Abstract
Insecticidal activities of Parthenium hysterophorus L. (PH) studied against Plutella xylostella the major insect pest of cruciferous crops and Aphis craccivora Koch on legume crops. Results showed that PH extract found promising toxicity (LC50 = 1140.68 mg L−1) to larvae of P. xylostella after 96 h of treatment as compared to parthenin (LC50 = 1709.42 mg L−1). Parthenin also showed moderate repellent activity to P. xylostella (43.33 ± 4.18%). However, parthenin is more effective against A. craccivora (LC50 = 839 mg L−1) than PH extract (LC50 = 947.87 mg L−1). Based on field bio-efficacy studies, PH extract can be recommended for the management of target pests.
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