reduces efficiency of sheep and causes
a damaging hide condition called
"cockle". Lambs on high energy rations
in feedlots may not need treatments.
Several insecticides are registered
for use on these animals. Application
may be done by spraying, dusting, or
dipping.

BITING AND SUCKING LICE

 Sheep and goat lice cause:
- intense skin irritation, resulting
 in reduced quality and quantity
 of fleeces
- blood loss, resulting in anemia

 Life cycles take from 3-4 weeks.
Transmission is by contact with in-
fested animals. Insecticides applied
as dips, sprays, or dusts will provide
louse control.

SHEEP SCABIES


See under CATTLE SCABIES


NOSE BOT FLY.

 Living fly larvae are deposited
in the nostril opening of the sheep.
The larvae migrate to head sinuses,
where they develop. At maturity, they
migrate back down the nasal passages
and drop to the ground, where they
develop into adults. The life cycle
takes 6-12 months. Migration of the
larvae irritates the nasal membranes
and causes secondary infections.

 The presence of nose bots is
indicated by:
- blood flecks in the nasal mucus
- sheep banging their heads against
 feed bunks, fences, or the
 ground
No registered treatment is available


WOOL MAGGOT

 The wool maggot or black blow
fly lays eggs in dirty wool or on
wounds. After hatching, the fly
maggots spread over the animal and
feed on dead tissue under the fleece.
The life cycle takes 10-14 days.

 Fly infested sheep are restless.
They bite irritated areas, causing
fleece damage and wool loss. Early
shearing and medication of wounds
before blowfly season is an effective
preventative measure. Clipping and
cleaning of the fleece will help
prevent infestations. Insecticide
sprays, dins, or smears are effective
in controlling this pest.

 Swine

 Insects and related pests of
 swine include:


FLIES


 Refer to the section on these
under Cattle.

HOG LICE

 The presence of hog lice may be
indicated by excessive scratching and
rubbing. This causes reddening and
thickening of skin and results in
reduction of weight, particularly in
young pigs. Heavy infestations may
cause death.

 The hog louse is large enough
to be seen easily. It is found
primarily around the shoulders and
ears. Lice remain on the host at
all times. The life cycle is about
a month. Control hog lice with
dusts or sprays or with insecticide
granules applied to the bedding.