International Journal of Life Science and Agriculture Research

Sheath rot caused by Sarocladium oryzae (Sawada), is a major disease of rice that can significantly reduce grain yield and quality, resulting in economic losses for farmers. This study evaluated the efficacy of selected fungicides for the management of sheath rot disease under field conditions in Guyana and also assessed the potential socio-economic benefits. Three field trials were conducted during the Spring and Autumn cropping seasons of 2022 and the Spring cropping season of 2024 at the Plant Pathology Department Experimental Area, Guyana Rice Development Board (GRDB), Rice Research Station (RRS), Burma. The experiments were established using a Randomized Complete Block Design (RCBD) with four replications per treatment. The rice variety GRDB 14 was grown under recommended agronomic practices, and fungicides were applied at their respective rates. Results from the three trials demonstrated that most fungicidal treatments reduced sheath rot disease severity and improved growth and yield parameters compared with untreated control. The most effective treatments were Top Cop at 250 ml/ac, Onix at 350 ml/ac, Curacarb at 250 ml/ac, Saaf at 300 g/ac, and the positive check, Fugi One at 300 ml/ac, which reduced disease severity by 68.00–76.00% relative to the untreated control. Other treatments also reduced disease severity by 31.99–48.00%. Yield responses were mostly positive across the trials, with increases ranging from 2.23–34.23% in Spring 2022, 8.69–90.98% in Autumn 2022, and 3.31–70.43% in Spring 2024 over the untreated control. The reduction in disease severity and some levels of increase in grain yield indicate that effective fungicide use can enhance rice productivity and profitability. In general, increased yields can improve the overall farm income, strengthen household livelihoods, and contribute slowly towards reduction of poverty leading to greater economic returns. Furthermore, improved productivity supports sustainable rice production, enhances food security, and allows for benefits to stakeholders throughout Guyana’s rice value chain. Based on the consistent performance of Top Cop at 250 ml/ac, Onix at 350 ml/ac, Curacarb at 250 ml/ac, Saaf at 300 g/ac, and the positive check, Fugi One at 300 ml/ac are recommended for the management of sheath rot disease, particularly in areas where the disease is most prevalent.

Sarocladium oryzae; sheath rot; fungicides; rice yield; food security; socio-economic benefits.

