Effects of the insecticide triazophos on the ultrastructure of the flight muscle of the brown planthopper Nilaparvata lugens Stål (Hemiptera: Delphacidae)

► The insecticide triazophos affects the ultrastructure of the flight muscle of the brown planthopper. ► Triazophos enlarged the diameter of the myofibrillar. ► Triazophos increased the sarcomere length and the percentage of mitochondrian volume in the myofibrillar.