Repellent activities of some plant extracts against rose aphid, Macrosiphum rosae (Hemiptera: Aphididae)

Abstract :

Rose aphid, Macrosiphum rosae is economically important insect pest of rose flowers that is hard to manage due to its resistance against usually employed chemical insecticides. As such screening of extracts from medicinal plants for aphidicidal activity could provide an alternative means of pest control. In the present study, ethanolic and aqueous extracts from five medicinal plants viz. Artemisia absinthium, Euphorbia helioscopia, Iris germanica, Viola odorata and Mentha longifolia were tested in the laboratory against adult, wingless rose aphid using Choice bioassay via leaf dip technique. The results illustrated that all tested extracts demonstrated significant pest repellency in comparison to control. The screened extracts were grouped in different classes based on percentage of repellency caused by them. The maximum repellency was inflicted by ethanolic extracts of A. absinthium at 3% concentration followed by M. longifolia. The extracts of I. germanica and V. odorata showed moderate repellent effect whereas E. helioscopia was least repellent against this obnoxious sucking pest. The study further revealed that repellent activity was enormously dependent on the extract concentration and exposure time. Moreover ethanolic extracts exhibited much higher repellency than aqueous extracts of respective medicinal plants. In conclusion, the result of this study showed that extracts from different parts of medicinal plants could be effectively used as repellents against rose aphid.

Keyword :

Macrosiphum rosae, plant extracts, choice bioassay, leaf dip technique, repellent activity

Author(s) : Yousuf, I., Buhroo, A. A., Nisa, G.
Downloads : 31
Published Issue : 2021 Vol. 16 Number 2

2021 Vol. 16 Number 2