Toxicity of Insecticides to Papaya Mealybug Parasitoid, <I>Acerophagus papayae</I> (Noyes and Schauff) (Hymenoptera: Encyrtidae)

P. Sakthivel; P. Karuppuchamy; M. Kalyanasundaram; T. Srinivasan

doi:10.18311/jbc/2012/3504

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Authors

P. Sakthivel
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 00, Tamil Nadu ,IN
P. Karuppuchamy
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 00, Tamil Nadu ,IN
M. Kalyanasundaram
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 00, Tamil Nadu ,IN
T. Srinivasan
Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 00, Tamil Nadu ,IN

DOI:

https://doi.org/10.18311/jbc/2012/3504

Keywords:

Toxicity, Insecticides, Acerophagus papayae.

Abstract

Toxicity of selected insecticides to papaya mealybug parasitoid, Acerophagus papayae (Noyes and Schauff) (Hymenoptera: Encyrtidae) was evaluated at 1, 3, 6 and 24h after treatment (HAT). Results showed that Thiamethoxam, Chlorpyriphos and Dichlorvos showed very high knock-down effect (100 % mortality) of A. papayae adults within 3 HAT. Fish Oil Rosin Soap (FORS) and Neem oil had very less detrimental effect on adult parasitoids by recording very low mortality percentage at 24 HAT. The residual toxicity data revealed that Thiamethoxam was the most persisting insecticide causing 26.67 per cent mortality of A. papayae even after 28 days after treatment (DAT). Neem oil and Fish Oil Rosin Soap became less or non toxic to adults of A. papayae at three DAT.