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Blights, fungicide, severity, tomato, variety, yield


Tomato is one of the most widespread and popular vegetable food crops in the world including Georgia. The average yield of tomatoes in Georgia is very low comparing with other countries and local production, so far, cannot meet the domestic demand. In Georgia, tomato production in open fields is highly constrained by the early blight (Alternaria solani) and late blight diseases (Phytophthora infestans). Key to successfully controlling the most common fungal foliar diseases is an integrated management program where the main component is using resistant varieties and fungicides. This study aimed to determine the effectiveness of biological fungicide and resistant variety to combat tomato late and early blights under field conditions in the humid subtropics in Western Georgia. The research was conducted at the experimental field of the Institute of Phytopathology and Biodiversity in 2020-2021. Tomato varieties, moderately resistant (De-Barao Rozovii) and susceptible (Vardisferi Choportula) to late and early blights, and chemical (Ridomil gold) and bacterial fungicides (Phytosporin M) were research objects. The analysis of variance showed that the effect of fungicides and tomato variety was highly significant for late blight severity and tomato fruit yield. The Ridomil gold was the most effective than biofungicide Phytosporin M as the severity of Phytophthora infestans on susceptible variety was reduced by 41.5% and yield increase was 77.6%. In treatment with Phytosporin M, the disease severity was reduced by 23.2% and yield increase was 40.5%. The severity reduced by 15% and yield increased by 35.3% on moderately resistant variety De Barao.


Ide, R., Ichiki, A., Suzuki, T., Jitsuyama, Y. (2022): Analysis of yield reduction factors in processing tomatoes under waterlogging conditions. Scientia Horticulturae 295:110840.

Nelson, S.C. (2008): Late Blight of Tomato (Phytophthora infestans). Plant Disease 45. Available at http://hdl.handle.net/10125/12406 (Accessed April 15, 2023).

Mchedlidze, I. (2009): Vegetable production. Publishing house “Teqnikuri Universiteti”, Tbilisi, Georgia.

National Statistics Office of Georgia (Geostat). Statistical data. 2021. Available at http://www.geostat.ge/index.php?action=page&p_id=752&lang=eng (Accessed April 15, 2023).

FAOSTAT. 2020. Statistics of the Food and Agriculture Organization of the United Nations. Available at: http://www.fao.org/faostat/en/#data/QCL (Accessed on April 13, 2023).

Shainidze, O., Lamparadze, Sh., Beridze, N., Chkubadze, G., Macharadze, G. (2022): Efficiency of different doses of insectofungicidal biopreparation (Gaupsin) against phytophthora of tomato in Adjara, Georgia. Bulgarian Journal of Agricultural Science 28 (3): 437-442.

Wagas, R., Ghazanfar, M.U., Hamid, M.I. (2019): Occurrence of late blight (Phytophthora infestans (Mont). de Bary) in major potato growing areas of Punjab, Pakistan. Sarhad Journal of Agriculture 35(3): 806-815.

Olanya, O.M., Larkin, R.P., Honeycutt, C.W. (2015): Incidence of Phytophthora infestans (Mont.) de Bary on potato and tomato in Maine, 2006–2010. Journal of Plant Protection Research 55(1): 58-68.

Poliksenova, V. D. (2008): Mycoses of tomato: pathogens, plant resistance. BSU Publishing, Minsk, Belarus.

Fillipov, A.V. (2012): Phytophtora of Potato. Zashita i Karantin Rastenii 5:10-22.

Chaerani, R., Voorrips, R.E. (2007): Tomato early blight (Alternaria solani): the pathogen, genetics, and breeding for resistance. Journal of General Plant Pathology 72: 335-347.

Elansky, S.N., Kokaeva, L.Y., Statsyuk, N.V., Dyakov, Y.T. (2017): Population structure and dynamics of Phytophthora infestans, a causative agent of the late blight of potato and tomato. Potato Protection 3:3-44.

Arora, R.K., Sharma, S., Singh, B.P. (2014): Late blight disease of potato and its management. Potato Journal 41(1): 16-40.

