explain difference of external and internal feeders
internal feeders are insects that feed and develop entirely inside a kernel of grain, external develop outside kernel and are capable of eating whole and processed grains
Define stored product scavengers and secondary pests
scavengers only eat grains that have been processed or damaged by other insects, secondary infestations eat damaged grain that has rotted or moldy
What is a distinctive feature of most weevils
elongated proboscis (snout)
Identifying characteristics of a rice weevil
internal feeder, long and brown, 4 slash markings on outer corners of elytra
Describe angoumois grain moths
internal feeder, yellowish white with pale yellowish forewings
Describe a drugstore beetle
brown, elytra have distinct rows of pits, Antennae end wit a loose 3 segmented club, attracted to light and able to fly, external feeder
Describe an Indian meal Moth
wings are bicolored but have bronze or copper scales on outer half, adults are nocturnal, during the day they rest on surfaces with wings folded
Describe a cigarette beetle
long and brown with very smooth elytra in contrast to drugstore beetle, humpbacked appearance, antenna segments are serrate,
Describe dermestids
Carpet beetles, food on foods containing animal proteins, Oval shape, short clubbed antennae, head often hidden, often covered with scales
Describe saw toothed grain beetles
saw like notches on pronotum
Describe clothes moths
small, attack wool, furs cashmere, feathers, feed on desiccated bodies of dead rodents, do not readily fly, fun or scuttle
Explain difference between firebrats and silverfish
same except silverfish are uniformly silver and firebrats are mottled with gray and darker markings
Describe Psocids
booklice (not truly lice), minute, like moisture, easily distinguished from termite larva by swollen upper lip and two or three segmented tarsi
Define tarsus
Insect foot containing one to five segments