
TY  - JOUR
A1  - Stone, BF 
A1  - Meyers, RAJ 
T1  - Dieldrin-resistant cattle ticks, <I>Boophilus microplus</I> (Canestrini) in Queensland
JF  - Australian Journal of Agricultural Research
JO  - Aust. J.  Agric. Res.
Y1  - 1957
VL  - 8
IS  - 3
SP  - 312
EP  - 317
KW  - 
UR  - https://doi.org/10.1071/AR9570312 
N2  - Infestation by cattle ticks in a herd a t Mt. Gravatt, near Brisbane, in southern Queensland, could not be controlled by repeated spraying of the cattle with 0.05 per cent. w/v dieldrin. Ninety-eight per cent. of engorged females of this strain, which fell from an artificially infested beast in the 48 hr following spraying with 0.05 per cent. w/v dieldrin, laid normal batches of viable eggs. Spraying cattle with 0.05 per cent. w/v "Diazinon", however, readily controlled infestation by this strain. Laboratory concentration-response tests on a culture of the dieldrin-resistant ticks indicated that the median lethal concentration of dieldrin for the larvae was over 2000 times higher than for those of a reference strain. There was also strong evidence from laboratory tests of dieldrin resistance in the engorged adult female ticks. 
ER  -

