera, during the Permian, leading to a single clade called Euhymenoptera,[2] but the parasitic lifestyle has secondarily been lost several times including among the ants, bees, and vespid wasps. As a result, the order Hymenoptera contains many families of parasitoids, intermixed with non-parasitoid groups. The parasitoid wasps include some very large groups, some estimates giving the Chalcidoidea as many as 500,000 species, the Ichneumonidae 100,000 species, and the Braconidae up to 50,000 species. Host insects have evolved a range of defences against parasitoid wasps, including hiding, wriggling, and camouflage markings.

Many parasitoid wasps are considered beneficial to humans because they naturally control agricultural pests. Some are applied commercially in biological pest control, starting in the 1920s with Encarsia formosa to control whitefly in greenhouses. Historically, parasitoidism in wasps influenced the thinking of Charles Darwin.[3]

## Contents

* 1 Parasitoidism
* 1.1 Hosts
* 1.2 Life cycle
* 1.3 Mutualism with polydnavirus
* 2 Host defences
* 3 Evolution and taxonomy
* 3.1 Evolution
* 3.2 Taxonomy
* 4 Interactions with humans
* 4.1 Biological pest control
* 4.2 In culture
* 5 Notes
* 6 References

## Parasitoidism

Two strategies found among parasitoidal wasps: Ectoparasites are usually idiobiont, endoparasites koinobiont.

Parasitoid wasps range from some of the smallest species of insects to wasps about an inch long. Most females have a long, sharp ovipositor at the tip of the abdomen, sometimes lacking venom glands, and almost never modified into a sting outside of the aculeate groups.[4]

Parasitoids can be classified in many ways. They can live within their host's body as endoparasitoids, or feed on it from outside as ectoparasitoids: both strategies are found among the wasps. Parasitoids can also be divided according to their effect on their hosts. Idiobionts prevent further development of the host after initially immobilizing it, while koinobionts allow the host to continue its development while they are feeding upon it; and again, both types are seen in parasitoidal wasps. Most ectoparasitoid wasps are idiobiont, as the host could damage or dislodge the external parasitoid if allowed to move or moult. Most endoparasitoid wasps are koinobionts, giving them the advantage of a host that continues to grow larger and remains able to avoid predators.[4]

### Hosts

Many parasitoid wasps use larval Lepidoptera as hosts. Still, some groups parasitize different host life stages (egg, larva or nymph, pupa, adult) of nearly all other orders of insects, especially Coleoptera, Diptera, Hemiptera and other Hymenoptera. Some attack arthropods other than insects: for instance, the Pompilidae specialise in catching spiders: these are quick and dangerous prey, often as large as the wasp itself, but the spider wasp is quicker, swiftly stinging her prey to immobilise it. Adult female wasps of most species oviposit into their hosts' bodies or eggs. More rarely, parasitoid wasps may use plant seeds as hosts, such as Torymus druparum.[5]

Some also inject a mix of secretory products that paralyse the host or protect the egg from the host's immune system; these include polydnaviruses, ovarian proteins, and venom. If a polydnavirus is included, it infects the nuclei of host haemocytes and other cells, causing symptoms that benefit the parasite.[6][7]

Host size is important for the development of the parasitoid, as the host is its entire food supply until it emerges as an adult; small hosts often produce smaller parasitoids.[8] Some species preferentially lay female eggs in larger hosts and male eggs in smaller hosts, as the reproductive capabilities of males are limited less severely by smaller adult body size.[9]

Some parasitoid wasps mark the host with chemical signals to show that an egg has been laid there. This may both deter rivals from ovipositing and signal to itself that no further egg is needed in that host, effectively reducing the chances that offspring will have to compete for food and increasing the offspring's survival.[10][11]

* Spider wasp (Pompilidae), an idiobiont, carrying a jumping spider she has just paralysed back to her nest, where she lays an egg on it.

