Effect of insect growth regulators; lufenuron, pyriproxyfen, and methoxyfenozoid for the control of Trogoderma granarium Everts (Coleoptera: Dermestidae)

Technical grade material of three insect growth regulators viz., lufenuron, pyriproxyfen and Methoxyfenozide were evaluated against eggs, larvae and pupa of Trogoderma granarium Everts under laboratory conditions. The tested IGRs were applied at four concentrations (i.e., 5, 10, 15 and 20ppm) at optimum conditions of 30 ± 2°C and 60 ± 5% r.h. The results revealed that pyriproxyfen showed highest (100%) ovicidal effect followed by methoxyfenozide and lufenuron, respectively. While against larvae, lufenuron was the most effective (74.86%) while pyriproxyfen was least effective. Adult suppression was minimum (23.41%) in case of methoxyfenozide treatmen while highest (89.74%) in pyriproxyfen treated pupae. The results about the F₁ adult progeny emerge from adult exposed to the IGRs treated diet showed that pyriproxyfen gave 100% adult suppression and resulted into the formation of supper larvae followed by lufenuron and methoxyfenozide. Results regarding the effect of concentration showed that a direct dose dependent response was observed in all the bioassays. The current investigations suggest that the lufenuron would be a better option for the management of T. granarium.

 

Key Words: Insect growth regulators, lufenuron, pyriproxygen, methoxifenozide, Tgogoderma granarium, Ovicidal, mortality, F₁ adult Progeny