Prickly Pear Eradication.
Early in 1934, 50, 000 eggs of Cactoblastis cactorum, Berg, were introduced into South Australia from Queensland [cf. R.A.E., A 25 298, etc.] for the control of Opuntia monocantha (smooth tree pear), but, although the larvae were fairly plentiful in August, none was to be found by October 1935. Dactylopius ceylonicus, Green (indicus, Green) [cf. 22 380], which was also introduced from Queensland early in 1934, became successfully established, and by February 1936 it had become very effective in destroying 0. monocantha.