* An apparently healthy moth caterpillar feeds, grows, and moults...

* but endoparasitic koinobiont wasp larvae eventually fill its body and kill it.

* Hornworm with parasitic wasp cocoons

* Parasitized white cabbage larvae showing wasp larvae exiting its body, spinning cocoons. Playback at double speed. Adult wasps at normal speed

* Paracodrus apterogynus pupae inside the remains of a click beetle larva.

### Life cycle

On or inside the host, the parasitoid egg hatches into a larva or two or more larvae (polyembryony). Endoparasitoid eggs can absorb fluids from the host body and grow several times in size from when they were first laid before hatching. The first instar larvae are often highly mobile and may have strong mandibles or other structures to compete with other parasitoid larvae. The following instars are generally more grub-like. Parasitoid larvae have incomplete digestive systems with no rear opening. This prevents the hosts from being contaminated by their wastes. The larva feeds on the host's tissues until ready to pupate; by then, the host is generally either dead or almost so. A meconium, or the accumulated wastes from the larva, is cast out as the larva transitions to a prepupa.[12][13] Depending on its species, the parasitoid then may eat its way out of the host or remain in the more or less empty skin. In either case, it then generally spins a cocoon and pupates. As adults, parasitoid wasps feed primarily on nectar from flowers. Females of some species drink haemolymph from hosts to gain additional nutrients for egg production.[14]

* Polydnavirus-wasp mutualism: the virus protects koinobiont wasp eggs and larvae from immune suppression by the host's haemocytes.

### Mutualism with polydnavirus

Main article: Biology:Polydnavirus

Polydnaviruses are a unique group of insect viruses that have a mutualistic relationship with some parasitic wasps. The polydnavirus replicates in the oviducts of an adult female parasitoid wasp. The wasp benefits from this relationship because the virus protects the parasitic larvae inside the host, (i) by weakening the host's immune system and (ii) by altering the host's cells to be more beneficial to the parasite. The relationship between these viruses and the wasp is obligatory in the sense that all individuals are infected with the viruses; the virus has been incorporated in the wasp's genome and is inherited.[15][16][17]

## Host defences

Parasitoid wasp (Ichneumonidae) pointing ovipositor at cinnabar moth larva, just after ovipositing. The larva wriggles vigorously to try to avoid the attack.

File:Parasitic wasp and aphid.webm

The hosts of parasitoids have developed several levels of defence. Many hosts try to hide from the parasitoids in inaccessible habitats. They may also get rid of their frass (body wastes) and avoid plants that they have chewed on, as both can signal their presence to parasitoids hunting for hosts. The egg shells and cuticles of the potential hosts are thickened to prevent the parasitoid from penetrating them. Hosts may use behavioral evasion when they encounter an egg-laying female parasitoid, like dropping off the plant they are on, twisting and thrashing to dislodge or kill the female, and even regurgitating onto the wasp to entangle it. The wriggling can sometimes help by causing the wasp to "miss" laying the egg on the host and instead place it nearby. Wriggling of pupae can cause the wasp to lose its grip on the smooth, hard pupa or get trapped in the silk strands. Some caterpillars even bite the female wasps that approach them. Some insects secrete poisonous compounds that kill or drive away the parasitoid. Ants that are in a symbiotic relationship with caterpillars, aphids or scale insects may protect them from attack by wasps.[18][19]

Parasitoid wasps are vulnerable to hyperparasitoid wasps. Some parasitoid wasps change the behavior of the infected host, causing them to build a silk web around the pupae of the wasps after they emerge from its body to protect them from hyperparasitoids.[20]

Hosts can kill endoparasitoids by sticking haemocytes to the egg or larva in a process called encapsulation.[21] In aphids, the presence of a particular species of γ-3 Pseudomonadota makes the aphid relatively immune to their parasitoid wasps by killing many of the eggs. As the parasitoid's survival depends on its ability to evade the host's immune response, some parasitoid wasps have developed the counterstrategy of laying more eggs in aphids that have the endosymbiont, so that at least one of them may hatch and parasitize the aphid.[22][23]

