Publications by authors named "Li-Qi Zhou"
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 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
- Researchers studied how Chilo suppressalis, a pest in China, developed resistance to diamide insecticides like chlorantraniliprole from 2016-2018, linking this resistance to specific mutations in the RyR gene.
- The study identified several key mutations, including I4758M and Y4667D, and confirmed that these mutations significantly increased resistance to various diamide insecticides in genetically modified fruit flies.
- The findings enhance our understanding of insect resistance mechanisms and highlight the importance of target-site mutations in the RyR gene for managing pest resistance to diamide pesticides.
Article Synopsis
- The study evaluated the sensitivity of three field populations of pink stem borer (PSB) to diamide insecticides, chlorantraniliprole and flubendiamide, and found that they remained responsive to these chemicals even after several years of exposure.
- Researchers cloned and characterized the full-length ryanodine receptor (RyR) gene (named SiRyR) from PSB, which is crucial for the action of diamide insecticides, revealing significant sequence similarities to RyRs in other insects.
- The analysis indicated that SiRyR expression was highest in pupae and adult males, particularly in the thorax, providing valuable insights for future studies on insecticide development and PSB biology.
Article Synopsis
- The rice stem borer (Chilo suppressalis) is a major pest affecting rice crops in Asia, and chemical pesticides are the primary method for managing this pest.
- There are significant variations in resistance levels to different insecticides among field populations, with one population (YY14) showing moderate resistance to two specific insecticides.
- A mutation in the ryanodine receptor gene (G4910E) in the resistant population suggests a genetic basis for this resistance, highlighting the need for effective insecticide resistance management strategies.