Call for Submission of Research Proposals for a new FAO/IAEA Coordinated Research Project (CRP) on Assessment of Simultaneous Application of SIT and MAT to Enhance Bactrocera Fruit Fly Management
The SIT, which is an environment-friendly technique, involves the mass-rearing of male insects, sterilizing them by ionizing radiation and releasing them in the target area in numbers large enough to outcompete their wild counterparts. Sterile male matings with wild females result in no off-spring and the release of sterile males in adequate sterile to wild male over-flooding ratios suppresses the wild population in the targeted area. In certain cases, this population suppression can lead to eventual eradication of the target population. Furthermore, as the SIT acts in an inverse density dependent manner, it becomes more effective when the wild population is reduced.
The male annihilation technique (MAT) has been used to suppress Bactrocera pest species as part of an integrated pest management approach, and even successfully applied to eradicate populations in some isolated situations such as islands or after recent outbreaks. Integration of the MAT with the SIT has so far been sequential, rather than simultaneous, with the SIT applied after a significant reduction of the wild population with the MAT; the reason being to avoid the mass-trapping of the released sterile males in the lured traps with the semiochemical methyl eugenol, which would significantly reduce the efficacy of the SIT.
The objective of the new CRP is to explore the potentially synergistic relationship between MAT and SIT when applied simultaneously to dramatically improve the efficacy of Bactrocera fruit fly management. The assessment of semiochemicals to enhance Bactrocera spp. SIT application against these pest fruit flies will include:
· The development of cost-effective semiochemical treatments and delivering systems that improve sterile male sexual performance and reduce their response to MAT formulations so that MAT and SIT can be integrated simultaneously.
· Assessment of the effect of exposure of selected Bactrocera pest species to semiochemicals on earlier sexual maturation and improved male sexual performance, as well as reduced response of exposed sterile males to MAT traps.
· Evaluation of key parameters in large field cages such as degree of lure response of sterile flies, sterile to wild over-flooding ratio, wild fly sex ratio and bisexual release to determine their influence on the effectiveness of simultaneous MAT and SIT application.
· Field evaluation of simultaneous MAT and SIT within a pilot or operational setting that includes compatible management practices.
The CRP will address all factors that should allow the simultaneous and effective application of SIT and MAT to enhance Bactrocera fruit fly management:
· Determine the minimum amount of semiochemical required by males to reduce their lure response for a significant portion of their lifetime in the field.
· Establish the best means to confirm that adequate semiochemical delivery has been achieved physiologically, including analysis of haemolymph, rectal gland contents, and pheromone composition.
· Establish the means to minimize responsiveness to traps
· Identify alternative semiochemicals for pre-release treatment, but recognizing that the best lure for a particular fruit fly species may not be the best semiochemical for pre-release treatment.
· Compare the mating age and behavior of males fed semiochemicals only or in combination with other pre-release treatments (e.g., methoprene, dietary supplements).
· Determine whether pre-release treatments of fruit flies diminish their performance, such as survival, flight, dispersal, and mating ability.
· Determine the best means of semiochemical delivery that is compatible with existing fly emergence and release systems.
· Establish the relative field response of different fruit fly species to male lures using standardized protocols.
The expected duration of the CRP is 5 years (2019–2023) and the first Research Coordination Meeting is planned for 15–19 July 2019 in Vienna, Austria.
Scientist and researchers who are interested in collaborating in this new CRP should contact Carlos Cáceres (C.E.Caceres-Barrios@iaea.org) or Rui Cardoso Pereira (R.Cardoso-Pereira@iaea.org). Information on the IAEA Coordinated Research Programme and how to apply for research contracts and research agreements can be found at http://cra.iaea.org/. Applications should be submitted by 31 October 2018 to email@example.com.