Certain caterpillars eat plants that are toxic to both themselves and the parasite to cure themselves.[24] Drosophila melanogaster larvae also self-medicate with ethanol to treat parasitism.[25] D. melanogaster females lay their eggs in food containing toxic amounts of alcohol if they detect parasitoid wasps nearby. The alcohol protects them from the wasps, at the cost of retarding their own growth.[26]

## Evolution and taxonomy

### Evolution

Based on genetic and fossil analysis, parasitoidism has evolved only once in the Hymenoptera, during the Permian, leading to a single clade. All parasitoid wasps are descended from this lineage. The narrow-waisted Apocrita emerged during the Jurassic.[27][28][29][30] The Aculeata, which includes bees, ants, and parasitoid spider wasps, evolved from within the Apocrita; it contains many families of parasitoids, though not the Ichneumonoidea, Cynipoidea, and Chalcidoidea. The Hymenoptera, Apocrita, and Aculeata are all clades, but since each of these contains non-parasitic species, the parasitoid wasps, formerly known as the Parasitica, do not form a clade on their own.[30][31] The common ancestor in which parasitoidism evolved lived approximately 247 million years ago and was previously believed to be an ectoparasitoid wood wasp that fed on wood-boring beetle larvae. Species similar in lifestyle and morphology to this ancestor still exist in the Ichneumonoidea.[32][33] However, recent molecular and morphological analysis suggests this ancestor was endophagous, meaning it fed from within its host.[30] A significant radiation of species in the Hymenoptera occurred shortly after the evolution of parasitoidy in the order and is thought to have been a result of it.[31][33] The evolution of a wasp waist, a constriction in the abdomen of the Apocrita, contributed to rapid diversification as it increased the maneuverability of the ovipositor, the organ of the rear segment of the abdomen used to lay eggs.[34]

The phylogenetic tree gives a condensed overview of the positions of parasitoidal groups (boldface), amongst groups like the Vespidae which have secondarily abandoned the parasitoid habit. The approximate numbers of species estimated to be in these groups, often much larger than the number so far described, are shown in parentheses, with estimates for the most populous also shown in boldface, like "(150,000)". Not all species in these groups are parasitoidal: for example, some Cynipoidea are phytophagous.

Hymenoptera |  | "Symphyta"  |

sawflies 50px

|

no waist
parasitoidism |  | Orussoidea |

(wood wasps, 85) 45px

|

no waist
Apocrita |  | Ichneumonoidea |

(150,000) 80px

|

long ovipositor
|  | Proctotrupomorpha |  |  |

Cynipoidea (3,000) 60px

|

|  |  |

Proctotrupoidea (400) 50px

|

Platygastroidea (4000) 50px

Chalcidoidea (500,000) 60px

other Superfamilies

mainly small
Aculeata |  |  |

Chrysididae (jewel wasps, 3000) 60px

|

|  |  |

Vespidae (wasps, hornets, 5000) 60px

|

|  |  |  |  |

Mutillidae (velvet ants, 3000) 60px

|

Pompilidae (spider wasps, 5000) 50px

other families

|  |  |

Scoliidae (560) 90px

|

|  |  |

Formicidae (ants, 22,000) 60px

|

Apoidea |  |  |

Ampulicidae (170)

|

|  |  |

Sphecidae (700) 60px

|

|  |  |

Bembicidae (1800) 60px

|

|  |  |

other families

|

|  |  |  |  |

Pemphredonidae (aphid wasps, 556) 60px

|

Philanthidae (1100) 60px

|  |  |

Anthophila (bees, 22,000) 60px

|

Ammoplanidae (aphid wasps, 130)

stinging
wasp waist
evolved once

### Taxonomy

Trissolcus (family Platygastridae) on Chinavia eggs Housefly pupae killed by parasitoid wasp larvae (probably Pteromalidae). Each pupa has one hole through which a single adult wasp has emerged after feeding on the housefly larva.

