Genetic Relationships Among Florida &lt;I&gt;Diaprepes abbreviatus&lt;/I&gt; (Coleoptera: Curculionidae) Populations

Baş, Berna; Dalkiliç, Zeynel; Peever, Tobin L.; Nigg, H. N.; Simpson, S. E.; Gmitter, F. G.; Adair, Robert C.

doi:10.1603/0013-8746(2000)093[0459:grafda]2.0.co;2

Cited by 14 publications

(15 citation statements)

References 29 publications

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“…Shapiro et al (1999) found that early DRW larval instars were more susceptible to nematode infection than late instars, a feature that could enhance the effects of nematodes on invasion speed. Despite this potential, the large-scale spatial dynamics of the DRW invasion in Florida, as well as its introduction to Texas and California, are thought to be dominated by human-mediated movement of infested plant material, with natural dispersal playing a relatively small role (Bas et al 2000). While local management might effectively reduce local spread, these efforts must be combined with efforts to prevent ''inflation'' of the dispersal kernel caused by human commerce.…”

Section: Implications Of Perturbation Results For Drw Managementmentioning

confidence: 99%

“…The weevil subsequently spread throughout peninsular Florida. Human movement of infested plant material is thought to have played a major role in its statewide spread dynamics (Bas et al 2000). Current DRW management practices in Florida include biological control targeted at eggs (parasitic wasps) and larvae (entomopathogenic nematodes); entomopathogenic fungi that target adults are also being explored (Grafton-Cardwell et al 2004).…”

Section: Focal Speciesmentioning

confidence: 99%

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Contributions of demography and dispersal parameters to the spatial spread of a stage‐structured insect invasion

Miller

Tenhumberg

2010

Ecological Applications

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Abstract. Stage-structured models that integrate demography and dispersal can be used to identify points in the life cycle with large effects on rates of population spatial spread, information that is vital in the development of containment strategies for invasive species. Current challenges in the application of these tools include: (1) accounting for large uncertainty in model parameters, which may violate assumptions of ''local'' perturbation metrics such as sensitivities and elasticities, and (2) forecasting not only asymptotic rates of spatial spread, as is usually done, but also transient spatial dynamics in the early stages of invasion. We developed an invasion model for the Diaprepes root weevil (DRW; Diaprepes abbreviatus [Coleoptera: Curculionidae]), a generalist herbivore that has invaded citrusgrowing regions of the United States. We synthesized data on DRW demography and dispersal and generated predictions for asymptotic and transient peak invasion speeds, accounting for parameter uncertainty. We quantified the contributions of each parameter toward invasion speed using a ''global'' perturbation analysis, and we contrasted parameter contributions during the transient and asymptotic phases. We found that the asymptotic invasion speed was 0.02-0.028 km/week, although the transient peak invasion speed (0.03-0.045 km/week) was significantly greater. Both asymptotic and transient invasions speeds were most responsive to weevil dispersal distances. However, demographic parameters that had large effects on asymptotic speed (e.g., survival of early-instar larvae) had little effect on transient speed. Comparison of the global analysis with lower-level elasticities indicated that local perturbation analysis would have generated unreliable predictions for the responsiveness of invasion speed to underlying parameters. Observed range expansion in southern Florida (1992Florida ( -2006 was significantly lower than the invasion speed predicted by the model. Possible causes of this mismatch include overestimation of dispersal distances, demographic rates, and spatiotemporal variation in parameter values. This study demonstrates that, when parameter uncertainty is large, as is often the case, global perturbation analyses are needed to identify which points in the life cycle should be targets of management. Our results also suggest that effective strategies for reducing spread during the asymptotic phase may have little effect during the transient phase.

