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Evaluation of larvicidal efficacy of indigenous plant extracts against Culex quinquefasciatus (Say) under laboratory conditions

The present study focused on the insecticidal potential of easily available local botanicals using a simple but effective method. Seven indigenous plants (Cinnamomum tamala (taiz pat), Aloe vera (aloe vera), Datura alba (datura), Allium sativum (garlic), Allium cepa (onion), Zingiber officinale (ginger). | Turkish Journal of Agriculture and Forestry http://journals.tubitak.gov.tr/agriculture/ Research Article Turk J Agric For (2018) 42: 207-215 © TÜBİTAK doi:10.3906/tar-1711-69 Evaluation of larvicidal efficacy of indigenous plant extracts against Culex quinquefasciatus (Say) under laboratory conditions 1,2,3, 2 1 1 Javaid IQBAL *, Faisal ISHTIAQ , Abdulaziz S. ALQARNI , Ayman A. OWAYSS Department of Plant Protection, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia 2 Department of Entomology, MNS University of Agriculture, Multan, Pakistan 3 Department of Entomology, University College of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Pakistan 1 Received: 16.11.2017 Accepted/Published Online: 29.03.2018 Final Version: 29.05.2018 Abstract: The present study focused on the insecticidal potential of easily available local botanicals using a simple but effective method. Seven indigenous plants (Cinnamomum tamala (taiz pat), Aloe vera (aloe vera), Datura alba (datura), Allium sativum (garlic), Allium cepa (onion), Zingiber officinale (ginger), and Ocimum basilicum (niazbo/basil) were tested for their larvicidal efficacy against Culex quinquefasciatus (Say) under laboratory conditions. The evaluation of a series of five concentrations (1%, 2%, 3%, 4%, and 5%) of aqueous plant extracts against the 4th instar larvae revealed convincing larval mortality effects at 24 and 48 h after exposure. Larval mortality showed a significant concentration-dependent correlation. No mortality was observed in the control. The LC50 values demonstrated garlic as the most effective (1.37%), followed by taiz pat (1.48%) and aloe vera (1.96%), at 24 h. Moreover, the LC50 at 48 h showed high efficiency by aloe vera (0.37%), followed by garlic (0.55%) and taiz pat (0.98%). The sequence of LC50 values for the other plants were onion (2.20%) < datura (2.49%) < niazbo (5.32%) < ginger (7.48%) after 24 h and .