The parasitoid wasps are paraphyletic since the ants, bees, and non-parasitic wasps such as the Vespidae are not included, and there are many members of mainly parasitoidal families which are not themselves parasitic. Listed are Hymenopteran families where most members have a parasitoid lifestyle.[35]

Symphyta:

* Orussidae

Apocrita:

* Scolebythidae
* Bethylidae
* Chrysididae
* Sclerogibbidae
* Dryinidae
* Embolemidae
* Tiphiidae
* Thynnidae
* Sapygidae
* Mutillidae
* Bradynobaenidae
* Chyphotidae
* Sierolomorphidae
* Braconidae
* Ichneumonidae
* Pompilidae
* Rhopalosomatidae
* Aulacidae
* Evaniidae
* Gasteruptiidae
* Stephanidae
* Megalyridae
* Trigonalidae
* Ibaliidae
* Liopteridae
* Figitidae
* Austroniidae
* Diapriidae
* Heloridae
* Monomachidae
* Pelecinidae
* Peradeniidae
* Proctotrupidae
* Roproniidae
* Vanhorniidae
* Platygastridae
* Scelionidae
* Megaspilidae
* Ceraphronidae
* Mymarommatidae
* Chalcidoidea (19 families)
* Ampulicidae

## Interactions with humans

### Biological pest control

Encarsia formosa, an endoparasitic aphelinid wasp, bred commercially to control whitefly in greenhouses Trioxys complanatus, (Aphidiinae) ovipositing into a spotted alfalfa aphid, a commercial pest in Australia.[lower-alpha 1]

Parasitoid wasps are considered beneficial as they naturally control the population of many pest insects. They are widely used commercially (alongside other parasitoids such as tachinid flies) for biological pest control, for which the most important groups are the ichneumonid wasps, which prey mainly on caterpillars of butterflies and moths; braconid wasps, which attack caterpillars and a wide range of other insects including greenfly; chalcidoid wasps, which parasitise eggs and larvae of greenfly, whitefly, cabbage caterpillars, and scale insects.[37]

One of the first parasitoid wasps to enter commercial use was Encarsia formosa, an endoparasitic aphelinid. It has been used to control whitefly in greenhouses since the 1920s. Use of the insect fell almost to nothing, replaced by chemical pesticides by the 1940s. Since the 1970s, usage has revived, with renewed usage in Europe and Russia.[38] In some countries, such as New Zealand, it is the primary biological control agent used to control greenhouse whiteflies, particularly on crops such as tomato, a difficult plant for predators to establish on.[39]

Commercially, there are two types of rearing systems: short-term seasonal daily output with high production of parasitoids per day, and long-term year-round low daily output with a range in production of 4–1000 million female parasitoids per week as of 1996[update], to meet demand for suitable parasitoids for different crops.[40]

### In culture

Parasitoid wasps influenced the thinking of Charles Darwin.[lower-alpha 2] In an 1860 letter to the American naturalist Asa Gray, Darwin wrote: "I cannot persuade myself that a beneficent and omnipotent God would have designedly created parasitic wasps with the express intention of their feeding within the living bodies of Caterpillars."[3] The palaeontologist Donald Prothero notes that religiously-minded people of the Victorian era, including Darwin, were horrified by this instance of evident cruelty in nature, particularly noticeable in the Ichneumonidae.[42]

## Notes

1. ↑ Trioxys complanatus has been introduced to Australia to control the spotted alfalfa aphid.[36]
2. ↑ Darwin mentions "parasitic" wasps in On the Origin of Species, Chapter 7, page 218.[41]

