All the infestation at the edges of these spots must be destroyed.
The infestation of markets by this species has been described above.
The skull of no. 34677 shows no infestation of the frontal sinuses by parasites.
The frontal sinuses of the type are malformed as a result of infestation by parasites.
It is sometimes, in calves, a symptom of infestation with worms.
Where the infestation is considerable, fumigation with sulphur is advisable.
The infestation of the sprayed plots was probably about 30 to 40 per cent.
When the infestation is only moderate, this latter method is not advised, owing to the lateness of the time of horse-hoeing.
When the infestation is in only a few spots in the field, the remedy is to cover with straw, soak with kerosene oil, and burn.
None of the skulls examined shows malformation of the frontal sinuses such as results from infestation by parasites in some races.