Jalaluddin, M., & Mohanasundaram, M. 1989a Residual toxicity of four insecticides recommended for control of coconut coccids on the parasitoid fauna of Opisina arenosella Wlk.. Entomon 14(3-4): 199-202.

Notes: The toxicity of methomyl, dimethoate, methyl-parathion [parathion-methyl] and fish oil rosin soap at 0.025, 0.03, 0. 05 and 2.5%, resp., to Trichospilus pupivora, Tetrastichus israeli, Eriborus trochanteratus and Bracon hebetor, parasitoids of the xyloryctid Opisina arenosella, was tested in the laboratory. The relative toxicity to E. trochanteratus was parathion-methyl > methomyl > dimethoate > soap, while for the other parasitoids it was parathion-methyl > dimethoate > methomyl > soap. The toxicity of soap persisted for up to 1 day for Trichospilus pupivora, 6 days for Tetrastichus israeli and 2 days for E. trochanteratus and B. hebetor. Methomyl was toxic for 7-13 days and dimethoate for 9-14 days. No species given for coccids.