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] |
Tsetse are large, biting flies that inhabit much of tropical Africa. Tsetse flies include all the species in the genus Glossina, which are placed in their own family, Glossinidae. The tsetse is an obligate parasite, which lives by feeding on the blood of vertebrate animals. Tsetse has been extensively studied because of their role in transmitting disease. They have a pronounced economic impact in sub-Saharan Africa as the biological vectors of trypanosomes, causing human and animal trypanosomiasis.
Integrated pest management (IPM), also known as integrated pest control (IPC) is a broad-based approach that integrates both chemical and non-chemical practices for economic control of pests. IPM aims to suppress pest populations below the economic injury level (EIL). The UN's Food and Agriculture Organization defines IPM as "the careful consideration of all available pest control techniques and subsequent integration of appropriate measures that discourage the development of pest populations and keep pesticides and other interventions to levels that are economically justified and reduce or minimize risks to human health and the environment. IPM emphasizes the growth of a healthy crop with the least possible disruption to agro-ecosystems and encourages natural pest control mechanisms." Entomologists and ecologists have urged the adoption of IPM pest control since the 1970s. IPM allows for safer pest control.
The Calliphoridae are a family of insects in the order Diptera, with almost 1,900 known species. The maggot larvae, often used as fishing bait, are known as gentles. The family is known to be polyphyletic, but much remains disputed regarding proper treatment of the constituent taxa, some of which are occasionally accorded family status.
The sterile insect technique (SIT) is a method of biological insect control, whereby overwhelming numbers of sterile insects are released into the wild. The released insects are preferably male, as this is more cost-effective and the females may in some situations cause damage by laying eggs in the crop, or, in the case of mosquitoes, taking blood from humans. The sterile males compete with fertile males to mate with the females. Females that mate with a sterile male produce no offspring, thus reducing the next generation's population. Sterile insects are not self-replicating and, therefore, cannot become established in the environment. Repeated release of sterile males over low population densities can further reduce and in cases of isolation eliminate pest populations, although cost-effective control with dense target populations is subjected to population suppression prior to the release of the sterile males.
Vector control is any method to limit or eradicate the mammals, birds, insects or other arthropods which transmit disease pathogens. The most frequent type of vector control is mosquito control using a variety of strategies. Several of the "neglected tropical diseases" are spread by such vectors.
The Tephritidae are one of two fly families referred to as fruit flies, the other family being the Drosophilidae. The family Tephritidae does not include the biological model organisms of the genus Drosophila, which is often called the "common fruit fly". Nearly 5,000 described species of tephritid fruit fly are categorized in almost 500 genera of the Tephritidae. Description, recategorization, and genetic analyses are constantly changing the taxonomy of this family. To distinguish them from the Drosophilidae, the Tephritidae are sometimes called peacock flies, in reference to their elaborate and colorful markings. The name comes from the Greek τεφρος, tephros, meaning "ash grey". They are found in all the biogeographic realms.
The Queensland fruit fly is a species of fly in the family Tephritidae in the insect order Diptera. B. tryoni is native to subtropical coastal Queensland and northern New South Wales. They are active during the day, but mate at night. B. tryoni lay their eggs in fruit. The larvae then hatch and proceed to consume the fruit, causing the fruit to decay and drop prematurely. B. tryoni are responsible for an estimated $28.5 million a year in damage to Australian crops and are the most costly horticultural pest in Australia. Up to 100% of exposed fruit can be destroyed due to an infestation of this fly species. Previously, pesticides were used to eliminate B. tryoni from damaging crops. However, these chemicals are now banned. Thus, experts devoted to B. tryoni control have transitioned to studying this pests' behaviors to determine a new method of elimination.
Economic entomology is a field of entomology, which involves the study of insects that benefit or harm humans, domestic animals, and crops. Insects that pose disadvantages are considered pests. Some species can cause indirect damage by spreading diseases, and these are termed as disease vectors. Those that are beneficial include those that are reared for food such as honey, substances such as lac or pigments, and for their role in pollinating crops and controlling pests.
Ceratitis capitata, commonly known as the Mediterranean fruit fly or medfly, is a yellow-and-brown fly native to sub-Saharan Africa. It has no near relatives in the Western Hemisphere and is considered to be one of the most destructive fruit pests in the world. There have been occasional medfly infestations in California, Florida, and Texas that require extensive eradication efforts to prevent the fly from establishing itself in the United States.
Bactrocera dorsalis, previously known as Dacus dorsalis and commonly referred to as the oriental fruit fly, is a species of tephritid fruit fly that is endemic to Southeast Asia. It is one of the major pest species in the genus Bactrocera with a broad host range of cultivated and wild fruits. Male B. dorsalis respond strongly to methyl eugenol, which is used to monitor and estimate populations, as well as to annihilate males as a form of pest control. They are also important pollinators and visitors of wild orchids, Bulbophyllum cheiri and Bulbophyllum vinaceum in Southeast Asia, which lure the flies using methyl eugenol.
