Temperature and relative humidity profiles during heat treatment of mills and its efficacy against Tribolium castaneum (Herbst) life stages

Mahroof, Rizana; Subramanyam, Bhadriraju; Eustace, Dale

doi:10.1016/s0022-474x(02)00062-0

Cited by 94 publications

(47 citation statements)

References 13 publications

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“…There was no insect mortality in any of the tubes or piles. These results were consistent with published works related to insect mortality under different temperatures (Fields 1992;Mahroof et al 2003a;2003b;Roesli et al 2003). We would expect that insects would migrate from the hotter areas of the mill, equipment, and upper floors and seek refuge on the cooler concrete floor (Jian et al 2002).…”

Section: Temperature Inside Grain Masssupporting

confidence: 92%

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Measured and predicted temperatures in a grain processing building under heat treatment – 1. Temperature profiles during heat treatment

Jian¹,

Fields²,

Jayas

et al. 2012

Can. Biosyst. Eng.

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Temperature gradients in the vertical direction decreased with increasing height. The maximum and mean temperature gradients above the surface of the concrete floor, in the absence of grain, were 5.4°C/cm and 3.6±0.0°C/cm; respectively. The room temperatures at higher locations varied less than those at lower locations. Moreover, after the surface grain temperature reached 97% of its maximum temperature, it was influenced by the local temperature and periphery configuration. Key words: Heat treatment, grain-processing building, temperature.Le traitement thermique est une méthode efficace de lutte contre les insectes ravageurs dans les installations de transformation des céréales. Pendant un traitement thermique dans un entrepôt de farine, nous avons mesuré les températures ambiantes ainsi que celles du blé, de l'avoine, de farine de blé et de farine d'avoine, soit en tas ou en tubes de 0,15 m de hauteur, sur un plancher de béton à l'intérieur de l'entrepôt tout au long des 20 heures du traitement. Les températures ambiantes à divers endroits avaient la même distribution dans le sens vertical, malgré la présence de ventilateurs à différents endroits de la salle. Les gradients de température dans la direction verticale ont diminué avec la hauteur. Le maximum et la moyenne des gradients de température au-dessus de la surface du plancher de béton, sans grain, étaient de 5,4 °C / cm et 3,6 ± 0,0 °C / cm; respectivement. Les températures ambiantes aux endroits les plus élevés variaient moins que celles aux endroits moins élevés. De plus, après que la température du grain de surface ait atteint 97 % de sa température maximale, elle a été influencée par la température locale et la configuration périphérique. Mots clés: traitement thermique, installations de transformation des céréales, température.

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Section: Temperature Inside Grain Masssupporting

confidence: 92%

“…Time-temperature relationships play an important role in effective heat treatment for insect management (Mahroof et al 2003a;2003b). Effectiveness of this heat treatment process is determined by maintaining an air temperature between 50 to 60°C inside the entire building.…”

Section: Introductionmentioning

confidence: 99%

Measured and predicted temperatures in a grain processing building under heat treatment – 1. Temperature profiles during heat treatment

Jian¹,

Fields²,

Jayas

et al. 2012

Can. Biosyst. Eng.

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“…IR treatment increases cell temperature which increase egg mortality and inhibit egg hatching. Mahroof et al (2003) determined time-mortality relationships for eggs, neonate larvae, old larvae, pupae, and adults of the red flour beetle. Kirkpatrick (1975b) reported 493% egg mortality when wheat grain infested with rice weevils and lesser grain borers were exposure to infrared radiation at 43.38 ο C. Further, Kirkpatrick (1975a) suggested that eggs and early instars of the lesser grain borer and Angoumois grain moth were more resistant to infrared treatments than eggs and early instars of rice weevils.…”

Section: Effect Of Ir Ray On 24 Hours Old Eggs Of S Cerealellamentioning

confidence: 99%

Effect of non-catalytic infrared ray on the grain moth Sitotroga cerealella (lepidoptera: gelechiidae)

Abdullah¹,

Elwi²,

Ali³

et al. 2017

JEBAS

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This study was conducted under laboratory conditions to find out the effect of the non-catalytic infrared on the mortality rates and development of various stages of the grain moth Sitotroga cerealella. Result of the study revealed that treated eggs, first and fourth instars, pupae and adults mortality increased by increasing non-catalytic infrared waves exposure time from 40 and 60 seconds at 40 and 50 ο C. Highest egg mortality (56.7%) and hatching period (6.1 days) was reported on the exposure of 60 seconds at 50 ο C while the lowest values 3.3% and 4.5 days respectively was reported for the control treatments. Similar conditions were reported for the first and fourth instars, pupae and adults mortality. Infrared waves exposure for 60 seconds at 50 ο C significantly influenced the development of S. cerealella and showed 53.31% first stage larval mortality, 50% fourth stage larval mortality, 46.7% pupal mortality and 66.7% adult mortality. Furthermore, it was reported that infrared wave did not have any negative effect on the seed germination and 60 second exposure at 50 ο C showed 96 percent seeds germination.

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“…Management of insects in food-processing facilities is important to prevent adulteration of finished products. Several tactics that are recommended for management of insects associated with food-processing facilities include stock rotation, inspection of inbound and outbound materials, sanitation, exclusion practices, fumigation with sulfuryl fluoride or methyl bromide, use of heat treatments (Mahroof et al 2003, Boina et al 2008, crack and crevice treatments with residual insecticides (Toews et al 2005(Toews et al , 2009, and the use of aerosols or fogs. A lot of research has been done documenting the effectiveness of whole structure treatments with fumigants and heat treatments, and limited information is available on efficacy of the other chemical and non-chemical (sanitation) insect management tactics.…”

Section: Introductionmentioning

confidence: 99%

Insect Management with Aerosols in Food-Processing Facilities

Boina¹,

Subramanyam²

2012

Insecticides - Advances in Integrated Pest Management

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Temperature and relative humidity profiles during heat treatment of mills and its efficacy against Tribolium castaneum (Herbst) life stages

Cited by 94 publications

References 13 publications

Measured and predicted temperatures in a grain processing building under heat treatment – 1. Temperature profiles during heat treatment

Measured and predicted temperatures in a grain processing building under heat treatment – 1. Temperature profiles during heat treatment

Effect of non-catalytic infrared ray on the grain moth Sitotroga cerealella (lepidoptera: gelechiidae)

Insect Management with Aerosols in Food-Processing Facilities

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