The adults are 0.1 inches long. This beneficial insect is a general
predator that is commonly found in grain storages. The nymphs and adults
of this beneficial insect prey on eggs, larvae, and pupae of many
species of grain insects, such as the red and confused flour beetle,
Indian meal moth and sawtoothed grain beetle. Its generation time is
about 16 days at 90 degrees F. Adult female longevity is five to six
weeks. The female produces approximately 150 eggs during her lifetime.
The Pirate Bug is a beneficial insect that is often found in stored
corn, but is not injurious to stored grain.
Foreign Grain Beetle
The adults are camel-brown and 0.1 inches long. It is similar to the
sawtoothed beetle, but can be distinguished by the lack of projections
on the middle body segment. Larvae are white to grayish white.
This insect is primarily a mold and fungus eater. Its presence may
indicate high grain moisture conditions. This insect is a minor pest of
The adults are flattened and red brownish in color and 1/12 inch long.
The antennae are relatively long, sometimes as long as the body. The
flat and rusty grain beetle look very similar. They cause similar
amounts of damage and their biology is similar, so it is not necessary
to distinguish between them.
The eggs are deposited on the grain. After hatching the larvae usually
feed in the germ layer of the wheat kernel. This insect does not cause
obvious feeding damage to grain that the weevils and lesser grain borers
do. This insect does not require broken kernels or fine material to
survive but will reproduce faster when it is present. It is the most
common insect pest of farm-stored wheat and frequently builds up to high
The adults are very flat, narrow, dark brown in color and 0.1 inch long.
They are recognized by the sawtooth projections on the sides of the
middle segment. Larvae are white to pale yellow and 0.1 inch at
maturity. They are similar to the merchant grain beetle in appearance
and habits. In the sawtoothed grain beetle the temple region behind the
eye is greater than 1/2 the eye diameter, in the merchant grain beetle
the space behind the eye is less than 1/2 the eye diameter.
The eggs are deposited on cracks in grain kernels. Adults and larvae
require fine material to survive and cannot feed on whole kernels. They
can build up to high numbers in stored grain. The merchant grain beetle
is rarely a pest of stored grain. The sawtooth grain beetle is a common
The adults of both the red and confused flour beetle are 0.1 inch long
and red in color. The red flour beetle is found much more frequently in
stored wheat than the confused flour beetle. The last 3 antennal
segments of the red flour beetle are abruptly larger, whereas they
gradually increase in size in the confused flour beetle. Larvae are 3/16
inch and have two horny projections on the end of the abdomen.
The adults reproduce faster when some fine material is present in the
grain. They can grow rapidly on undamaged grain, especially if the
moisture is above 12%. Grain with large numbers of these insects has a
pungent, undesirable odor. This insect is a fairly common pest of stored
This small, oval beetle is a common pest of many types of artifacts. The
adult is a tiny black beetle with white or lightly colored markings on
its back. The larvae are orange-brown in color and look hairy. Warehouse
beetles feed primarily on animal products, but will readily feed on
grain and cereal products. The hairs of the larvae can cause allergic
reactions in sensitive individuals especially when swallowed.
This beetle is a voracious feeder
and will feed on a wide variety of items including: seeds, dead animals,
cereals, corn, corn meal, nut meats, dried vegetables and plant material
and fish meal.
Life Cycle: The life cycle
from egg to adult can be completed in 43 days, but they can stay in
diapause (hibernation) for up to two years.
Trap Use and Placement:
The male Warehouse Beetle is extremely attracted to the pheromone Bullet
Lures. No Survivor traps are hung in areas where botanicals are stored.
Traps can be hung along a wall or placed on shelves or within drawers
where herbarium storage takes place.
This destructive insect is a serious
pest of dried plant material. It can also cause serious damage to books.
The Cigarette beetle is a small brown beetle measuring 2-3 mm in length.
The Cigarette beetle is closely related to the Drugstore beetle which
can cause difficulty in identification. However, with some training they
can be distinguished easily. The Cigarette beetle has wings covered in
small hairs whereas the Drugstore beetle's wings have rows of
Food: This beetle feeds on a great diversity of edible
and non edible products. They may infest stored food products such as
spices, rice, dry pet foods, as well as seeds, pharmaceuticals, and
books among many other materials. It is especially important as a pest
of tobacco products.