The Tephritid Workers Database is a web-based database for sharing information on tephritid fruit flies. Because these species are one of the most economically important group of insect species that threaten fruit and vegetable production and trade worldwide, a tremendous amount of information is made available each year: new technologies developed, new information on their biology and ecology; new control methods made available, new species identified, new outbreaks recorded and new operational control programmes launched. The TWD allows workers to keep up-to-date on the most recent developments and provides an easily accessible and always available resource.
Cochliomyia is a genus in the family Calliphoridae, known as blowflies, in the order Diptera. Cochliomyia is commonly referred to as the New World screwworm flies, as distinct from Old World screwworm flies. Four species are in this genus: C. macellaria, C. hominivorax, C. aldrichi, and C. minima. C. hominivorax is known as the primary screwworm because its larvae produce myiasis and feed on living tissue. This feeding causes deep, pocket-like lesions in the skin, which can be very damaging to the animal host. C. macellaria is known as the secondary screwworm because its larvae produce myiasis, but feed only on necrotic tissue. Both C. hominivorax and C. macellaria thrive in warm, tropical areas.
Chrysomya bezziana, also known as the Old World screwworm fly or screwworm, is an obligate parasite of mammals. Obligate parasitic flies require a host to complete their development. Named to honor the Italian entomologist Mario Bezzi, this fly is widely distributed in Asia, tropical Africa, India, and Papua New Guinea. The adult can be identified as metallic green or blue with a yellow face and the larvae are smooth, lacking any obvious body processes except on the last segment.
A genetically modified (GM) insect is an insect that has been genetically modified, either through mutagenesis, or more precise processes of transgenesis, or cisgenesis. Motivations for using GM insects include biological research purposes and genetic pest management. Genetic pest management capitalizes on recent advances in biotechnology and the growing repertoire of sequenced genomes in order to control pest populations, including insects. Insect genomes can be found in genetic databases such as NCBI, and databases more specific to insects such as FlyBase, VectorBase, and BeetleBase. There is an ongoing initiative started in 2011 to sequence the genomes of 5,000 insects and other arthropods called the i5k. Some Lepidoptera have been genetically modified in nature by the wasp bracovirus.
Inherited sterility in insects is induced by substerilizing doses of ionizing radiation. When partially sterile males mate with wild females, the radiation-induced deleterious effects are inherited by the F1 generation. As a result, egg hatch is reduced and the resulting offspring are both highly sterile and predominately male. Compared with the high radiation required to achieve full sterility in Lepidoptera, the lower dose of radiation used to induce F1 sterility increases the quality and competitiveness of the released insects as measured by improved dispersal after release, increased mating ability, and superior sperm competition.
Anastrepha ludens, the Mexican fruit fly or Mexfly, is a species of fly of the Anastrepha genus in the Tephritidae family. It is closely related to the Caribbean fruit fly Anastrepha suspensa, and the papaya fruit fly Anastrepha curvicauda.
Agenor Mafra-Neto is a chemical ecology researcher and entrepreneur in the entomological field of insect chemical ecology. He is the CEO of ISCA Technologies, a company specializing in the development semiochemical solutions for pest management, robotic smart traps and nanosensors. Dr Mafra-Neto is the CEO and Director of Research and Development at ISCA Technologies, Inc. which he founded in 1996 in Riverside, California. ISCA Tecnologias, Ltda was founded in Brazil in 1997.
Many species of flies of the two-winged type, Order Diptera, such as mosquitoes, horse-flies, blow-flies and warble-flies, cause direct parasitic disease to domestic animals, and transmit organisms that cause diseases. These infestations and infections cause distress to companion animals, and in livestock industry the financial costs of these diseases are high. These problems occur wherever domestic animals are reared. This article provides an overview of parasitic flies from a veterinary perspective, with emphasis on the disease-causing relationships between these flies and their host animals. The article is organized following the taxonomic hierarchy of these flies in the phylum Arthropoda, order Insecta. Families and genera of dipteran flies are emphasized rather than many individual species. Disease caused by the feeding activity of the flies is described here under parasitic disease. Disease caused by small pathogenic organisms that pass from the flies to domestic animals is described here under transmitted organisms; prominent examples are provided from the many species.
Walther Raúl Enkerlin Hoeflich is a Mexican entomologist, advocate, and pioneer researcher of the economics of applied sterile insect technique (SIT), currently based at the Joint Food and Agriculture Organization (FOA) and International Atomic Energy Agency (IAEA) Division.
Glossina morsitans is a species of tsetse fly in the genus Glossina. It is one of the major vectors of Trypanosoma brucei rhodesiense in African savannas.
{{cite journal}}
: CS1 maint: multiple names: authors list (link)