Lal, M., Yadav, S., Singh, V., Nagesh, M. (2016): The use of bio-agents for management of potato diseases. In: Rigobelo EC, editor. Plant Growth. InTech Publisher, London, UK. http://dx.doi.org/10.5 772/62601.

Elansky, S.N., Pobedinskaya, M.A., Mytsa, E.D., Plyakhnevich, M.P. (2012): Resistance of potato and tomato late blight pathogen to fungicides. Mycology and phytopathology 46 (5): 340-344.

Alexandrov, V. (2011): Efficacy of some fungicides against late blight of tomato. Bulgarian Journal of Agricultural Sciences 1(4): 465–469.

Haq, I., Rashid, A., Khan, S.A. (2008): Relative efficacy of various fungicides, chemicals and biochemicals against late blight of potato. Pak. Journal Phytopathol. 21: 129-133.

Mugao, L. G., Muturi, P.W., Gichimu, B.M., Njoroge, E.K. (2020): In Vitro Control of Phytophthora infestans and Alternaria solani Using Crude Extracts and Essential Oils from Selected Plants. International Journal of Agronomy Article ID 8845692:1-10

Neupane, P., Shrestha, R.K., Shrestha, J. (2018): Efficacy of fungicides against late blight of potato. Agricultura 3 (4):107-108. DOI: https://doi.org/10.15835/agrisp.v107i3-4.13065.

El-Naggar, M.A., Abouleid, H.Z., El-Deeb, H.M., Abd-El-Kareem, F., Elshahawy, I.E. (2016): Biological control of potato late blight by means of induction systemic resistance and antagonism. Research Journal of Pharmaceutical, Biological and Chemical Sciences 13:1338-1348.

Chowdappa, P., Kumar, M.S.P., Lakshmi, J.M., Upreti, K.K. (2013): Growth stimulation and induction of systemic resistance in tomato against early and late blight by Bacillus subtilis OTPB1 or Trichoderma harzianum OTPB3. Biological Control 65:109-117.

Awan, Z.A., Shoaib, A. (2019): Combating early blight infection by employing Bacillus subtilis in combination with plant fertilizers. Current Plant Biology 20: 100125.

Tsetskhladze, T.M., Sikharulidze, Z.V., Muradashvili, M., Sikharulidze, K.T. (2018): Screening of tomato varieties for resistance to major fungal diseases and bacterial wilt. Plant Protection and Quarantine 64:262-267.

Dospekhov, B. M. (1985): Methodology of the field trial. Publishing house “Kolos”. Moskow, Russia.

Chanishvili, Sh., Tkebuchava, Z., Butskhrikidze, G. (2017): Methodology of the trial case in horticulture. Javakheti University Publisher, Tbilisi, Georgia.

James, W.C. (1974): Assessment of plant diseases and losses. Annual Review of Phytopathology 12(1): 27-48. https://doi.org/10.1146/annurev.py.12.090174.000331.

Afanasieva, A.I., Gruzdev, G.S., Dmitriev, L.B., Zinchenko, V.A., Kalinin, V.A., Slovtsov, R.I. (1992): Practical course on chemical plant protection. Publishing house “Kolos”. Moskow, Russia.

Desta, M., Yesuf, M. (2015): Efficacy and Economics of Fungicides and their Application Schedule for Early Blight (Alternaria solani) Management and Yield of Tomato at South Tigray, Ethiopia. Journal of Plant Pathology& Microbiology 6 (5): 1000268.

Nakov, B., Nakova, М., Angelova, R., Andreev, R. (2007): Forecasted and signalization of diseases and pest on crop plants. Publisher IMN, Plovdiv, Bulgaria.

Nowicki, M., Foolad, M.R., Nowakowska, M., Kozik, E.U. (2012): Potato and tomato late blight caused by Phytophthora infestans: An overview of pathology and resistance breeding. Plant Disease 96 (1): 4–17.

Kumbar, B., Riaz, B.M., Nagesha, S.N., Nagaraja, M.S., Prashat, D.G., Kerima, O.Z., Karosiya, A., Chavan, M. (2019): Field application of Bacillus subtilis isolates for controlling late blight disease of potato caused by Phytophthora infestans. Biocatalysis and Agriculture biotechnology 22:101366.