## References

1. ↑ Herniou, Elisabeth A.; Huguet, Elisabeth; Thézé, Julien; Bézier, Annie; Periquet, Georges; Drezen, Jean-Michel (2013-09-19). "When parasitic wasps hijacked viruses: genomic and functional evolution of polydnaviruses". Phil. Trans. R. Soc. B 368 (1626). doi:10.1098/rstb.2013.0051. PMID 23938758.
2. ↑ Zhang, Qi; Kopylov, Dmitry S.; Rasnitsyn, Alexandr P.; Zheng, Yan; Zhang, Haichun (November 2020). Smith, Andrew. ed. "Burmorussidae, a new family of parasitic wasps (Insecta, Hymenoptera) from mid-Cretaceous Burmese amber". Papers in Palaeontology 6 (4): 593–603. doi:10.1002/spp2.1312. ISSN 2056-2802. Bibcode: 2020PPal....6..593Z. https://onlinelibrary.wiley.com/doi/10.1002/spp2.1312.
3. ↑ 3.0 3.1 "Letter 2814 — Darwin, C. R. to Gray, Asa, 22 May [1860"]. http://www.darwinproject.ac.uk/entry-2814.
4. ↑ 4.0 4.1 Gullan, P. J.; Cranston, P. S. (2010). The Insects: An Outline of Entomology (5th ed.). Wiley. pp. 362–370. ISBN 978-1-118-84615-5.
5. ↑ Cushman R. A. (1916). "Syntomaspis druparum, the apple-seed chalcid". Journal of Agricultural Research 7: 487–502. https://naldc.nal.usda.gov/download/IND43965627/pdf.
6. ↑ Miller, Lois K.; Ball, Laurence Andrew (1998). The insect viruses. Springer. ISBN 978-0-306-45881-1. https://books.google.com/books?id=QAwsTrfwSgMC.
7. ↑ Strand, Michael R.; Burke, Gaelen R. (May 2015). "Polydnaviruses: From discovery to current insights". Virology 479-480: 393–402. doi:10.1016/j.virol.2015.01.018. PMID 25670535.
8. ↑ Cohen, J. E.; Jonsson, T.; Muller, C. B.; Godfray, H. C. J.; Savage, V. M. (12 January 2005). "Body sizes of hosts and parasitoids in individual feeding relationships". Proceedings of the National Academy of Sciences 102 (3): 684–689. doi:10.1073/pnas.0408780102. PMID 15647346. Bibcode: 2005PNAS..102..684C. Template:Oa
9. ↑ Jones, W. Thomas (1982). "Sex Ratio and Host Size in a Parasitoid Wasp". Behavioral Ecology and Sociobiology 10 (3): 207–210. doi:10.1007/bf00299686. Bibcode: 1982BEcoS..10..207J.
10. ↑ Couchoux, Christelle; Seppä, Perttu; van Nouhuys, Saskya (2015). "Behavioural and genetic approaches to evaluate the effectiveness of deterrent marking by a parasitoid wasp". Behaviour 152 (9): 1257–1276. doi:10.1163/1568539X-00003277.
11. ↑ Nufio, César R.; Papaj, Daniel R. (2001). "Host marking behavior in phytophagous insects and parasitoids". Entomologia Experimentalis et Applicata 99 (3): 273–293. doi:10.1046/j.1570-7458.2001.00827.x. Bibcode: 2001EEApp..99..273N. Template:Oa
12. ↑ Paladino, Leonela Zusel Carabajal; Papeschi, Alba Graciela; Cladera, Jorge Luis (January 2010). "Immature stages of development in the parasitoid wasp, Diachasmimorpha longicaudata". Journal of Insect Science 10 (1): 56. doi:10.1673/031.010.5601. PMID 20569133. Template:Oa
13. ↑ "Cotesia congregata - a parasitoid wasp". http://entnemdept.ufl.edu/creatures/misc/wasps/cotesia_congregata.htm.
14. ↑ Jervis, M. A.; Kidd, N. A. C (November 1986). "Host-Feeding Strategies in Hymenopteran Parasitoids". Biological Reviews 61 (4): 395–434. doi:10.1111/j.1469-185x.1986.tb00660.x.
