Maerere, A.P., Sibuga, K.P., Bulali, J.E.M., Mwatawala, M.W., Kovach, J., Kamanywa, S., Mtui, H.D. and Erbaugh, M. (2010) Deriving Appropriate Pest Management Technologies for Smallholder Tomato (Solanum lycoperscum Mill.) Growers: A Case Study of Morogoro, Tanzania. Journal Animal and Plant Science, 6, 663-676.

has been cited by the following article:

• TITLE: Different Plant Extracts against Phytophthora infestans (Mont.) de Bary in Tomato in Vitro

  AUTHORS: Rachel I. Ndala, Ernest Rashid Mbega, Patrick A. Ndakidemi

  KEYWORDS: Tomato, Late Blight Disease, Plant Extracts, Inhitionpercentage

  JOURNAL NAME: American Journal of Plant Sciences, Vol.10 No.4, April 30, 2019

  ABSTRACT: The objective of this study was to evaluate the efficacy of plant extracts in managing late blight disease in tomato, in vitro. Crude extracts were from Plectranthus barbatus, Tephrosia vogelii, Sphaeranthus suaveolens and Lantana camara. These were compared with commercial formulations Otiva fungicide and untreated as negative control. Their effectiveness was determined by measuring the inhibition zone of the mycelial growth of the pathogen recorded in triplicate at 48 hours and 72 hours. The results showed significant differences (P ≤ 0.001) among the extracting solvents on percentage inhibition of Phytophthora infestans. Methanol was superior in inhibiting the growth of mycelial growth of P. infestans as compared with ethyl acetate. Furthermore, all plants tested showed antifungal activity against P. infestans. The P. barbatus, L. camara and S. suaveolens were comparable with the commercial fungicide in inhibiting the growth of P. infestans. In this study, T. vogelii extract showed poor results in inhibiting the mycelial growth of P. infestans as compared with other plant extracts. Also, it was observed that, there were significant (P