Predictability of Stored-Wheat Insect Population Trends from Life History Traits

Hagstrum, David W.; Throne, James E.

doi:10.1093/ee/18.4.660

Cited by 34 publications

(7 citation statements)

References 10 publications

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“…combinações, se ocorresse reumedecimento, seria o mesmo e os grãos de todos os tratamentos poderiam atingir a umidade máxima de 13% e, por outro lado, esta variação na umidade relativa não é significativa para o crescimento populacional (Kawamoto et al, 1992;Hagstrum & Throne, 1989;Hagstrum & Flinn, 1992). Adotou-se este intervalo de temperaturas porque ele representa as temperaturas predominantes no clima brasileiro; além disso, contém a faixa de temperaturas ótimas para o desenvolvimento da espécie S. zeamais, 28 a 30 °C (Hwang et al, 1983;Throne, 1994).…”

Section: Methodsunclassified

“…A temperatura do ar ambiente, que é o ar intergranular no caso de um sistema de grãos armazenados, e a umidade do grão, são os fatores físicos importantes no estabelecimento e desenvolvimento de uma população de insetos pragas de grãos armazenados (Kawamoto et al, 1992;Hagstrum & Throne, 1989;Hagstrum & Flinn, 1992). Considerando-se o sistema formado por grãos armazenados, trata-se de um sistema altamente controlado.…”

Section: Introductionunclassified

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Modelos analíticos do crescimento populacional de Sitophilus zeamais em trigo armazenado

Silva¹,

Faroni²,

Guedes³

et al. 2006

Rev. bras. eng. agríc. ambient.

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RESUMOPara se atingir os objetivos propostos neste trabalho, desenvolveram-se modelos analíticos do crescimento populacional de S. zeamais em grãos de trigo armazenados com teor de umidade de 11,1%. O crescimento populacional foi avaliado durante 90 dias de armazenagem, nas temperaturas de 16, 20, 24, 28, 32 e 36 °C, partindo-se de infestações iniciais que variaram de 1,3 a 9,3 insetos por kg de trigo. Os modelos explicaram de 93,9 a 98,9% da variação na densidade populacional. O crescimento populacional foi afetado pelo tamanho da população que iniciou a infestação, ou seja, quanto maior foi a infestação inicial maior também foi o crescimento populacional ao longo do tempo de armazenagem, que ocorreu na temperatura de 28 °C e diminuiu drasticamente abaixo e acima desta. Na temperatura de 36 °C, todas as populações foram extintas entre 15 e 45 dias de armazenagem, mas nenhuma população se extinguiu a 16 °C. Os modelos apresentaram excelentes ajustes, estando em conformidade com os princípios gerais da dinâmica de populações de insetos em um sistema de grãos armazenados e descrevem muito bem o crescimento populacional de S. zeamais em relação ao efeito da temperatura e da densidade populacional inicial. Palavras-chave: grãos, insetos, infestação, temperaturaAnalytical models for population growth of Sitophilus zeamais in stored wheat ABSTRACTAnalytical models of population growth were developed for Sitophilus zeamais, in grain wheat stored at 11.1% of moisture content. Population growth was monitored for 90 days at the temperatures of 16, 20, 24, 28, 32 and 36 °C and initial adult population densities varying between 1.3 and 9.3 insects per kg. The models obtained explained between 93.9 and 98.99% of the variation in density of adult insects. The population growth was affected by initial population density of infestation and increased proportionately with degree of infestation. The highest population growth occurred at 28 °C and drastically decreased for lower and higher temperatures. Population extinction took place between 15 and 45 days of storage for all samples maintained at 36 °C, but no extinction was observed at 16 °C. The models obtained present excellent adjustments and are in agreement with general principles underlying the pest-storage system; they reproduce very well the general effect of temperature and initial population densities upon S. zeamais population growth.

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Section: Methodsunclassified

Section: Introductionunclassified

Modelos analíticos do crescimento populacional de Sitophilus zeamais em trigo armazenado

Silva¹,

Faroni²,

Guedes³

et al. 2006

Rev. bras. eng. agríc. ambient.