15. ↑ Fleming, J. G.; Summers, M. D. (1991). "Polydnavirus DNA is integrated in the DNA of its parasitoid wasp host". PNAS 88 (21): 9770–9774. doi:10.1073/pnas.88.21.9770. PMID 1946402. Bibcode: 1991PNAS...88.9770F.
16. ↑ Webb, Bruce A. (1998). "Polydnavirus Biology, Genome Structure, and Evolution". The Insect Viruses. Springer, Boston, MA. pp. 105–139. doi:10.1007/978-1-4615-5341-0_5. ISBN 978-1-4613-7437-4.
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19. ↑ Gross, P. (1993). "Insect Behavioral and Morphological defences Against Parasitoids". Annual Review of Entomology 38: 251–273. doi:10.1146/annurev.en.38.010193.001343.
20. ↑ Tanaka, S.; Ohsaki, N. (2006). "Behavioral manipulation of host caterpillars by the primary parasitoid wasp Cotesia glomerata (L.) to construct defensive webs against hyperparasitism". Ecological Research 21 (4): 570. doi:10.1007/s11284-006-0153-2. Bibcode: 2006EcoR...21..570T.
21. ↑ Pennacchio, Francesco; Caccia, Silvia; Digilio, Maria Cristina (December 2014). "Host regulation and nutritional exploitation by parasitic wasps". Current Opinion in Insect Science 6: 74–79. doi:10.1016/j.cois.2014.09.018. ISSN 2214-5745. PMID 32846685. Bibcode: 2014COIS....6...74P.
22. ↑ Oliver, K. M.; Russell, J. A.; Moran, N. A.; Hunter, M. S. (2003). "Facultative bacterial symbionts in aphids confer resistance to parasitic wasps". Proceedings of the National Academy of Sciences 100 (4): 1803–7. doi:10.1073/pnas.0335320100. PMID 12563031. Bibcode: 2003PNAS..100.1803O.
23. ↑ Oliver, K. M.; Noge, K.; Huang, E. M.; Campos, J. M.; Becerra, J. X.; Hunter, M. S. (2012). "Parasitic wasp responses to symbiont-based defence in aphids". BMC Biology 10: 11. doi:10.1186/1741-7007-10-11. PMID 22364271.
24. ↑ Singer, M. S.; Mace, K. C.; Bernays, E. A. (2009). May, Robin Charles. ed. "Self-Medication as Adaptive Plasticity: Increased Ingestion of Plant Toxins by Parasitized Caterpillars". PLOS ONE 4 (3). doi:10.1371/journal.pone.0004796. PMID 19274098. Bibcode: 2009PLoSO...4.4796S.
25. ↑ Milan, N. F.; Kacsoh, B. Z.; Schlenke, T. A. (2012). "Alcohol Consumption as Self-Medication against Blood-Borne Parasites in the Fruit Fly". Current Biology 22 (6): 488–493. doi:10.1016/j.cub.2012.01.045. PMID 22342747. Bibcode: 2012CBio...22..488M.
26. ↑ Kacsoh, B. Z.; Lynch, Z. R.; Mortimer, N. T.; Schlenke, T. A. (2013). "Fruit Flies Medicate Offspring After Seeing Parasites". Science 339 (6122): 947–50. doi:10.1126/science.1229625. PMID 23430653. Bibcode: 2013Sci...339..947K.
27. ↑ Branstetter, Michael G.; Danforth, Bryan N.; Pitts, James P.; Faircloth, Brant C.; Ward, Philip S.; Buffington, Matthew L.; Gates, Michael W.; Kula, Robert R. et al. (2017). "Phylogenomic Insights into the Evolution of Stinging Wasps and the Origins of Ants and Bees". Current Biology 27 (7): 1019–1025. doi:10.1016/j.cub.2017.03.027. PMID 28376325. Bibcode: 2017CBio...27.1019B. Template:Oa
28. ↑ Schulmeister, S. (2003). "Simultaneous analysis of basal Hymenoptera (Insecta), introducing robust-choice sensitivity analysis". Biological Journal of the Linnean Society 79 (2): 245–275. doi:10.1046/j.1095-8312.2003.00233.x. Template:Oa
