Factors Influencing Stored-oat Insect Populations in South Dakota

Ingemansen, J. A.; Reeves, D. L.; Walstrom, R. J.

doi:10.1093/jee/79.2.518

Cited by 19 publications

(11 citation statements)

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“…On high-moisture diets, RGB larvae use less of the food to maintain the water content of their body and can use more for growth than when they are on low-moisture diets. Their population levels remained constant from 8% to 11% moisture content of stored oat in South Dakota (Ingemansen et al 1986). At a moisture level >11%, the average insect density increases with an increased moisture, while highest densities are found at moisture levels >13%.…”

Section: Development Requirements Of Rgbmentioning

confidence: 91%

Detecting and Responding to Resource and Stimulus during the Movements of Cryptolestes ferrugineus Adults

Jian

Jayas

2008

Food Bioprocess Technol

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An understanding of insect movement and distribution within grain bulks is essential to effectively control insect pests. The aim of this review was to (1) identify the major and minor factors influencing the movement of adults of Cryptolestes ferrugineus and to (2) analyze their ability of resource detecting and cue orienting. Their response to major and minor environmental factors was related with the general features of the grain storage environment, their development requirement, and their ability of cue orienting and detecting. Their movement inside stored grain bins and in small-scale chambers was compared. Incompleteness of our current knowledge regarding their movement and cue detection under multi-factors is the main reason why we cannot predict yet their dispersal and distribution inside granaries accurately.

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Section: Development Requirements Of Rgbmentioning

confidence: 91%

Detecting and Responding to Resource and Stimulus during the Movements of Cryptolestes ferrugineus Adults

Jian

Jayas

2008

Food Bioprocess Technol

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“…Ahasverus advena and T. stercorea are primarily fungus feeders. About 50% of samples from oats stored for p1 yr were infested with insects, with average densities of about 30/kg (Ingemansen et al, 1986). Insect density generally increased as moisture content increased above 11% (Ingemansen et al, 1986).…”

Section: Introductionmentioning

confidence: 99%

“…Stored oats are susceptible to infestation by a number of insect pests (Ingemansen et al, 1986). Residual insecticides are used to protect stored oats from damage by insect pests, but alternatives to insecticides are desirable because of the development of resistance by insects to insecticides and regulatory restrictions on use of insecticides (Arthur, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…[flat grain beetle, C. pusillus (Sch . onherr); and rusty grain beetle, Cryptolestes ferrugineus (Stephens) (Coleoptera: Laemophloeidae)]; the sawtoothed grain beetle, Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae); the red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae); the foreign grain beetle, Ahasverus advena (Waltl) (Coleoptera: Silvanidae); and the hairy fungus beetle, Typhaea stercorea (L.) (Coleoptera: Mycetophagidae) (Horton, 1982;Storey et al, 1983;Ingemansen et al, 1986). Cryptolestes ferrugineus, C. pusillus, O. surinamensis, and T. castaneum are considered to be secondary pests of grain; i.e., they are unable to infest intact kernels, and they usually feed and develop outside of grain kernels.…”

Section: Introductionmentioning

confidence: 99%

“…About 50% of samples from oats stored for p1 yr were infested with insects, with average densities of about 30/kg (Ingemansen et al, 1986). Insect density generally increased as moisture content increased above 11% (Ingemansen et al, 1986). Sinha (1969Sinha ( , 1971 reported that the oat hull provided resistance to storage insect pests, including primary pests (i.e., those pests that can damage intact kernels and that can feed and develop within grain kernels); Vicar, a hulless oat, was the most susceptible cultivar.…”

Section: Introductionmentioning

confidence: 99%

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Susceptibility of commercial oat cultivars to Cryptolestes pusillus and Oryzaephilus surinamensis

Throne

Doehlert

McMullen

2003

Journal of Stored Products Research

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Throne, James E.; Doehlert, Douglas C.; and McMullen, Michael S., "Susceptibility of commercial oat cultivars to Cryptolestes pusillus and Oryzaephilus surinamensis" (2003 onherr) and Oryzaephilus surinamensis (L.)] of eight commercial oat cultivars from the United States was determined in laboratory studies. Duration of insect development was shorter and number of progeny produced was greater on cracked than on whole oats. Simulations based on data from the study showed that insect populations would reach the threshold level for treatment in 2-3 months of storage at 301C on cracked oats. Insect population development was slowest on the hulless cultivar Paul when the oat kernels were cracked. Simulations also indicated that all cultivars of whole oats tested could be stored for at least 1 yr at 301C without reaching the threshold for treatment when infested with these two species of insects, and insect populations would decrease over time on the cultivars Don, Jerry, Milton, NewDak, Otana, and Valley. Analyses of oat grain quality characteristics, including kernel weight, groat hardness, and groat composition, provided little insight into the mechanism of observed differences in insect development among cultivars. Hardness of the kernels (as indicated by % broken groats after dehulling) may be related to near immunity to these two species of insects in whole Otana. Steaming whole oats to inactivate hydrolytic enzymes in the trichomes of the pericarp did not increase susceptibility to these two species of insects, suggesting that enzymes in the trichomes were not responsible for insect population development being slower on whole oats than on cracked oats. Although we were unable to identify the factors that determined relative susceptibility in this study, the results will be useful for selecting commercial oat cultivars for planting that will be less susceptible to insect pests in storage and suggest that the economics of

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