Modelos analíticos do crescimento populacional de Sitophilus zeamais em trigo armazenado

Silva, Arienilmar A. L. da; Faroni, L. R. D.; Guedes, Raul Narciso C.; Martins, José Helvecio; Pimentel, M. A. G.

doi:10.1590/s1415-43662006000100023

Cited by 3 publications

(1 citation statement)

References 12 publications

(18 reference statements)

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“…1b). Similarly, SILVA et al (2006) found that the population growth of S. zeamais in wheat seeds was affected by the population size that initiated infestation, so the greater the initial infestation, the greater the population growth during storage at 28 °C. Also, by the number of seeds infested verified, no seeds with injuries or presence of S. zeamais were observed in the treatment without infestation, indicating that there was no seed attack by this pest before the installation of the experiment (Fig.…”

Section: Resultsmentioning

confidence: 90%

Storage of corn seeds infested by weevil

et al. 2021

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Weevil is one of the main pests of stored corn. The adults feed on intact and broken seeds or bran, while the larvae develop by feeding on the inside of the seeds, resulting in a reduction in weight and physiological quality. The objective of this study was to evaluate the effects of Sitophilus zeamais infestation on corn seeds during storage. Corn seeds were infested using insect densities: 0, 36, 72, 108, and 144 individuals per 240 g of seeds. The infested seeds were placed in individualized plastic containers and covered with voile fabric. The seeds were stored for 60 days under laboratory conditions with an average temperature of around 27 °C and relative humidity of 85%. Initially and every 15 days of storage for 60 days, the seeds were evaluated using the parameters: number of S. zeamais individuals, total number of infested seeds, seed weight loss, germination test and seedling emergence in the tray. The population increase of S. zeamais causes a decrease on the physical and physiological quality of stored corn seeds, but the deterioration rate does not increase in the same proportion as the weevil population growth rate.

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Section: Resultsmentioning

confidence: 90%

Storage of corn seeds infested by weevil

et al. 2021

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Características físico-químicas de grãos de milho atacados por Sitophilus zeamais durante o armazenamento

Antunes

Viebrantz

Gottardi

et al. 2011

Rev. bras. eng. agríc. ambient.

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RESUMOO objetivo do trabalho foi avaliar os danos físicos e químicos causados por insetos adultos da espécie Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae), criação própria sob condições controladas (25±5 °C e 60±10% UR), em grãos de milho híbrido (Zea mays L.) AS-32, oriundos de lavoura experimental, durante três períodos de armazenamento: 30, 60 e 120 dias. O experimento ocorreu nas mesmas condições e foi constituído de quatro repetições de 600 g de grãos com 150 insetos para cada tratamento. As análises realizadas também com o produto "in natura" foram: umidade, perda de peso dos grãos, peso de 1000 grãos, tecnológica de defeitos, extrato etéreo, proteína bruta e variação populacional (emergência, mortalidade e sobrevivência dos insetos). No maior período avaliado (120 dias) ocorreram as maiores perdas de peso, presença de grãos carunchados, grau de umidade, variação populacional e menor peso de 1000 grãos e extrato etéreo. Pode-se concluir, com base nesses resultados, que quanto maior o período de contato dos insetos com os grãos maiores são os danos causados e os prejuízos para os produtores.Palavras-chave: perda de peso, extrato etéreo, proteína, gorgulho-do-milho Physicochemical characteristics of corn damaged by Sitophilus zeamais during storage ABSTRACT The objective of present study was to evaluate the physical and chemical damage caused by the adult insects of the species Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae), self creation under controlled conditions (25 ± 5 °C and 60 ± 10% RH) in grains of hybrid maize (Zea mays L.) AS-32, collected from an experimental farm for three storage periods: 30, 60 and 120 days. The experiment was conducted under the same conditions and consisted of four repetitions of 600 g of grain with 150 insects for each treatment. The analysis also performed with the product "in natura" were: moisture, weight loss of grain, 1000 grain weight, technological defects, ether extract, crude protein and population variation (emergence, mortality and survival of insects). The longest study period (120 days) showed the largest weight loss, presence of insect attacked grains, moisture content, population variation, and lower 1000 grain weight and lipids. One can conclude, based on these results, that the greater the contact period of insects with grains, the greater the damage and losses to farmers.

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Avaliação de dano de Sitophilus zeamais, Oryzaephilus surinamensis e Laemophloeus minutus em grãos de arroz armazenados

Copatti¹,

Marcon²,

Machado³

2013

Rev. bras. eng. agríc. ambient.

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RESUMOObjetivou-se com o presente trabalho avaliar o efeito de predação de inseto praga primário, Sitophilus zeamais, e secundários, Oriza ephilus surinamensis e Laemophloeus minutus em grãos de arroz armazenados. As populações foram expostas a condições controladas de temperatura e fotoperíodo (20, 25 e 30 ºC, 14 h de fotofase) em cinco diferentes densidades de infestação (10, 20, 40, 80 (0, 10, 20, 40, 80 and 120 individuals). The treatments were: S. zeamais isolated; O. surinamensis isolated; L. minutus isolated; S. zeamais + O. surinamensis and; S. zeamais + L. minutus. Analysis of rice grain damage occurred at 7 and 14 days after the beginning of the experiments, separating the insect pests from the grains. The largest losses occurred with increasing temperature and infestation density and the coexistence of S. zeamais + L. minutus produced the greatest predatory effects. It is concluded that lower temperatures as well as monitoring and control of infestation of primary and secondary insect pests reduces the loss of rice grains stored.

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Modelos analíticos do crescimento populacional de Sitophilus zeamais em trigo armazenado

Cited by 3 publications

References 12 publications

Storage of corn seeds infested by weevil

Storage of corn seeds infested by weevil

Características físico-químicas de grãos de milho atacados por Sitophilus zeamais durante o armazenamento

Avaliação de dano de Sitophilus zeamais, Oryzaephilus surinamensis e Laemophloeus minutus em grãos de arroz armazenados

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