29. ↑ Schulmeister, S.. "Symphyta". http://susanne.schulmeister.com/Symphyta.html.
30. ↑ 30.0 30.1 30.2 Peters, Ralph S.; Krogmann, Lars; Mayer, Christoph; Donath, Alexander; Gunkel, Simon; Meusemann, Karen; Kozlov, Alexey; Podsiadlowski, Lars et al. (2017). "Evolutionary History of the Hymenoptera". Current Biology 27 (7): 1013–1018. doi:10.1016/j.cub.2017.01.027. PMID 28343967. Bibcode: 2017CBio...27.1013P.
31. ↑ 31.0 31.1 Heraty, John; Ronquist, Fredrik; Carpenter, James M.; Hawks, David; Schulmeister, Susanne; Dowling, Ashley P.; Murray, Debra; Munro, James et al. (2011). "Evolution of the hymenopteran megaradiation". Molecular Phylogenetics and Evolution 60 (1): 73–88. doi:10.1016/j.ympev.2011.04.003. PMID 21540117. Bibcode: 2011MolPE..60...73H. https://escholarship.org/content/qt2f33z9mz/qt2f33z9mz.pdf?t=mxnb1e.
32. ↑ Pennacchio, Francesco; Strand, Michael R. (January 2006). "Evolution of developmental strategies in parasitic hymenoptera". Annual Review of Entomology 51 (1): 233–258. doi:10.1146/annurev.ento.51.110104.151029. PMID 16332211.
33. ↑ 33.0 33.1 Whitfield, James B. (2003). "Phylogenetic Insights into the Evolution of Parasitism in Hymenoptera". Advances in Parasitology 54: 69–100. doi:10.1016/S0065-308X(03)54002-7. ISBN 978-0-12-031754-7. PMID 14711084.
34. ↑ Peters, Ralph S.; Krogmann, Lars; Mayer, Christoph; Donath, Alexander; Gunkel, Simon; Meusemann, Karen; Kozlov, Alexey; Podsiadlowski, Lars et al. (April 2017). "Evolutionary History of the Hymenoptera". Current Biology 27 (7): 1013–1018. doi:10.1016/j.cub.2017.01.027. ISSN 0960-9822. PMID 28343967. Bibcode: 2017CBio...27.1013P.
35. ↑ Hymenoptera of the world: an identification guide to families. Centre for Land and Biological Resources Research. 1993. ISBN 978-0-660-14933-2. OCLC 28024976.
36. ↑ Wilson, C. G.; Swincer, D. E.; Walden, K. J. (1982). "The Introduction of Trioxys Complanatus Quilis (Hymenoptera: Aphidiidae), an Internal Parasite of the Spotted Alfalfa Aphid, into South Australia". Australian Journal of Entomology 21 (1): 13–27. doi:10.1111/j.1440-6055.1982.tb01758.x.
37. ↑ "Parasitoid Wasps (Hymenoptera)". University of Maryland. https://extension.umd.edu/hgic/insects/parasitoid-wasps-hymenoptera.
38. ↑ Hoddle, M. S.; Van Driesche, R. G.; Sanderson, J. P. (1998). "Biology and Use of the Whitefly Parasitoid Encarsia Formosa". Annual Review of Entomology 43 (1): 645–669. doi:10.1146/annurev.ento.43.1.645. PMID 15012401.
39. ↑ "Enforce for Greenhouse Whitefly Control". New Zealand: Bioforce Limited. http://www.bioforce.net.nz/products/enforce.html.
40. ↑ Smith, S. M. (1996). "Biological control with Trichogramma: advances, successes, and potential of their use". Annual Review of Entomology 41: 375–406. doi:10.1146/annurev.en.41.010196.002111. PMID 15012334.
41. ↑ On the Origin of Species, Chapter 7, page 218.
42. ↑ Prothero, Donald R. (2017). Evolution: What the Fossils Say and Why It Matters. Columbia University Press. pp. 84–86. ISBN 978-0-231-54316-3. https://books.google.com/books?id=-LIvDwAAQBAJ&pg=PT85.

