Toxicity of insecticides to adult australian plague locust, chortoicetes terminifera (orthoptera: acrididae)
1976
Edge, V. E. | Casimir, M.
Fenitrothion and malathion are the standard insecticides used in the aerial spraying of swarms of Australian plague locust, Chortoicetes terminifera, in New South Wales. The toxicities of these and 11 other insecticides to adult C. terminifera were determined by topical application. Phoxim (LD50 0.6 μg/g) was the most effective insecticide, being 6.6 × more toxic than fenitrothion (LD50 4.0 μg/g) and 33 × more toxic than malathion. Compared to fenitrothion 5 other insecticides were significantly more toxic at the LD50 level: chlorpyrifos (2.8 ×), diazinon (1.8 ×), arprocarb (1.7 ×), and the synthetic pyrethroids, ethanochrysanthemate (2.5 ×) and cismethrin (2.0 ×), Bioresmethrin and the photostable pyrethroid permethrin (NRDC 143) were 0.5–0.8 × and 0.4 × as toxic respectively as fenitrothion. The synergist piperonyl butoxide increased the efficacy of bioresmethrin and permethrin by 3.9 × and 8.2 × respectively.
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