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Veerabadran, U., Venkatraman, A., Souprayane, A., Narayanasamy, M., Perumal, D., Elumalai, S., Sivalingam, S., Devaraj, V. and Perumal, A. (2013) Evaluation of Antioxidant Potential of Leaves of Leonotis nepetifolia and Its Inhibitory Effect on MCF7 and Hep2 Cancer Cell Lines. Asian Pacific Journal of Tropical Disease, 3, 103-110.

has been cited by the following article:

• TITLE: The Effect of Lion’s Ear (Leonotis nepetifolia) and African Basil (Ocimum gratissimum) Plant Extracts on Two-Spotted Spider Mites (Tetranychus urticae) for Improved Yield and Quality of French Beans

  AUTHORS: Kennedy Ogayo, Jane Nyaanga, Joshua Ogweno, Joshua Ogendo

  KEYWORDS: Leonotis nepetifolia, Ocimum gratissimum, Tetranychus urticae, French Beans

  JOURNAL NAME: Advances in Entomology, Vol.7 No.1, December 18, 2018

  ABSTRACT: An experiment to evaluate the bio-control potential of Leonotis nepetifolia and Ocimum gratissimum plant extracts against two-spotted spider mites on French beans was conducted in the field. Five plant extract concentrations (1.5%, 3.0%, 6.0% and 12.0% w/v) were applied with water and Abamectin 0.6 ml/L as controls. Mite counts were done before and after treatment application and expressed as corrected percent efficacy. The impact of the mites on the French beans was evaluated by recording percent leaf reduction and quality and quantity by number of pods, pod length, diameter and yield. There was a dose dependent response in percent mite and leaf reduction, number of pods and yield. Treatments applied at 12% w/v indicated higher mite reduction (82.75%) for L. nepetifolia and 69.06% for O. gratissimum compared to abamectin (65.76%). The lowest percent leaf reduction of 1.71% for L. nepetifolia 0.39% for O. gratissimum and abamectin (20.46%) was also at 12% w/v. Similarly, the highest number of pod (61.00) for L. nepetifolia, 48.67 for O. gratissimum compared to 28.33 abamectin and yield (0.88 kg) for L. nepetifolia and 0.90 kg for O. gratissimum was also recorded at 12% w/v compared to 0.36 kg for abamectin. There were no significant differences in pod diameter and pod length between the extracts concentrations and abamectin. The study demonstrated the efficacy of L. nepetifolia and O. gratissimum in managing two-spotted spider mite and subsequent increase in French bean yield under field conditions.