LABORATORY INVESTIGATION OF TERMINALIA ARJUNA AND TRACHYSPERMUM ROXBURGHIANUM AGAINST GROUNDNUT PEST, HELICOVERPA ARMIGERA
Objective: The present study was investigated important medicinal plant extract Terminalia arjuna and Trachyspermum roxburghianum against the
fourth instars larvae of groundnut pest Helicoverpa armigera.
Methods: The extracts were used as methanol, ethyl acetate, chloroform, and hexane and are used as the different concentration of 25, 75, 125, 175,
and 225 ppm level of antifeedant, larvicidal, and ovicidal activity of fourth instars larvae on H. armigera were maintained the laboratory condition.
Results: It was noted that antifeedant activity of two important medicinal plants in the experiment of the methanol extract of T. arjuna was 99% at
225 ppm and T. roxburghianum methanol extract was 92% at 225 ppm, respectively. The high percent mortality present in the 225 ppm concentration
of both plants are T. arjuna: 100, 98, 90, and 86 ppm and T. roxburghianum: 97, 92, 89, and 82 ppm, respectively. These processes maintained
probit analysis, values are detecting and high mortality level of methanol extract T. arjuna with LC
values were 105.81 and 202.80 ppm;
T. roxburghianum methanol extract of LC
values were 91.94 and 177.48 ppm, respectively. The maintained in the treatments based on the
procedure followed the experiment of ovicidal activity of both plants. The eggs are no hatchability for methanol extract of T. arjuna were 91% at
225 ppm, respectively, and methanol extract of T. roxburghianum were 90% at 225 ppm, respectively.
Conclusion: These results have been suggested that the T. arjuna and T. roxburghianum plant methanol extract used as the integral pest management
studies of the groundnut pest, H. armigera.
Keywords: Antifeedant, Larvicidal, Ovicidal activity, Terminalia arjuna, Trachyspermum roxburghianum, Helicoverpa armigera.
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