List of sterile insect technique trials

The sterile insect technique (SIT) is an environmentally friendly method for the biological control of pests using area-wide inundative release of sterile insects to reduce reproduction in a field population of the same species (IPPC, 2007). SIT technique may be applied as part of an area-wide control (integrated pest management) approach of insects of medical, veterinary, and agricultural importance. It was in 1937 when Edward Knipling proposed using sterilization to control or eradicate insect pests after observation that screwworm fly males mate repeatedly while females mate only once. He then made the hypothesis that if large numbers of sterile males could repeatedly be released into wild populations, it would eventually eliminate population reproduction and lead to eradication.[1][2][3]

This table is a list of sterile insect technique trials worldwide.

Target Year Location Method Outcome
Tsetse fly 1944–1946 Tanzania Release of Glossina morsitans centralis into a Glossina swynnertoni population Hybrid males were sterile and the female hybrids partially sterile. 99% suppression in 26 km2[4][5]
Cochliomyia hominivorax 1951 United States: Sanibel Island (47 km2), Florida and China Release 39 sterile male flies per km2 per week for several weeks Field evaluation pilot test. Resulted in up to 100% sterility of the egg masses, greatly reduced the wild population, incomplete eradication because of the wild fertile flies flying from the mainland.[6]
Cochliomyia hominivorax 1954 Netherlands Antilles: Curaçao (435 km2) Released 155 sterile males per km2 per week 100% egg sterility after 2 generations. Evident eradication was accomplished within 14 weeks. Releases were stopped after 22 weeks.[7]
Cochliomyia hominivorax 1958–1959 United States: Florida Release 155–1160 sterile flies per km2 per week Eradication. Total cost was $11M, about 50% of the annual losses.[8]
Cochliomyia hominivorax 1962–1966 United States: Texas and western states Release 200–1000 sterile flies per km2 per week Declared eradication in Texas and New Mexico in 1964 and in the entire USA in 1966. Thereafter, the program goal changed to population containment from the initial eradication[8]
Cochliomyia hominivorax 1984–2001 Central America Sterile flies release Declared eradication in Mexico, 1991, Guatemala, 1994, El Salvador 1995, Honduras 1996, Nicaragua 1999, Costa Rica 2000, Panama, 2001[4][8]
Cochliomyia hominivorax 1990–1992 Libya Release 40 million sterile flies per week Operated by a joint FAO/IAEA Division. Only 6 instances of wounds infested with screwworm larvae were found in 1991, compared with more than 12000 cases in 1990. Eradication was declared in June 1992[9]
Mexican fruit fly 1964–current United States: Southern California and Texas For eradication, release 96,000 and 61,500 sterile flies per km2 per week in CA and TX, respectively Started to eradicate in CA in 1964 and to exclude in TX a decade later. Continued as containment program[4][10]
Bactrocera tryoni 1962– Australia Released 1600 million sterile flies in 1990. For containment method, release 60,000 sterile flies per km2 for 12 weeks after catching the last wild fly. Field trials began in 1962. Population was suppressed strongly, but not eradicated because of long-range immigrants. Eradication was achieved in Western Australia in 1990. Since the mid-1990s, it has been used as containment method.[11]
Ceratitis capitata 1978– Mexico and Guatemala Produced 500 million and 3,500 million sterile flies per week in Mexico and Guatemala, respectively First large-scale fruit fly AW-IPM program using SIT. Eradication in 1982. For over 25 years, this program kept Mexico, the US, and half of Guatemala free of the pest. Genetic sexing strains were later introduced.[12][13]
Melon fly 1972–1993 Japan Released up to 4 million sterile fly pupae per week, total 264 million during the pilot test. Total 50,000 million sterile flies were released. A pilot experiment began in 1972 and eradication was declared in 1978. An operation program started in 1984. Complete eradication achieved in 1993.[14]
Ceratitis capitata 1980s– Israel Released males Genetic sexing strain[15]
Ceratitis capitata 1994– United States: California and Florida Release sterile males of the tsl sexing strain VIENNA 7 Started as eradication program. It was successful and cost-effective and thereafter (1996) applied as a permanent preventative program in CA, FL, and Guatemala.[16][17][18]
Ceratitis capitata 1997– Jordan-Israel-Palestine Released genetic sexing strain VIENNA 7 As population suppression rather than eradication[19]
Onion maggot 1981– Netherlands Sterile insects are provided from a private source The program has not been able to expand beyond 16% of the onion production area due to free-riders. Ongoing long-term suppression program over 20 years[20]
Tsetse fly 1970–1990s Burkina Faso (3,000 km2), Nigeria (1,500 km2) and Tanzania (1,650 km2) Combination method with attractant traps and insecticides Eradication[21][22][23]
Tsetse fly 1990s Uganda Autosterilization of wild flies Suppression[24]
Anopheles quadrimaculatus 1959–1960 United States: Florida Release adult males after sterilizing in pupal stage. 430,000 males over 48 wks at 2 locations Poor competitiveness. No population reduction.[25]
Culex quinquefasciatus 1967 Myanmar: Okpo Release 5000 daily for 9 wks. Sterility from cytoplasmic incompatibility Population eliminated[26]
Culex quinquefasciatus 1969 United States: Florida Release 930,000 males over 12 wks after chemosterilization with thiotepa Population suppressed and eliminated partially due to the sterile males released[27]
Culex pipiens 1970 France Release hundreds of thousands over 8 wks after sterilizing with chromosome translocation Population reduced due to the persistent translocation[28]
Culex quinquefasciatus 1973 India: Delhi Release 300,000 sterile males daily over 14 wks, total 23 million. Sterilization with cytoplasmic incompatibility, and chromosome translocation. Population reduced due to the established sterility from cytoplasmic incompatibility and translocation.[29]
Culex quinquefasciatus 1973 India: Delhi Release total 38 million sterile males over 25 wks. Chemoterilization with thiotepa. Up to 90% sterile eggs, but no clear population suppression due to immigration[30]
Aedes aegypti 1974 Kenya: Mombasa Release 57,000 genetically modified males over 10 wks. Sterilization with chromosome translocation Partial sterility, but no long-term persistent translocation[31]
Anopheles albimanus 1972 El Salvador: Lake Apastepeque Released 4.4 million sterile males over 22 wks. Chemosterilization of genetic sexing strain pupae with bisazir. 100% sterility induced in wild population. Well below detection level after 5 months.[32]
Anopheles albimanus 1977–1979 El Salvador: Pacific coast Released 100s million males. Bisazir sterilization. Use genetic sexing strain (MACHO). Target field population was reduced by 97%, but eradication prevented by unexpected immigration.[33]
Culex tarsalis 1981 United States: California Released 85,000 males over 8 wks after sterilizing with adult irradiation Assortative mating was observed, but no population reduction.[34]
Cockchafers 1959, 1962 Switzerland Released 3,109 and 8,594 males after radiation sterilization. Field trials. The population was reduced by 80% and 100%.[35]
Boll weevil 1971–1973 United States: Mississippi Combined methods of insecticide and SIT Large pilot field experiment. Population was suppressed below detection levels in 203 of 236 fields. The remainder were close to uncontrolled area (less than 40 km).[36]
Sweetpotato weevil 1994–1999 Japan Released sterile weevils after insecticide application. Complete eradication[37]
Lepidoptera 1994 Canada: British Columbia Released irradiated codling moths As a population suppression method[38]
Aedes albopictus 2012 Reunion Island Semi field condition test using the sterilizing dose of 40 Gy with cesium-137 irradiator two-fold reduction of the wild population's fertility[39]
Aedes aegypti 2017-2018 Queensland, Australia Released >3 million males sterilized with the natural bacteria Wolbachia 80% reduction of the population in trial areas[40][41]

