Impact of novel crystal compound 2, 5-diacetoxy-2-benzyl-4,4,6,6-tetramethyl-1,3- cyclohexanedione on feeding physiology and developmental indices of army worm, Spodoptera litura Fab. (Lepidoptera: Noctuidae)
Department of Zoology, Arignar Anna Government Arts College, Musiri-621 201, Tamil Nadu, India; Department of Biology, Faculty of Natural and Computational Sciences, University of Gondar, Post Box 196, Gondar, Ethiopia; Entomology Research Institute, Loyola College, Chennai 600 034, India
Jeyasankar, A., Department of Zoology, Arignar Anna Government Arts College, Musiri-621 201, Tamil Nadu, India; Raja, N., Department of Biology, Faculty of Natural and Computational Sciences, University of Gondar, Post Box 196, Gondar, Ethiopia; Ignacimuthu, S., Entomology Research Institute, Loyola College, Chennai 600 034, India
Impact of new crystal compound 2, 5-diacetoxy-2-benzyl-4, 4, 6, 6-tetramethyl-l, 3-cyclohexanedione on feeding physiology, developmental indices and quantitative changes in haemolymph protein on the larvae of armyworm, Spodoptera litura was studied. The novel compound was isolated from the leaves of medicinal plant, Syzygium lineare. The percentage of feeding physiology parameter such as Consumption Index (CI), Growth Rate (GR), Approximate Digestibility (AD), Efficiency of Conversion of Digested Food (ECD) and Efficiency of Conversion of Ingested Food (ECI) and weight gained by the larva was decreased significantly (p<0.05 by LSD). The developmental indices such as time taken for pupation, pupal weight, adult longevity, eggs laid per moths and the percentage of egghatchability were also decreased significantly (p<0.05 by LSD) compared to control. Statistically significant (p<0.05 by LSD) reduction in total haemolymph protein was recorded at 100 ppm concentration of crystal compound treated larvae. This compound has potential to serve as an alternative botanical pesticide in the management of agricultural important filed insect pests. © 2012 Academic Journals Inc.