El-Kholy, R.M., El-Samadesy, A. M., Helalia, A. A., El-Ballat, E. M. (2021): Efficacy of certain chemical Fungicides and Biofungicides on early blight disease in tomato under field conditions. Al-Azhar Journal of Agricultural Research 46 (2): 145-153.

Sreenivasulu, R., Reddy, M.S.P., Tomar, D.S., Sanjay, M.S.S., Reddy, B. B. (2019): Managing of early blight of tomato caused by Alternaria solani through fungicides and bioagents. International Journal of Current Microbiology and Applied Sciences 8(6): 1442-1452.

Sharma, R.K., Patel, D.R., Chaudhari, D.R., Kumar, V., Patel, M.M. (2018): Effect of some fungicides against early blight tomato (Lycopersicon esculentum Mill.) caused by Alternaria solani (Ell. & art.) and their Impact on yield. International Journal of Current Microbiology and Applied Sciences 7(7): 1395-1401.

Mendonca, L.B.P., Coelho, L., Stracieri, J., Batista, J., Ferreira, J., Tebalti, D. N. (2015): Chemical control of Phytophtora wilt in tomatoes. Bioscience Journal 31(4):1015-1023.

Parvez, E., Hussain, S., Rashid, A., Ahmed, M.Z. (2003): Evaluation of different protectant and eradicant fungicides against early and late blight of potato caused by Alternaria solani (Ellis and Mart) Jones and Grout and Phytophthora infestans (Mont) De Bary under field conditions. Pakistan Journal Biological Sciences 6: 1942-1944.

Vasilieva, T.V. (2020): Diseases of tomato: efficacy of biological fungicides. Available at https://agbz.ru/articles/diseases-of-tomato-efficacy-of-biological-fungicides/(Accessed April 12, 2023).

Kilani-Feki, O., Saoussen B. K., Dammak, M., Kamoun, A., Jabnoun-Khiareddine, H., Daami-Remad, M., Tounsi, S. (2016): Improvement of antifungal metabolites production by Bacillus subtilis V26 for biocontrol of tomato postharvest disease. Biological Control 95:73-82.

Khalil, M.E.E.K., Abdelghany, R.A.T.E. (2021): Effectiveness of Some Biotic and Abiotic Agents to Control Tomato Early Blight Disease Caused by Alternaria solani. Egyptian Journal of Phytopathology 49(1):114-128.

Verma, A., Kumar, S., Harshita., Shina, A., Jaiswal, S. (2018): Evaluate the efficacy of bio-control agents and botanicals against early blight of potato caused by Alternaria solani. The Pharma Innovation Journal 7(3): 28-30.

Singh, V.P., Khan, R.U., Pathak, D. (2018): In vitro evaluation of fungicides, bio-control agents and plant extracts against early blight of tomato caused by Alternaria solani (Ellis and Martin) Jones and Grout. International Journal of Plant Protection 11 (1): 102-108.

Shamurailatpam, D., Kumar, A. (2020): A Review on recent methods to control early blight of tomato (Solanum lycopersicum L.). Plant Cell Biotechnology and Molecular Biology 21(37):136-148.

Sarfraz, M., Khan, S.A., Moosa, A., Farzand, A., Ishaq, U., Naeem, I., Khan, W. A. (2018): Promising antifungal potential of selective botanical extracts, fungicides and trichoderma isolates against Alternaria solani. Cercetari Agronomice in Moldova 51(1):65-74.

Kumar, V., Singh, A.K., Kumar, A. (2017): Disease management of tomato through PGPB: current trends and future perspectives. 3Biotech 7(4):255.




How to Cite

Tsetskhladze, T., Natsarishvili, K., Sikharulidze, K., Aptsiauri, N., & Sikharulidze, Z. (2024). EFFICIENCY OF MEANS TO CONTROL MAJOR DISEASES OF TOMATO IN HUMID SUBTROPICS OF GEORGIA. Journal of Applied Biological Sciences, 18(2), 162–171. Retrieved from https://jabsonline.org/index.php/jabs/article/view/1223




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