摘要：Both Ageratum conyzoides and Ageratum vulgaris have been used to manage pest throughout the world.
Spodoptera litura (Fab.) (Lepidoptera: Noctuidae) is one of the pests of field crops and has been developed
resistance against most of the modern classes of synthetic pesticides worldwide. S. litura third and fifth instar
larvae treated topically with 0.1μg of A. conyzoides and A. vulgaris were found to be significantly reduce total
head protein after 24, 48 and 72 hours of treatment application over control. Similar trend was also observed when
these plant extracts injected at 0.01 μl/ insect. Furthermore both A. conyzoides and A. vulgaris have similar
impact on S. litura third and fourth instar larvae. These two plants can be used as botanical insecticide in pest
management programme.
