Movement of &lt;I&gt;Tribolium castaneum&lt;/I&gt; (Coleoptera: Tenebrionidae) Adults in Response to Temperature Gradients in Vertical and Horizontal Wheat and Corn Columns

Jian, Fuji; Jayas, Digvir S.; White, N. D. G.

doi:10.1603/0022-0493-98.4.1413

Cited by 22 publications

(11 citation statements)

References 14 publications

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“…Tribolium spp. have the ability to move to preferred temperature conditions within the mill (Graham 1958, Jian et al 2005, and there is considerable temperature variation within a mill (J.F.C., unpublished data), so it is unknown what the speciÞc environmental conditions were for the different subpopulations within the mill. Second, temperature can impact beetle capture efÞ-ciency, because beetle mobility is correlated with temperature (Surtees 1965) and the volatility of the attractants in the traps also is related to temperature.…”

Section: Discussionmentioning

confidence: 99%

Long-Term Monitoring of Tribolium castaneum in Two Flour Mills: Seasonal Patterns and Impact of Fumigation

Campbell¹,

Toews²,

Arthur³

et al. 2010

112

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Data from long-term Tribolium castaneum (Herbst) pheromone trapping programs in two flour mills was used to evaluate the impact of structural fumigations (n = 23) on pest populations. The two mills differed in mean number of beetles captured and proportion of traps with captures of one or more beetles, but in one of the mills the mean number of beetles captured was reduced after implementing a more intensive integrated pest management program. Mean number of beetles per trap and proportion of traps with captures increased by 52.7 +/- 8.2 and 24.8 +/- 4.7% from one monitoring period to the next but decreased by 84.6 +/- 4.6 and 71.0 +/- 5.1% when fumigation occurred between periods, respectively. Mean number of beetles per trap and proportion of traps with captures immediately after fumigation were both positively correlated with number captured per trap and proportion of traps with captures in the monitoring period immediately before fumigation. Mean daily air temperature inside the mill fluctuated with the season, and although always warmer than the outside temperature, the relative difference varied with season. Relationship between inside and outside temperature could be explained well by an exponential equation with the parameters a = 20.43, b = 2.25, and c = -15.24 (r2 = 0.6983, which is 94% of the maximum r2 obtainable). Although outside temperature differed between spring and fall fumigations, inside temperature and reduction in beetle captures was not affected by season. A better understanding of pest populations and the impact of structural treatments within commercial food facilities is critical for improving the management of pest populations and for the adoption of methyl bromide alternatives.

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Section: Discussionmentioning

confidence: 99%

Long-Term Monitoring of Tribolium castaneum in Two Flour Mills: Seasonal Patterns and Impact of Fumigation

Campbell¹,

Toews²,

Arthur³

et al. 2010

112

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“…Additionally, when vials were located at places close to the door, the ßoor temperature would be lower than the air temperature because of heat lost through conduction of the ßoor; a similar phenomenon may occur where vials were placed on metal surfaces (Jian et al 2012b). In case of vials placed close to heaters or near fans blowing hot air, higher temperatures may have forced insects to burrow deep into the ßour (Jian et al 2005). Adding (at location 4 and 17) and deducting (at locations 8, 20, and 21) 5ЊC to the measured temperature can make the MRE value at these locations smaller than 0.01 and the residuals smaller than Ϯ10%.…”

Section: Results and Discussion Validation Using Laboratory Data At Cmentioning

confidence: 99%

Models to Predict Mortality of Tribolium castaneum (Coleoptera: Tenebrionidae) Exposed to Elevated Temperatures During Structural Heat Treatments

et al. 2013

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Novel thermal death models were developed with certain assumptions, and these models were validated by using actual heat treatment data collected under laboratory conditions at constant temperatures over time and in commercial food-processing facilities where temperatures were dynamically changing over time. The predicted mortalities of both young larvae and adults of the red flour beetle, Tribolium castaneum (Herbst), were within 92-99% of actual measured insect mortalities. There was good concordance between predicted and observed mortalities of young larvae and adults of T. castaneum exposed to constant temperatures in laboratory growth chambers and at variable temperatures during structural heat treatments of commercial food-processing facilities. The models developed in this study can be used to determine effectiveness of structural heat treatments in killing young larvae and adults of T. castaneum and for characterizing insect thermotolerance.

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“…The red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae), is an economically important insect pest of stored products in the world [26,33]. Adults of T. castaneum move inside stored grain bulks and respond to temperature gradients [3,13,16,19,[36][37][38][39] and different habitats [23,28,43]. There is no report on the temporal distribution of T. castaneum in grain bulks.…”

Section: Introductionmentioning

confidence: 99%

Three Dimensional Temporal and Spatial Distribution of Adults of Tribolium castaneum (Coleoptera: Tenebrionidae) in Stored Wheat Under Different Temperatures and Adult Densities

Jian

Larson²,

Jayas

et al. 2012

Agric Res

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Three dimensional temporal and spatial distributions of adults of Tribolium castaneum (Herbst) at insect densities of 0.1 (low), 1.0 (medium), and 5.0 (high) adults/kg wheat (A/kg) were determined in a 1.5 t bin of wheat with 11 ± 0.8%, 13 ± 0.6% and 15 ± 0.3% moisture contents (wet basis) at 20 ± 1, 25 ± 1 and 30 ± 1°C. The 1.5 t of wheat was sampled at five locations. At each location, grain was separated into three 15 kg vertical layers and adult numbers in each layer were counted. Adults did not prefer any location in the horizontal direction, while fewer adults were recovered from the bottom layers than that from the top and middle layers. Number of adults at a location with any temperature or insect density did not correlate with its adjacent locations in either vertical or horizontal direction. The temporal continuous property existed at all insect densities. These results were consistent with the tendency of the aggregation of the adults at the low and medium densities. Adults had highly clump distributions at low and medium densities and this aggregation behavior decreased with the increase of insect densities. Temperature tested did not influence their aggregation behavior.

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Movement of <I>Tribolium castaneum</I> (Coleoptera: Tenebrionidae) Adults in Response to Temperature Gradients in Vertical and Horizontal Wheat and Corn Columns

Cited by 22 publications

References 14 publications

Long-Term Monitoring of <I>Tribolium castaneum</I> in Two Flour Mills: Seasonal Patterns and Impact of Fumigation

Long-Term Monitoring of <I>Tribolium castaneum</I> in Two Flour Mills: Seasonal Patterns and Impact of Fumigation

Models to Predict Mortality of <I>Tribolium castaneum</I> (Coleoptera: Tenebrionidae) Exposed to Elevated Temperatures During Structural Heat Treatments

Three Dimensional Temporal and Spatial Distribution of Adults of Tribolium castaneum (Coleoptera: Tenebrionidae) in Stored Wheat Under Different Temperatures and Adult Densities

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