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“…Temperature and grain moisture content are major influences on the developmental time and egg production of stored grain insects (Hagstrum and Throne, 1989). Sinha and Watters (1985) gave the limits for the successful development of 5. zeamais as 17 and 34 °C, but there is little information available on the lethal effects of high and low temperatures.…”

Section: Biology and Ecology Of Some Storage Insect Pests Of Cereal Gmentioning

confidence: 99%

Storage insect pests of cereal in small scale farming community and their control

Allotey

1991

Int. J. Trop. Insect Sci.

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The small scale farming communities own and store much of the cereals they produce. Various aspects of the infestation problem encountered with insect pests of stored cereals have been examined to illustrate the current status of the pest. Reduction of food losses could be effected during producer, consumer and export storage. However, effective management of pest species requires thorough knowledge of the biology and the ecosystem they inhabit. The current management strategies directed against these pests have been examined. Resume*-Les petites echelles communautes agriculture possedent et emmagasinent beaucoup de cereales qu'elles produisent. Divers aspects des problemes d'infestation recontraient avec les insectes nuisibles des cereales emmagasinees etaient examines pour illustrer le statutcourant de l'insecte nuisible. Reduction des pertes de la nourriture pouvait effectuee pendant emmagasinage de producteur, emmagasinage de consommateur et emmagasinage pour exportation. Cependant administration efficace des especes nuisibles demandent connaissance approfondie de la biologie et l'ecosysteme qu'elles habitent. Les strategies courantes d'administration dirigees contre ces insectes nuisible etaient examinees.

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“…Different mathematical models and statistical techniques have been applied for the interpretation of the population outcome of stored-product insects [38][39][40][41][42][43]. Several studies have shown that feeding on different types of commodities can affect the demography of stored-product insect pests such as the life history traits, the survival or duration of larvae and the intrinsic rate of increase [33,35,[44][45][46][47][48][49].…”

Section: Introductionmentioning

confidence: 99%

Biological Features and Population Growth of Two Southeastern European Tribolium confusum Jacquelin du Val (Coleoptera: Tenebrionidae) Strains

Kavallieratos

Andrić

Golić

et al. 2020

Insects

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A study of the biological features and the potential population growth between two laboratory strains of the confused flour beetle, Tribolium confusum Jacquelin du Val (Coleoptera: Tenebrionidae) from Greece and Serbia is conducted on cracked barley and cracked white rice. The results show that, at a species level, T. confusum is able to complete development on cracked barley but not on cracked white rice. Therefore, cracked white rice proves to be an unsuitable commodity for T. confusum. Larval development on cracked barley is significantly shorter for the Serbian compared to the Greek strain (37.7 and 49.7 days, respectively), but pupal development does not differ between the two strains (6.2 days for both strains). Additionally, male longevity does not differ between the Greek and Serbian strains (144.4 and 151.4 days, respectively), while female longevity is significantly shorter for the Serbian (151.7 days) compared to the Greek strain (186.6 days). Fecundity does not differ between the two strains (11.3 and 17.7 eggs/female for the Greek and the Serbian strain, respectively), whilst survival is higher for the Serbian strain on both tested commodities. The values of the net reproductive rate, the intrinsic rate of increase and the finite rate of increase on cracked barley are significantly higher for the Serbian (7.27 females/female, 0.025 female/female/day and 1.026, respectively) compared to the Greek strain (2.91 females/female, 0.014 females/female/day and 1.014, respectively). It therefore is expected that different strains of T. confusum may exhibit variable phenology as well as potential population growth. Additionally, we expect our results to have bearing on the management of this species.

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Predictability of Stored-Wheat Insect Population Trends from Life History Traits

Cited by 34 publications

References 10 publications

Modelos analíticos do crescimento populacional de Sitophilus zeamais em trigo armazenado

Modelos analíticos do crescimento populacional de Sitophilus zeamais em trigo armazenado

Storage insect pests of cereal in small scale farming community and their control

Biological Features and Population Growth of Two Southeastern European Tribolium confusum Jacquelin du Val (Coleoptera: Tenebrionidae) Strains

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