Journal of Entomological Research

SCOPUSWeb of Science
  • Year: 2023
  • Volume: 47
  • Issue: suppl

Efficacy of some promising insecticides against adults of papaya mealy bug, Paracoccus marginatus Williams and Granara de Willink (Hemiptera: Pseudococcidae) under laboratory condition

  • Author:
  • Swastika Gogoi, Mousumi Phukon*, Inee Gogoi, Partha Pratim Gyanudoy Das, Ratul Kr. Borah
  • Total Page Count: 6
  • Page Number: 944 to 949

Department of Entomology, Assam Agricultural University, Jorhat-785 013, Assam, India

Abstract

The study revealed thiamethoxam 25 WG as the most effective insecticide at a concentration of 0.05% with the highest mortality (83%) and lowest LC50 value recorded at 48 h after treatment followed by imidacloprid SL against Paracoccus marginatus. The toxicity order with respect to concentration was recorded as thiamethoxam 25 WG (0.004%) > imidacloprid 17.8 SL (0.005%) > profenofos 50 EC (0.006%) > chlorantraniliprole SC (0.007%) > spiromesifen 22.9 SC (0.009%) > lambda cyhalothrin 5% EC (0.015%). Although the adult stages of mealybug were covered with waxy coating, still they were susceptible to new molecular insecticides with low LC50 value.

Keywords

LC50, Paracoccus marginatus, Relative toxicity, Thiamethoxam