Abstract This study examines the effect of semolina, cracked wheat, maize flour, cracked maize, whole oat flakes, whole barley flour and cracked barley on the developmental and reproductive biology of the saw-toothed grain beetle, Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae). The pest completed its development at all tested commodities except semolina and cracked wheat, while females did not produce eggs on maize flour and cracked barley. The developmental time of larvae was significantly longer when O. surinamensis fed on whole oat flakes (20.3 days) and whole barley flour (19.2 days) compared with maize flour (16.6 days) or cracked maize (17.2 days). The developmental duration of larvae fed on cracked barley (18.3 days) did not differ significantly when fed on cracked maize or whole barley flour, but it was significantly longer compared to maize flour and significantly shorter compared to whole oat flakes. The tested commodities did not affect the pupal development, which ranged between 4.6 and 4.7 days. The highest fecundity was recorded when O. surinamensis fed on cracked maize (4.8 eggs/female) and whole oat flakes (0.3 eggs/female). The tested commodities also affected the risk of death of O. surinamensis and its mean survival time. The shortest survival time was recorded on cracked wheat (11.1 days) while the longest was on cracked maize and whole oat flakes (37.8 and 42.2 days, respectively). The calculation of demographic parameters was feasible only on cracked maize. The net reproductive rate, the intrinsic rate of increase, the finite rate of increase and the mean generation time were 1.48 females/female, 0.01 females/female/day, 1.01 and 37.1 days, respectively. These results may be useful for improving the knowledge on the biology of this species and its potential spread.

中文翻译：

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Oryzaephilus surinamensis (L.) (Coleoptera: Silvanidae) 在七种商品上的发育和生殖生物学

摘要 本研究考察了粗粒小麦粉、碎小麦、玉米粉、碎玉米、全燕麦片、全大麦粉和大麦碎对锯齿状甲虫 Oryzaephilus surinamensis (L.) (Coleoptera) 发育和生殖生物学的影响。 : Silvanidae)。该害虫在除粗面粉和破碎小麦外的所有测试商品上均已发育完成，而雌性在玉米粉和破碎大麦上不产卵。与玉米粉（16.6 天）或碎玉米（17.2 天）相比，当 O. surinamensis 以全燕麦片（20.3 天）和全大麦粉（19.2 天）为食时，幼虫的发育时间显着延长。当饲喂破碎的玉米或全麦粉时，饲喂破碎大麦的幼虫的发育持续时间（18.3 天）没有显着差异，但它与玉米粉相比明显更长，与全燕麦片相比明显更短。测试商品不影响蛹发育，在4.6到4.7天之间。当 O. surinamensis 以破碎的玉米（4.8 个鸡蛋/雌性）和全燕麦片（0.3 个鸡蛋/雌性）为食时记录到最高的繁殖力。受试商品也影响了O. surinamensis的死亡风险及其平均存活时间。碎小麦的存活时间最短（11.1 天），而碎玉米和全燕麦片的存活时间最长（分别为 37.8 和 42.2 天）。人口统计参数的计算仅适用于破碎的玉米。净繁殖率、内在增长率、有限增长率和平均世代时间分别为1.48只雌性/雌性，0.01只雌性/雌性/天，分别为 1.01 和 37.1 天。这些结果可能有助于提高对该物种生物学及其潜在传播的认识。