Publications by authors named "Fang-Rui Guo"
Background: The rice stem borer, Chilo suppressalis Walker (Lepidoptera: Crambidae), is a damaging pest of rice worldwide. Following the evolution of C. suppressalis resistance to diamide and abamectin insecticides, emamectin benzoate (EB) became a key insecticide for the control of this species in China.
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- * The study identified five FMO genes and found that specific genes (FMO3B and FMO3C) were overexpressed in field populations resistant to treatments like chlorantraniliprole and spinetoram, but not to all insecticides.
- * Molecular studies confirmed that these FMOs directly bind to certain insecticides, contributing to metabolic resistance, highlighting their importance in developing effective pest management strategies.
Article Synopsis
- The rice stem borer is developing resistance to key insecticides, posing a challenge for its control and management in agriculture.
- Research on 126 populations from China showed moderate to high resistance to four main insecticides, revealing genetic mutations linked to this resistance.
- Understanding these resistance mechanisms, including both target-site mutations and nontarget mechanisms like enzyme overexpression, can aid in developing effective and sustainable pest management strategies.
Article Synopsis
- The rice stem borer (RSB), a major pest in China, has developed significant resistance to commonly used insecticides, prompting the investigation of a new insecticide, tetraniliprole, which is effective against RSB.
- In a study, a tetraniliprole-selected strain (Tet-R) of RSB showed rapid development of resistance with a heritability score of 0.387, alongside a significant fitness cost.
- Genetic analysis revealed multiple mutations in the ryanodine receptor (RyR) associated with cross-resistance to both tetraniliprole and another insecticide, chlorantraniliprole, providing insights for better resistance management strategies.