Efficacy of several new fungicides in control of tomato early blight disease

Document Type : Research Paper

Authors

1 Plant Diseases Research Department, Iranian Research Institute of Plant Protection, AREEO, Tehran, Iran.

2 Plant Protection Research Department, Hormozgan Agricultural and Natural Resources Research and Education Center, AREEO, Bandar Abbas, Iran.

3 Plant Protection Research Department, Fars Agricultural and Natural Resources Research and Education Center, AREEO, Shiraz, Iran.

Abstract

Tomato early blight caused by Alternaria alternata, A. tenuissima and A. solani, occurs in a wide range of environmental conditions. Effectiveness of fluxapyroxad+difenoconazole (Dagonis® SC12.5%), tetraconazole+azoxystrobin (Affiance® SC17%) and mandipropamid+difenoconazole (Carial Star® SC 50%) fungicides were evaluated in the control of tomato early blight disease in comparison with boscalid+pyraclostrobin (Signum® WG33.4%) fungicide. Dagonis® at the rates of 800, 1000 and 1200 ml/ha, Affiance® 450, 600 and 750 ml/ha, Carial Star® 400, 550 and 700 ml/ha and Signum® 500 gr/ha and the control group (no fungicide application). The experiments were carried out under the field condition in Fars and Hormozgan provinces, and under greenhouse condition in Alborz province. The disease severity index and area under the disease progress curve were calculated. The results showed that Affiance® at the rates of 600 and 750 ml/ha with 48-82% efficacy, Dagonis® at the rate of 1200 ml/ha with 50-70% efficacy and Signum® at the rate of 500 gr/ha with the efficacy of 48-75% were effective in controlling tomato early blight disease. Although Carial Star® fungicide with the amount of 700 ml/ha was less effective (45-55%) as compared to aforementioned fungicides, but its average efficiency can be justified. Therefore, Affiance®, Dagonis® and Signum® fungicides, at the rates of 600, 1200 ml/ha and 500 gr/ha, respectively, and Carial Star® fungicide (in the early stages of the disease) at the rate of 700 ml/ha are recommended to control tomato early blight disease.

Keywords

References

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Journal of Applied Research in Plant Protection
Volume 13, Issue 1
April 2024
Pages 59-71

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History

  • Receive Date: 10 June 2023
  • Revise Date: 06 September 2023
  • Accept Date: 08 September 2023

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