1. Bigirimana, V. P., Hua, G. K. H., Nyamangyoku, O. I., & Höfte, M. (2015). Rice sheath rot: An emerging ubiquitous destructive disease complex. Frontiers in Plant Science, 6, 1066. https://doi.org/10.3389/fpls.2015.01066.
2. Mehta, A., Singh, S. K., Basu, U., Ahanger, S. A., Sharma, S., Singh, B., Vaid, A., Ali, H. M., Alsakkaf, W. A. A., & Basandrai, A. K. (2025). Determination of yield losses against sheath rot caused by Sarocladium oryzae in rice varieties with differential resistance. Scientific Reports, 15, 36309. https://doi.org/10.1038/s41598-025-05104-y.  
3. Naveenkumar, R., & Mohanpriya, R. (2017). Survey and evaluation of efficacy of some fungicides against virulence of Sarocladium oryzae inciting sheath rot disease of rice. ORYZA—An International Journal on Rice, 53(4), 1–6. 
4. Sharma, L., Nagrale, D., Singh, S. K., Sharma, K. K., & colleagues. (2013). A study on fungicides potential and incidence of sheath rot of rice caused by Sarocladium oryzae (Sawada). Journal of Applied and Natural Science, 5(1), 24–29. https://doi.org/10.31018/jans.v5i1.276. 
5. Mandal, D., Pal, R., & Mohapatra, S. (2024). Field evaluation of some novel fungicides for the management of sheath rot disease in rice. International Journal of Advanced Biochemistry Research, 8(10), 907–909. 
6. Brent, K. J., & Hollomon, D. W. (2007). Fungicide resistance in crop pathogens: How can it be managed? FRAC Monograph. Fungicide Resistance Action Committee.
7. Kongcharoen, N., Kaewsalong, N., & Dethoup, T. (2020). Efficacy of fungicides in controlling rice blast and dirty panicle diseases. Scientific Reports, 10, 16233. https://doi.org/10.1038/s41598-020-73222-w.
8. Lamichhane, J. R., Osdaghi, E., Behlau, F., Köhl, J., Jones, J. B., & Aubertot, J. N. (2018). Thirteen decades of antimicrobial copper compounds applied in agriculture. A review. Agronomy for Sustainable Development, 38, 28. https://doi.org/10.1007/s13593-018-0503.
9.  Sharma, L., Nagrale, D., Singh, S. K., & Sharma, K. K. (2013). Fungicide efficacy against sheath rot of rice. Journal of Applied and Natural Science, 5(1), 24–29.
10. Mochizuki, H., & Ohki, S. T. (2012). Carbendazim resistance in plant pathogenic fungi and its management implications. Journal of General Plant Pathology, 78, 1–10. https://doi.org/10.1007/s10327-011-0347-0.
11. GRDB (2009). Rice Farmer’s Manual 2009, GRDB. Available online at: http://www.grdb.gy.
12. Tuli. F. U., Hossain, Md. I., Shapla, S. A., Hussain, Md. A., Talukdar, Md. R. B., Kawochar, Md. A., and Ferdous, J. (2017). Efficacy of Selected Fungicides in Controlling Foliar Diseases of Rice (Oryza sativa L.). Journal of Plant Sciences. Vol. 5, No. 6, pp.185-190. doi: 10.11648/j.jps.20170506.13.
13. Balgude, Y.S., Kshirsagar, C.R., and Gaikwad, A.P. (2019). Evaluation on the Efficacy of Modern Fungicides against Blast and Sheath Rot of Rice. Int.J.Curr.Microbiol.App.Sci (2019) 8(3): 83-88. https://doi.org/10.20546/ijcmas.2019.803.013.
14. Kindo, D. K. D., and Tiwari. P. K. (2015). Efficacy of fungicides for the management of sheath rot disease in rice under field conditions. Plant Archives, Vol. 15, No. 1, 119-120 ref. 8. http://www.plantarchives.org/PDF%2015%20-%201/119-120%20(2841).pdf. 
15. Rajnandni., and Tiwari, P.K. (2022). Field evaluation of new molecules against sheath rot disease of rice caused by Sarocladium oryzae. International Journal of Advanced Chemistry Research, 4(2):87-89. 
16. Thrimurty, V.S. (1986). Studies on chemical control of sheath rot of rice. Pesticides. 9: 20-21.
17. Pal, R., Mandal, D., and Naik, B.S. (2015). Screening rice cultivars for resistance against sheath rot disease of rice caused by Sarocladium oryzae. Journal of Interacademicia.19(3):349-354. 
18. Singh, H.S., Kaushik, S.S., Chauhan, M.S., and Negi, R, S. (2019). Efficacy of different fungicides against rice blast caused by Pyricularia oryzae (Cav.) under field condition in Satna district of Madhya Pradesh. International Journal of Current Microbiology and Applied Sciences. 8(06):63-69. 
19. Sawada, K. (1922). Descriptive catalogue of Formason fungi II. CABI. 2:27-31. 
20. Ou, S.H. (1985). Rice. Disease 2nd ed. Common wealth Mycological Institute, Kew. Survey, U.K. 368-380.
21. GRDB (2025). Draft Technical Annual Report, Plant Pathology Department, GRDB. 
22. Mandal, D., Pal, R., and Mohapatra., S. (2024). Field evaluation of some novel fungicides for the management of sheath rot disease in rice. International Journal of Advanced Biochemistry Research. SP8(10):907-909. https://doi.org/10.33545/26174693.2024.v8.i10Sk.2583.
23. IRRI, INGER. (2013). Standard Evaluation System (SES) for Rice. IRRI, Manila, Philippine: INGER Genetic Resources Center.
24. Baker, E.H. (2026). Socioeconomic Status, Definition. In The Wiley Blackwell Encyclopedia of Health, Illness, Behavior, and Society (eds W.C. Cockerham, R. Dingwall and S. Quah). https://doi.org/10.1002/9781118410868.wbehibs395.pub2.