The Comparative Bionomics of American Cryptolestes1 (Coleoptera-Cucujidae) that Infest Stored Grain23

Effects of Noncatastrophic Control Technologies that Alter Life History Parameters on Insect Population Growth: A Simulation Study

“…I chose this species for the study because there are more quantitative data describing its biology than are available for most other stored-product insects and because the biology and duration of life stages of C. pusillus are typical of many holometabolous (Bishop 1959). Eggs usually are laid in cracks in the grain and hatch in 3.5 d. Larvae feed on the grain, and the larval stage lasts 17.9 d, The non-feeding prepupal stage lasts 3.2 d at 30 0 e and 90% RH (Davies 1949).…”

“…Eggs usually are laid in cracks in the grain and hatch in 3.5 d. Larvae feed on the grain, and the larval stage lasts 17.9 d, The non-feeding prepupal stage lasts 3.2 d at 30 0 e and 90% RH (Davies 1949). The pupal stage lasts 4.4 d at 32,2°e and 90% RH (Bishop 1959), Males and females feed on grain. Males live 98 d at 32.5°e and 90% RH (Bishop 1959).…”

“…The pupal stage lasts 4.4 d at 32,2°e and 90% RH (Bishop 1959), Males and females feed on grain. Males live 98 d at 32.5°e and 90% RH (Bishop 1959). Sixty-three percent of females start laying eggs within 4 d after emerging at 25°e and 75% RH (Davies 1949), Females live 138 d at 32.5°C and 90% RH (Bishop 1959) and lay 226.8 eggs during the first 12 wk of adult life at 30 0 e and 90% RH (Currie 1967),…”

Dominance and Frequency of Coleoptera Found on Stored Cereals and Cereal Products in Central Greece

“…Otyzaephilus surinamensis and Otyzaephilus mercator proportionally seem to be more balanced in terms of population in all 4 different Rooms being more numerous in the flour mill, in which case the incident must also be related to these species' feeding preferences (Howe 1956). The highest Cryptolestesfemtgineus population (66%) was found in the flour mill (Table 1), mainly in flour and bran although the insect is capable of infesting products of higher moisture content such as damaged seeds and has generally obtained a great adaptability to varius humidity levels (Bishop 1959). On the contrary, 67% of the total number of Rhysoperlha dominica individuals was found inside Room 1, where cereal seeds were stored over a long period of time.…”

Occurrence of Nosema oryzaephili in Cryptolestes ferrugineus and transfer to the genus Paranosema

“…Microscopic examination revealed that many of the beetles from these colonies were infected with a Nosema-like microsporidium. There are no reports, to our knowledge, of Microsporidia infecting C. ferrugineus despite the fact that the beetle has been extensively studied, occurs throughout the world, infests many commodities, and is the most abundant insect in northern grain stores (Bishop, 1959). We conducted bioassays on several granivorous insects to clarify the physiological host range within the guild and to confirm its identity.…”