Watermelon is affected by several pathogens and pests such Fusarium wilt, gummy stem blight, and root-knot nematode that are frequently controlled by succinate dehydrogenase inhibitors (SDHIs). As these compounds provide the opportunity to control multiple diseases, scientists from North Carolina State University compared the sensitivity of the different pathogens to various SDHIs. Significant positive correlations between the sensitivity of Fusarium wilt and gummy stem blight for several SDHIs indicate a potential for cross-resistance against the fungicides. The findings suggest cyclobutrifluram may be used for managing root-knot nematode, but should be used judiciously for Fusarium wilt and gummy stem blight.
For further reading:
- Sensitivity of Meloidogyne incognita, Fusarium oxysporum f.sp. niveum, and Stagonosporopsis citrulli to succinate dehydrogenase inhibitors used for control of watermelon diseases.
by: Tsz Wai Wong and Lina Quesada-Ocampo
Published in Plant Disease on January 19, 2024.