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Table 2 Result from a pilot study including 5 herds that were treated to eradicate lice in December 1993.

From: Eradication of Lice in Cattle

Herd

Size (no. dairy cows)

Herd characteristic

Lice infestations before medication

Medicament

Lice present after medication

     

March 1994

March 1995

March 1996

A

25

Open herd: Purchasing livestock Using common pasture

D. bovis L. vituli

Flumethrin

No lice

No lice

No lice

B

16

Closed herd

D. bovis

Deltamethrin

No lice

No lice

No lice

C

10

Open herd: Using common pasture

D. bovis

Deltamethrin

No lice

D. bovis

D. bovis

D

20

Open herd: Purchasing livestock

L. vituli

Deltamethrin

No lice

No lice

No lice

E

40

Open herd: Purchasing livestock

D. bovis L. vituli

Flumethrin

No lice

No lice

D. bovis L. vituli