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Section: Implications Of Perturbation Results For Drw Managementmentioning

confidence: 99%

Section: Focal Speciesmentioning

confidence: 99%

Contributions of demography and dispersal parameters to the spatial spread of a stage‐structured insect invasion

Miller

Tenhumberg

2010

Ecological Applications

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“…The RAPD technique (Williams et al ., 1990) has been widely used to elucidate the geographical origin of, and gene flow among, insect populations (e.g. Vandewoestijne & Baguette, 2002; Ayres et al ., 2003), including curculionid weevils (Williams et al ., 1994; Armstrong & Wratten, 1996; Taberner et al ., 1997; Bas et al ., 2000; Scataglini et al ., 2000). It has proved to be a very efficient and sensitive method for obtaining genetic markers for many different kinds of organisms, demanding no prior information about genomic organization.…”

Section: Introductionmentioning

confidence: 99%

Genetic structuring of boll weevil populations in the US based on RAPD markers

Kim

Sappington

2004

Insect Molecular Biology

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Randomly amplified polymorphic DNA (RAPD) analysis was performed to infer the magnitude and pattern of genetic differentiation among boll weevil populations from eighteen locations across eight US states and north-east Mexico. Sixty-seven reproducible bands from six random primers were analysed for genetic variation within and between weevil populations. Genetic and geographical distances among all populations were positively correlated, reflecting a pattern of isolation by distance within a larger metapopulation. Gene flow between south-central, western and eastern regions is limited, but migration between locations within regions appears to be relatively frequent up to distances of ∼300-400 km. However, estimates of effective migration were much lower than those estimated from mtDNA-RFLP data reported previously.

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“…Since its discovery in 1964, D. abbreviatus has spread to 20 counties in Florida and currently infests Ϸ66,420 ha (Anonymous 1997). D. abbreviatus may have been introduced to Florida on three occasions (Bas et al 2000). The weevil is an important economic pest of citrus and difÞcult to manage (Hall et al 2001).…”

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confidence: 99%

Sampling Methods as Abundance Indices for Adult <I>Diaprepes abbreviatus</I> (Coleoptera: Curculionidae) in Citrus

Nigg¹,

Simpson²,

Hall³

et al. 2002

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Beat sampling and two type of traps, cup traps and Tedders traps, were evaluated as sampling methods to detect and estimate population densities of adult Diaprepes abbreviatus L. weevils newly colonizing young citrus trees. The study was conducted over a 65-wk period across a 0.25-ha area of 80 citrus trees [Citrus sinensis (L.) Osbeck] (1.2-1.5 m tall). Beat samples were taken weekly to determine the number of trees infested and number of new adult weevils per tree. Sixteen of the 80 trees studied were each monitored weekly using one of the following trapping methods: cup traps in trees, cup traps on a stake in the ground within the tree drip line, cup traps on a stake in the ground outside of the drip line, Tedders traps on the ground within the drip line, and Tedders traps on the ground outside of the drip line. Weevils collected each week from trees and traps were removed from the study site. Based on the coefficients associated with Taylor's power law, the optimum numbers of trees to sample for an SEM equal to 25% of the mean estimate decreased from 50 trees at a mean of 0.5 new weevils per tree to 30 trees at a mean of 0.8 new weevils per tree. A significant relationship was found between the weekly mean number of new weevils per tree and the proportion of trees infested, a binomial relationship that could be further explored in the search for a sampling program for adult D. abbreviatus. Regression analyses indicated that three of the trapping methods served at least as weak indices of the presence and abundance of new weevils: cup traps in trees, Tedders traps inside the dripline and Tedders traps outside the dripline. Cup traps in trees and Tedders traps inside the dripline captured the most weevils and most frequently detected weevils. Although relatively inefficient as abundance indices of populations of new weevils, these two trapping methods appeared to have some value with respect to signaling when weevils first appeared in trees during the spring.

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Genetic Relationships Among Florida <I>Diaprepes abbreviatus</I> (Coleoptera: Curculionidae) Populations

Cited by 14 publications

References 29 publications

Contributions of demography and dispersal parameters to the spatial spread of a stage‐structured insect invasion

Contributions of demography and dispersal parameters to the spatial spread of a stage‐structured insect invasion

Genetic structuring of boll weevil populations in the US based on RAPD markers

Sampling Methods as Abundance Indices for Adult <I>Diaprepes abbreviatus</I> (Coleoptera: Curculionidae) in Citrus

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