41 



(Bigley et al., 1 960 ) . Sprays of 0.25 and 0.5% ronnel effectively con- 

 trolled field populations of northern fowl mites (K.raemer, 1959; Khan, 

 1969). Good control was also provided with dusts of 1 and 5% ronnel 

 (Knapp and Krause, I960; Foulk and Matthysse, 1963).* 

 Miscellaneous compounds 



Other compounds, mostly organophosphorous compounds, giving good 

 northern fowl mite control are coumaphos (Bay 21/199) sprays and dusts 

 (Kraemer, 1959; Hoffman, I960; Knapp and Krause, I960; Foulk and 

 Matthysse, 1963: Khan, 1969), stirofos (SD 8447) sprays and dusts 

 (Furman and Lee, 1969; Nelson et al., 1969; Combs et al., 1976; 



Christensen et al., 1977), dichlorvos sprays and impregnated resin 



TM 

 strands (Khan, 1969; Nelson et al., 1969), crotoxyphos (Ciodrin or 



TM 

 SD 4294) mist sprays (Foulk and Matthysse, 1963), trichlorfon (Dylox ) 



sprays (Khan, I969), naled sprays (Kraemer, 1959), ch lord imeform sprays 



(Hall et al., 1975; Combs et al., 1976; Christensen et al., 1977), and 



neotran end sulphenone sprays and dusts (Furman, 1953; Furman et al., 



1953). 



Py rethro i ds 



Pyrethrum dust has been used with good results on poultry for 



northern fowl mite control (Cameron, 1938). Two synthetic pyrethroids , 



TM 

 Ectiban and SD 43775, gave good results in laboratory studies. In 



the field, effective control was achieved for 57 days with concentra- 

 tions of SD 43775 ranging from 0.0125 to 0.05% (Hall et al., 1978). 

 Mechanical controls 



The two compounds briefly mentioned here are included only because 

 they present alternate methods for mite control although the efficacy 