See also edit

References edit

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  2. ^ Knipling, E.F. 1979. The basic principles of insect population and suppression and management. USDA handbook. Washington, D.C., USDA.
  3. ^ Knipling, E.F. 1985. Sterile insect technique as a screwworm control measure: the concept and its development. Symposium on eradication of the screwworm from the United States and Mexico. Misc. Pub. Entomol. Soc. Am., 62: 4–7.
  4. ^ a b c Klassen, W., C. F. Curtis. 2005. History of the sterile insect technique, pp. 3–36 In V. A. Dyck, J. Hendrichs, and A. S. Robinson. The Sterile Insect Technique: Principles and Practice in Area-Wide Integrated Pest Management. Springer, Dordrecht, The Netherlands. 787 pp.
  5. ^ Vanderplank, F. L. 1947. Experiments in the hybridization of tsetse flies ("Glossina Diptera") and the possibility of a new method of control. Transactions of the Royal Entomological Society (London) 98: 1–18.
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  8. ^ a b c New World Screwworm eradication
  9. ^ Food and Agriculture Organization of the United Nations. 1992. The New World screwworm eradication programme. North Africa 1988–1992. FAO. Rome, Italy.
  10. ^ Mexican fruit fly program in CA and TX
  11. ^ Fisher, K. 1996. Queensland fruit fly (Bactrocera tryoni): eradication from Western Australia, pp. 535– 541. In B. A. McPheron and G. J. Steck (eds.), Fruit fly pests. A world assessment of their biology and management. St. Lucie Press, Delray Beach, FL, USA.
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  38. ^ Bloem, K. A., and S. Bloem. 2000. SIT for codling moth eradication in British Columbia, Canada, pp. 207–214. In K. H. Tan (ed.), Proceedings: Area-Wide Control of Fruit Flies and Other Insect Pests. International Conference on Area-Wide Control of Insect Pests, and the 5th International Symposium on Fruit Flies of Economic Importance, 28 May–5 June 1998, Penang, Malaysia. Penerbit Universiti Sains Malaysia, Pulau Pinang, Malaysia.
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  40. ^ "Trial wipes out more than 80 per cent of disease-spreading mozzie". 10 July 2018. Retrieved 11 July 2018.
  41. ^ Yeung, Jessie (10 July 2018). "Australian experiment wipes out over 80% of disease-carrying mosquitoes". CNN. Retrieved 11 July 2018.

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