Medfly (Diptera:Tephritidae) Genetic Sexing: Large-Scale Field Comparison of Males-Only and Bisexual Sterile Fly Releases in Guatemala

Rendón, Pedro; McInnis, Donald O.; Lance, D. R.; Stewart, James McD.

doi:10.1603/0022-0493-97.5.1547

Cited by 255 publications

(212 citation statements)

References 16 publications

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“…This corresponds with the large-scale field comparison between males-only and bisexual sterile fly releases in Guatemala [38]. Releasing only sterile males instead of both males and females is therefore considered a better (and effective) strategy.…”

Section: Initial Infestationsupporting

confidence: 59%

Modelling the effects of the sterile insect technique applied to Eldana saccharina Walker in sugarcane

Potgieter¹,

Vuuren²,

Conlong³

2012

ORiON

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A mathematical model is formulated for the population dynamics of an Eldana saccharina Walker infestation of sugarcane under the influence of partially sterile released insects. The model describes the population growth of and interaction between normal and sterile E.saccharina moths in a temporally variable, but spatially homogeneous environment. The model consists of a deterministic system of difference equations subject to strictly positive initial data. The primary objective of this model is to determine suitable parameters in terms of which the above population growth and interaction may be quantified and according to which E.saccharina infestation levels and the associated sugarcane damage may be measured. Although many models have been formulated in the past describing the sterile insect technique, few of these models describe the technique for Lepidopteran species with more than one life stage and where F1-sterility is relevant. In addition, none of these models consider the technique when fully sterile females and partially sterile males are being released. The model formulated is also the first to describe the technique applied specifically to E.saccharina, and to consider the economic viability of applying the technique to this species. Pertinent decision support is provided to farm managers in terms of the best timing for releases, release ratios and release frequencies.

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Section: Initial Infestationsupporting

confidence: 59%

Modelling the effects of the sterile insect technique applied to Eldana saccharina Walker in sugarcane

Potgieter¹,

Vuuren²,

Conlong³

2012

ORiON

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“…Female-specific lethality would be advantageous for several reasons connected with facilitating separation of the sexes (Dyck et al, 2005). Release of only males, rather than both males and females, has been shown to make the SIT much more effective (Rendón et al, 2004). The efficiency of releases is improved because the released males have to seek out wild females; if both sexes were released there would be potential for assortative matings among the released sterile males and females and this would reduce the effect on control of the natural population.…”

Section: Introductionmentioning

confidence: 99%

Modeling resistance to genetic control of insects

Alphey

Bonsall

Alphey

2011

Journal of Theoretical Biology

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The sterile insect technique is an area-wide pest control method that reduces pest populations by releasing mass-reared sterile insects which compete for mates with wild insects. Modern molecular tools have created possibilities for improving and extending the sterile insect technique. As with any new insect control method, questions arise about potential resistance. Genetic RIDL ® technology (Release of Insects carrying a Dominant Lethal) is a proposed modification of the technique, releasing insects that are homozygous for a repressible dominant lethal genetic construct rather than being sterilized by irradiation. Hypothetical resistance to the lethal mechanism is a potential threat to RIDL strategies' effectiveness. Using population genetic and population dynamic models, we assess the circumstances under which monogenic biochemically-based resistance could have a significant impact on the effectiveness of releases for population control. We assume that released insects would be homozygous susceptible to the lethal genetic construct and therefore releases would have a built-in element of resistance dilution. We find that this effect could prevent or limit the spread of resistance to RIDL constructs; the outcomes are subject to competing selective forces deriving from the fitness properties of resistance and the release ratio. Resistance that is spreading and capable of having a significant detrimental impact on population reduction is identifiable, signaling in advance a need for mitigating action.

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“…This is inefficient because the released sterile females and males tend to court and mate with each other rather than seeking out wild mates. Male‐only releases are generally more efficient than mixed sex releases, a large‐scale study of irradiated Medfly quantified this as being three‐ to five‐fold more efficient per male (Rendón et al ., 2004). Early removal of females (eggs or early larval instars) in the generation destined for release also potentially saves on rearing costs as only the males need to be housed and fed.…”

Section: Sterile Insect Methodsmentioning

confidence: 99%

Genetics‐based methods for agricultural insect pest management

Alphey

Bonsall

2017

Agri and Forest Entomology

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The sterile insect technique is an area‐wide pest control method that reduces agricultural pest populations by releasing mass‐reared sterile insects, which then compete for mates with wild insects. Contemporary genetics‐based technologies use insects that are homozygous for a repressible dominant lethal genetic construct rather than being sterilized by irradiation.Engineered strains of agricultural pest species, including moths such as the diamondback moth Plutella xylostella and fruit flies such as the Mediterranean fruit fly Ceratitis capitata, have been developed with lethality that only operates on females.Transgenic crops expressing insecticidal toxins are widely used; the economic benefits of these crops would be lost if toxin resistance spread through the pest population. The primary resistance management method is a high‐dose/refuge strategy, requiring toxin‐free crops as refuges near the insecticidal crops, as well as toxin doses sufficiently high to kill wild‐type insects and insects heterozygous for a resistance allele.Mass‐release of toxin‐sensitive engineered males (carrying female‐lethal genes), as well as suppressing populations, could substantially delay or reverse the spread of resistance. These transgenic insect technologies could form an effective resistance management strategy.We outline some policy considerations for taking genetic insect control systems through to field implementation.

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Medfly (Diptera:Tephritidae) Genetic Sexing: Large-Scale Field Comparison of Males-Only and Bisexual Sterile Fly Releases in Guatemala

Cited by 255 publications

References 16 publications

Modelling the effects of the sterile insect technique applied to Eldana saccharina Walker in sugarcane

Modelling the effects of the sterile insect technique applied to Eldana saccharina Walker in sugarcane

Modeling resistance to genetic control of insects

Genetics‐based methods for agricultural insect pest management

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