Tricyclazole – A Specialized Solution For Rice Blast Disease Control

Tricyclazole is a fungicidal active ingredient specifically developed for the control of rice blast disease, originally developed by Elanco (formerly part of Bayer) and commercialized since the 1970s. Thanks to its high efficacy and stability under unfavorable weather conditions, Tricyclazole has been widely used for decades in major rice-producing countries.

KEY APPLICATIONS

• Effectively controls rice leaf blast and neck blast.

• Particularly suitable for preventive and early-stage applications, helping to limit disease spread and minimize yield losses.

SPECIFIC MODE OF ACTION

Tricyclazole inhibits melanin biosynthesis in the appressorium of the rice blast fungus (Magnaporthe oryzae). Melanin is essential for the fungus to generate the pressure required to penetrate plant tissues. Without melanin, the pathogen cannot infect the rice plant, providing protection from the early stages of infection.

KEY ADVANTAGES

• High selectivity and safety: Targets only the rice blast pathogen, safe for young tissues and panicle necks, and suitable for Integrated Pest Management (IPM) programs.

• Stable performance: Low wash-off risk, effective under humid, rainy, and foggy conditions.

• Long-lasting protection: Helps maintain healthy plant growth and reduces the risk of reinfection during critical growth stages.

• Easy to mix and rotate: Compatible with other fungicide groups, suitable for intensive and high-quality rice production systems.

IMPORTANT NOTES FOR USE

• Narrow spectrum: Tricyclazole is specific to rice blast and does not control other fungal diseases; rotation or combination with other fungicides is recommended when multiple diseases are present.

• Early application is critical: Best results are achieved when applied preventively or at early infection stages; additional measures may be required if disease pressure is high.

• Resistance management: Avoid continuous use over multiple seasons; rotate active ingredients according to FRAC guidelines to reduce resistance risk.

CONCLUSION

Tricyclazole remains a reliable and proven solution for rice blast management, especially in regions where weather conditions favor disease development. Proper timing and correct application are key to protecting yield and ensuring stable rice quality.