Feeding substrate and temperature interplay determining infestations and losses by the sawtoothed grain beetle (Oryzaephilus surinamensis) |
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| Affiliation: | 1. Stored Product Pests Research Department, Plant Protection Research Institute, Agricultural Research Center, Sakha, Kafr El-Sheikh, Egypt;2. Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, 36570-000, Brazil;3. Economic Entomology Department, Faculty of Agriculture, Damietta University, Damietta, Egypt;1. Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region, Institute of Entomology, Guizhou University, Guiyang, 550025, PR China;2. Guizhou Provincial Key Laboratory for Rare Animal and Economic Insect of the Mountainous Region, College of Biology and Environmental Engineering, Guiyang University, Guiyang, 550005, PR China;3. China Tobacco Guizhou Industrial Co., LTD, Guiyang, 550025, PR China;1. Bolu Abant Izzet Baysal University, Faculty of Agriculture, Department of Seed Science and Technology, Bolu, Turkey;2. Iğdır University, Faculty of Agriculture, Department of Field Crops, Iğdır, Turkey;1. Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Phytokou str., 38446, Nea Ionia, Magnesia, Greece;2. The BioRobotics Institute, Sant’ Anna School of Advanced Studies, Viale Rinaldo Piaggio 34, 56025, Pontedera, Pisa, Italy;3. Healthcare Engineering Innovation Center (HEIC), Khalifa University, Abu Dhabi, United Arab Emirates;4. Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, Pisa, Italy;5. Department of Excellence in Robotics & A.I., Sant’Anna School of Advanced Studies, 56127, Pisa, Italy;1. The Scientific and Technological Research Council of Turkey (TUBITAK), Food Institute, 41470, Gebze, Kocaeli, Turkey;2. Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Phytokou Str., 38446, N. Ionia, Magnesia, Greece;3. Plant Protection Department, Faculty of Agriculture, Ankara University, 06110, Ankara, Turkey |
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| Abstract: | Sawtoothed grain beetle, Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae), is a secondary pest of stored products and one of the serious insect pests of cereal grains, commodities and packaged food throughout the world. However, this species is a concern beyond cereal grains, what may be differentially affected by temperature. Therefore, insect developmental time, larva and pupa survival, and adult emergence of O. surinamensis were assessed on different substrates (rice, sesame and date palm) at different temperatures (20, 25, 30 and 35 °C and 65% r.h). The substrate loss incurred by this insect infestation was also recorded. The larval stage was the main determinant for the overall developmental time of the sawtoothed grain beetle, regardless of the substrate and temperature tested. Adult emergence was affected by substrate (F2,48 = 4.50, P = 0.02) and particularly temperature (F3,48 = 24.94, P < 0.001), but not their interaction (F6,48 = 0.40, P = 0.87), exhibiting little variation until reaching 30 °C, but with a quick decline at 35 °C. The performance of the insects in rice was better, and worse in dry date. Furthermore, the survival was inversely related to substrate loss, regardless of the substrate used for rearing the sawtoothed grain beetle. Thus, substrate and temperature range are major determinants of sawtoothed grain beetle infestation with consequences for this species management. |
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| Keywords: | Food preferences Non-grain commodities Biological traits Temperature Substrate loss |
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