Longheaded flour beetle Latheticus oryzae Fig 517b

Adults are about 3 mm long, and the body is yellowish brown, slender, and somewhat flattened. Eggs are deposited individually on the food surface; hatching occurs in about 3 days at 40 °C, and 10 days at 25 °C. Humidity does not influence the incubation time, buthighhumidity reduces hatch. Larval development is 15 days at 35 °C and 85% RH; 17 days at 40 °C and 85% RH, and 95 days at 25 °C. The pupal period ranges from 3 days at 40 °C to 10 days at 25 °C. Minimum temperature for development is 25 °C, and a combination of 35 °C and 85% RH is optimum. This species is a cosmopolitan pest of wheat, rice, maize, barley, rye, and cereal products.

Palembus dermestoides (Fig. 5.l7d) Adults are 5.7-6.2 mm long and blackish brown. The head is prominent and antennae have broad segments, which are moderately asymmetrical. This species is considered pantropical. It is associated with maize, cornmeal, wheat flour, oats, rice bran, peanuts, nuts, yeasts, and bread. It has been reared and used as an oriental medicine.

Palembus ocularis (Fig. 5.17e) Adults are 3.4-4.3 mm long and blackish brown. The pronotum is broad and head partly concealed. Distribution is pantropical, but it also occurs in the USA (Florida). It is associated with maize, oats, wheat, fishmeal, yeasts, various fruits (banana), and okra.

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