Insecticidal and growth regulatory effect of Jatropha curcas and Linum usitatissimum extracts along with new chemistry pesticide spinetoram against Sargodha strain of Rhyzopertha Dominica

Store grain insect pests such as Lesser grain borer (Rhyzopertha dominica) is a key feeder and cause substantial weight loss of wheat during storage. Present study was planned to evaluate insecticidal, repellent and growth regulator potential of botanical extracts of two plants Jatropha curcas and Linum usitatissimum along with Spinetoram against Rhyzopertha Dominica. This study was conducted at the Department of Entomology, University of Agriculture, Faisalabad (UAF) Grain Research, Training, and Storage Management Cell. Each treatment with three replication of 5%, 10%, and 15% concentrations of plant extracts and 100ppm, 200ppm, and 300ppm concentrations of insecticide were used against the adults of R. dominica by using Complete Randomized Design. Insect mortality was taken after 24, 48, and 72 hours after treatment. Data of growth regulation data was observed after 30 and 60 days. Data was analyzed by statistic 8.1 software for analysis of variance at 5% level of significance and treatment means was compared with the help of Tukey's Honestly Significant Difference (THSD) test. After 72 hours, Spinetoram showed maximum percent mortality (84%) followed by J. curcas (19.17%) and L. usitatissimum (12.28%) at their higher concentrations rate. Among treatments, after 60 days of exposure, Spinetoram was proved to be more effective against the R. dominica with maximum growth inhibition (70%) as compared to J. curcas (44%) and Linseed (28%). Overall the results indicated that these plant extracts and Spinetoram can be used as efficient alternatives of synthetic chemicals for management of stored grains insect pests.