Results in histological and ultrastructuralstudies showed that the larvae treated by the extract caused notable changes tothe mid-and hind-intestine cells,the epidermis cells,silk gland, the wingbuds, Malpighian and fat body.

• 石蜡切片观察发现，中肠肠壁细胞、后肠、脂肪体、丝腺、翅芽、马氏管、表皮等部位出现病理变化。 电镜观察，表皮层片层结构、真皮细胞、中肠肠壁细胞、脂肪体细胞均受到不同程度的影响。