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Human interactions with insects

Aspects
of insects
in culture|

| In the arts|

* Insects in art
* Beetlewing
* John Hampson
* Insects in film
* Insects in literature
* Insects in music
* List of insect-inspired songs
* Insects on stamps

|

In fishing|

* Fishing bait
* Fly fishing
* Artificial fly
* Fly tying
* Maggot
* Mayfly
* Mealworm

In medicine|

* Apitherapy
* Apitoxin
* Melittin
* Maggot
* Spanish fly
* Cantharidin

In mythology|

* Bee
* Butterfly
* Cicada
* Dragonfly
* Praying mantis
* Scarab

Entomophagy
(as food)|

| Adults|

* Ant
* Cicada
* Cricket
* Grasshopper
* Termite

|

Larvae|

* Bamboo worm
* Mealworm
* Mopane worm
* Palm weevil
* Rhinoceros beetle
* Silkworm
* Waxworm
* Witchetty grub

Other aspects|

* Biomimicry
* Cockroach racing
* Cricket fighting
* Entomological warfare
* Flea circus
* Insects in religion
* Jingzhe

Economic
entomology|

| Beneficial
insects|

| Pest control|

* Encarsia formosa
* Ladybird
* Parasitoid wasp

|

Pollination|

* Bees
* crops pollinated
* Bumblebee
* Honey bee
* western
* Beetles
* Flies
* Lepidoptera

Products|

| Beekeeping|

* Bee pollen
* Beeswax
* Honey
* Propolis
* Royal jelly

|

Other insects|

* Carmine/Cochineal
* Polish
* Chitin
* Kermes
* Sericulture
* Silk
* Lac/Shellac

Model organism|

* Drosophila melanogaster

Harmful
insects|

| Crop pests|

* Aphid
* Boll weevil
* Colorado potato beetle
* Cottony cushion scale
* Japanese beetle
* Locust
* Phylloxera
* Western corn rootworm

|

Livestock pests|

* Botfly
* Deer fly
* Horn fly
* Horse-fly
* Screwworm fly
* Tsetse fly
* Warble fly

Biting/stinging|

* Insect bites and stings
* Insect sting allergy
* Bed bug
* Bee sting
* Fire ant
* Flea
* Horse-fly
* Louse
* Mosquito
* Wasp

Wood-eating|

* Deathwatch beetle
* Furniture beetle
* House longhorn beetle
* Termite
* Woodworm

Other pests|

* Home-stored product entomology
* Clothes moth
* Cockroach
* Housefly

Pioneers|

* Jan Swammerdam
* Alfred Russel Wallace
* Jean-Henri Fabre
* Hans Zinsser (Rats, Lice and History)
* Lafcadio Hearn (Insect Literature)

Concerns|

* Bees and toxic chemicals
* Colony collapse disorder
* Decline in insect populations
* Habitat destruction
* List of endangered insects
* Pesticide
* Insecticide
* Imidacloprid effects on bees
* Neonicotinoid
* Pesticide toxicity to bees

Related|

* Biology in fiction
* Human uses of living things
* Arthropods
* Birds
* Fish
* Fungi
* Mammals
* Microbes
* Molluscs
* Reptiles
* Plants
* Zoomusicology

Categories,
templates|

* Insects and humans
* Insecticides
* Pesticides

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