Life Cycle: Females lay the eggs in the larval food and hatch in
6 to 10 days. The larval period lasts 5 to 10 weeks. The pupal period
lasts 2 to 3 weeks. The entire life cycle takes about 10 to 12 weeks.
Adults live up to a month.
Trap Use and Placement: There are three trap designs
available for this beetle. No Survivor traps are hung in areas where
foods are stored, while the Serrico trap and Tobacco Beetle Trap can be
hung along a wall or placed on shelves with stored food or on the floor
in these areas. These traps should be protected from sunlight and wind
insect is also a common pest of dried plant matter. It can cause serious
damage to books and preserved plant material.
Life Cycle: Females lay the eggs one-by-one in the larval
food source. The larval period lasts from four to five months. The
cocoon lasts 12 to 18 days. The complete life cycle takes about seven
Trap use and Placement: This trap is currently
unavailable. Check with Insects Limited for future availability.
The adult is a dark brown to black beetle, 7 to 9 mm in length, with a
pale yellow six spotted band on the back of the abdomen. The
undersurface as well as the legs are covered with fine yellow hairs.
Food: Ham, bacon, meats, cheese, dried pet
foods, dried museum specimens of all kinds, stored tobacco, dried fish,
and all hides. The larvae seem to prefer fatty portions of meat rather
than lean muscular portions.
Life Cycle: Larder beetle females lay 100 - 175 eggs.
These eggs will hatch in 12 days or less. The larvae will eat constantly
until it molts. It will molt 5 - 6 times before pupating. Often times
the larvae will burrow into meat or even wood before it pupates. The
complete life cycle may be completed with 40 - 50 days.
Several types of weevils, including the rice,
granary, maize and bean/pea weevils, can be encountered in the home. They
are all pests of whole grain foods such as nuts, beans, cereals, fruits and
The true weevils (rice, granary and maize weevils) have a long snout on the
head. The rice weevil is about 3 mm long dark reddish brown, with four pale
spots on the upper surface. The rice weevil can fly and is attracted
to lights. The granary weevil is slightly larger (4 mm), of the same body
style and entirely dark chestnut-brown. It cannot fly and is not attracted
to lights. The maize weevil is also slightly larger than the rice weevil,
and it is very dark reddish-brown or black with four yellowish spots. All of
these weevils infest whole grain rice, barley, corn, wheat, popcorn,
sunflower seeds, nuts, beans and bird seed. They will also attack hard
cereal products such as macaroni, dry pet food, cereals and caked flour.
The larvae are white, legless, and feed inside of the whole kernel or seed -
hence they are rarely seen. Weevil
damaged grains typically are hollow and have small, round emergence holes.
The life cycle requires about 4 weeks and there may be three to five
generations per year.
The bean weevils are not true weevils; they are members of the closely
related bean weevil family. Their body shape is more round than the rice,
granary and maize weevils and they do not have the slender protruding snout
of these true weevils. The common bean weevil is about 1/8 inch (3 mm) long
with the upper surface mottled
shades of gray. These feed on dried beans, leaving perfectly round holes in
Very often, beans are harvested from the garden which look perfectly good.
However, there can be been weevil larvae present inside. These larvae can
continue to develop while the beans are in storage, with adults
emerging during winter. Many a housekeeper has been dismayed to find a good
supply of beans ruined by this
insect. Heating the beans to 130 degrees F for 1/2 hour prior to storage
will kill any larvae present and arrest
any further development. A small number of dried larvae in the beans does
not constitute any hazard to health.
Integrated Pantry Weevil Management
Purchase susceptible foodstuffs in quantities that can be used in a short
time: 2-4 months, if possible.
When purchasing packaged food, be certain the containers are not broken or
unsealed and that there are no signs of infestation. Check the packages for
freshness dates. Once food is in the home, use older packages before newer
ones, and opened ones before unopened ones. Storing dried foods in a freezer
will prevent insect development. Keep food storage and preparation areas
clean at all times; spilled and exposed food attracts insects.
If granary, rice or maize weevils are found in the kitchen, a search of all
possible food sources should
uncover the source of infestation. Disposal of infested grains and a
thorough cleanup of the area should
For bean weevil control, all that is required is to remove the infested
beans and clean up the storage area.
This pest does not infest as wide a range of stored goods and an insecticide
is not recommended.