Vol. 11, Special Issue 7 (2022)

Author(s):
Thawfeeq Ahamed J, Srinivasan G, Shanthi M and Mini ML

Abstract:
The marine algae, popularly known as seaweeds are one of the most important marine resources of the world. The insecticidal activity of seaweed extracts viz., brown seaweed, Sargassum tenerrimum and red seaweed, Gracilaria corticata were evaluated against Aphis craccivora adults on cowpea. Sargassum tenerrimum and Gracilaria corticata methanolic extracts showed insecticidal activity against Aphis craccivora at the same concentrations tested (0.1, 0.2, 0.4, 0.8 and 1.6% for both the extracts). Both the seaweed extracts caused more than 60% mortality against Aphis craccivora at higher concentration. Hence, these seaweed extracts will be an alternative botanical pesticide in the development of IPM module for the management of aphids.