Aphicidal activity of some indigenous plants extracts against cabbage aphid, Brevicoryne brassicae (Hemiptera: Aphididae) and mealy plum aphid, Hyalopterus pruni (Hemiptera: Aphididae)

Abstract

Synthetic pesticides have made an impact on aphid control but limitations due to the development of resistance and negative impact on humans and the environment, focus has shifted to alternative strategies. We explored the effectiveness of indigenous plant extracts of Artemisia absinthium and Prunus armeniaca against B. brassicae and H. pruni while preserving its natural enemies. Four replicates of the extracts were studied under laboratory conditions. Ethanolic extract of Artemisia absinthium (EEAA) shows 75.64% and 60.25% mortality while ethanolic extract of Prunus apricot kernel (EEPAK) shows 66.66% and 48.71% mortality of H. pruni and B. brassicae respectively (p < 0.01). Similarly, aqueous extracts of Artemisia absinthium (AEAA) and Prunus apricot kernel (AEPAK) also seem to be useful with 62.5% and 58.78% mortality in H. pruni, respectively. Of the different ethanolic extracts, 5% of AA was found most effective against aphids with a population reduction of 75.64% while 1% of aqueous extract of the PAK showed the least (7.69%) aphid mortality. Due to their availability, affordability, and eco-friendly, small-scale farmers can use them as a replacement for chemical pesticides. Thus, we suggest the use of Prunus apricot kernel (PAK) and Artemisia absinthium (AA) for the management of aphids in and around Ladakh.