Asian Journal of Plant Pathology1819-1541xxxx-xxxxScience International10.3923/ajppaj.2017.48.52Alternaria solani]]>JosephAbiodun EseEfe-Imafidon Akere AdemiluyiBenson Oluwafemi AlukoPatrick Ajibola 12017111Background and Objective: Control of tomato early blight has relied almost exclusively on the application of synthetic fungicides.
The use of plant extracts is a safe and eco-friendly alternative of managing many plant pathogens. The present study examined
the severity of early blight on tomato and evaluated the efficacy of some leaf extracts in the management of the disease.
Materials and Methods: The experiment was laid in a randomized complete block design with three replicates. The treatments consisted
of plots sprayed with dried extracts of Chromolaena odorata , Euphorbia heterophylla , Tithonia diversifolia , Azadiractha indica ,
Carica papaya and the control. Data were collected on disease severity, number of fruits, fruit length and fruit weight (yield).
Results: Significantly early blight severities were observed in the control plots at 4, 5, 6 and 7 week after transplanting. Carica papaya
proved most effective in reducing the severity of early blight on tomato. Plot treated with C. papaya produced a significantly (p≤0.05)
higher number of fruits (104.0) and higher fruit length (66.0 mm). The least fruit length was recorded in the control plot (46.2 mm).
Significantly (p≤0.05) higher fruit weight (328 g) was recorded in plot treated with C. papaya while the lowest fruit yield (106.7 g) was
observed in the control plot. There was no significant difference in fruit weight of tomato in plots treated with C. odorata , A. indica and
E. heterophylla . Plots treated with T. diversifolia and the control gave statistically similar fruit weights (126 and 106 g, respectively).
Conclusion: The use of plant extracts minimizes the risks and hazards associated with toxic fungicides, especially, on crop plants produced
for fresh consumption. Further studies are, however, suggested to unfold the potential of other botanicals in the management of A. solani on tomato.]]>Chohan, S., R. Perveen, M.A. Mehmood, S. Naz and N. Akram,2015Alternaria solani, the causal agent of tomato early blight.]]>17111118FAO.,20102010Abdel-Sayed, M.H.F.,2006Alternaria solani, the causal of tomato early blight disease.]]>2006Umeh, V.C., F.O. Kuku, E.I. Nwanguma, O.S. Adebayo and A.A. Manga,200220181186Tewari, R. and K. Vishunavat,2012Alternaria solani) in tomato by integration of fungicides and cultural practices.]]>5201206Chaerani, R. and R.E. Voorrips,2006Alternaria solani): The pathogen, genetics and breeding for resistance.]]>72335347Rafi, H. and S. Dawar,20152015Duru, C.M. and N.E. Onyedineke,2010In vitro study on the antimicrobial activity and phytochemical analysis of ethanolic extracts of the mesocarp of Voacanga africana.]]>5163169Gachomo, E.W. and S.O. Kotchoni,20087273279Latha, P., T. Anand, N. Ragupathi, V. Prakasam and R. Samiyappan,2009Alternaria solani.]]>508593Thobunluepop, P.,20091211191126Derbalah, A.S., M.S. El-Mahrouk and A.B. El-Sayed,2011Alternaria solani.]]>10115121Kagale, S., T. Marimuthu, B. Thayumanavan, R. Nandakumar and R. Samiyappan,2004Datura metel against Rhizoctonia solani and Xanthomonas oryzae pv. oryzae.]]>6591100Bowers, J.H. and J.C. Locke,2004Phytophthora nicotianae in soil and control of Phytophthora blight in the greenhouse.]]>881116Sokal, R.R. and F.I. Rohlf,19953rd Edn.,pp: 887pp: 887Agrios, G.N.,20055th Edn.,Pages: 922Pages: 922Bhat, M.N.,2001In vitro evaluation of some leaf extracts against Fusarium spp. causing yellows of ginger in Sikkim.]]>16259262Curtis, H., U. Noll, J. Stormann and A.J. Slusarenko,2004Allium sativum L.) against plant pathogenic bacteria, fungi and Oomycetes.]]>657989Krebs, H., B. Dorn and H.R. Forrer,2006131621Arya, A. and A.E. Perello,2010Pages: 388Pages: 388Vijayan, M.,1989Alternaria solani (Ellis and Martin) Jones and Grout.]]>1989Goussous, S.J., F.M. Abu el-Samen and R.A. Tahhan,2010Alternaria solani).]]>4317451757Amadioha, A.C.,2000in vitro and in vivo with extracts of Azadirachta indica.]]>19287290Emeasor, K.C., S.O. Emosairue and V.V. Mmegwa,2002Sitophilus zeamais (Motschulsky).]]>48286