There were 23 sensitive strains (79.3%), 6 slight resistant strains(20. 7%)and no signficant resistant strains in 29 Rhyzopertha dominica.

• 无显著抗性品系； 29个谷蠹品系中，敏感品系23个，占79.；3%25，轻度抗性品系6个，占20