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1.Antenna- 4 segmented club 6.Thorax- almost straight CONFUSED FLOUR BEETLE 1.Antenna- 4 segmented club 6.Thorax- almost straight CONFUSED FLOUR BEETLE
2.Eyes 7.Petiole- none 2.Eyes 7.Petiole- none
3.Head 8.Abdomen- oval, flattened 6 8 3.Head 8.Abdomen- oval, flattened 6 8
4.Legs- 6 9.Color- red-brown 4.Legs- 6 9.Color- red-brown
5.Wings- under elytra 10.Other- never observed flying 5.Wings- under elytra 10.Other- never observed flying
Life Cycle Life Cycle
The female will lay 400-500 eggs on or near the products they infest, The female will lay 400-500 eggs on or near the products they infest,
laid at a rate of 2-3 per day. In 1-2 weeks they hatch into larvae, which laid at a rate of 2-3 per day. In 1-2 weeks they hatch into larvae, which
go through 5 to 12 instars which take from one to four months to com- go through 5 to 12 instars which take from one to four months to com-
plete their cycle. Four to five generations can be produced in one year. 4 plete their cycle. Four to five generations can be produced in one year. 4
Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR
CONFUSED FLOUR BEETLE CONFUSED FLOUR BEETLE
Actual size 1/8” Actual size 1/8”
One of the most important pests of stored food products, this beetle will eat grain products, One of the most important pests of stored food products, this beetle will eat grain products,
nuts, peas, beans, spices, tobacco, dried fruits, and other organic materials. The adults are nuts, peas, beans, spices, tobacco, dried fruits, and other organic materials. The adults are
about 1/8th inch in size, and are reddish-brown colored. The name comes from original confu- about 1/8th inch in size, and are reddish-brown colored. The name comes from original confu-
sion in identifying this pest. It has a four-segmented club that is not easily visible, unlike other sion in identifying this pest. It has a four-segmented club that is not easily visible, unlike other
flour beetles. flour beetles.

RED FLOUR BEETLE CONFUSED FLOUR BEETLE RED FLOUR BEETLE CONFUSED FLOUR BEETLE
EYES ARE SPACED EYES ARE SPACED RED FLOUR BEETLE EYES ARE SPACED EYES ARE SPACED RED FLOUR BEETLE
CLOSER TOGETHER FURTHER APART CLOSER TOGETHER FURTHER APART

Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR
1.Antenna- 3 segmented club 6.Thorax- almost straight RED FLOUR BEETLE 1.Antenna- 3 segmented club 6.Thorax- almost straight RED FLOUR BEETLE
2.Eyes 7.Petiole- none 2.Eyes 7.Petiole- none
3.Head 8.Abdomen- oval, flattened 6 8 3.Head 8.Abdomen- oval, flattened 6 8
4.Legs- 6 9.Color- red-brown 4.Legs- 6 9.Color- red-brown
5.Wings- under elytra 10.Other- never observed flying 5.Wings- under elytra 10.Other- never observed flying
Life Cycle Life Cycle
About 400-500 eggs will be laid on or near the products these beetles infest, About 400-500 eggs will be laid on or near the products these beetles infest,
being laid at a rate of 2-3 per day. In 1-2 weeks they will hatch into larvae, being laid at a rate of 2-3 per day. In 1-2 weeks they will hatch into larvae,
which then go through 5 to 12 instars, taking from one to four months to which then go through 5 to 12 instars, taking from one to four months to
complete the larval cycle. Four to five generations can be produced in one year, 4 complete the larval cycle. Four to five generations can be produced in one year, 4
and it can live for up to three years. and it can live for up to three years.
Photo Courtesy of UNIVAR Photo Courtesy of UNIVAR
RED FLOUR BEETLE Actual size 1/8” RED FLOUR BEETLE Actual size 1/8”

A major pest of store food products both in grocery stores and in the home, infesting grain A major pest of store food products both in grocery stores and in the home, infesting grain
products, nuts, dried fruits, peas, beans, spices, and other organic materials. Only about 1/8 th products, nuts, dried fruits, peas, beans, spices, and other organic materials. Only about 1/8
th
inch in size, it is almost identical to the Confused Flour beetle, but prefers warmer climates. It inch in size, it is almost identical to the Confused Flour beetle, but prefers warmer climates. It
will spread much more rapidly than the Confused Flour beetle. will spread much more rapidly than the Confused Flour beetle.

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