月季在开花期间,常有以下几种金龟子啮食花朵及花蕾,严重影响植株观赏。小青花金龟子:成虫体长11～14毫米,呈暗绿色、无光泽,在5～6月大量出现,造成月季花瓣残缺不全;白星金龟子:成虫体长20～24毫米,紫黑色有光泽,在5～6月群集于月季花蕾;豆蓝花金龟子:成虫体小,仅6～7毫米,在6～8月大量出现;四纹 Rose during flowering, often the following beetles feed on flowers and buds, seriously affecting plant ornamentation. Small blue-and-white beetle: adult body length 11 ~ 14 mm, dark green, dull, appeared in large numbers from May to June, resulting in rose petals incomplete; white chafer: adult body length 20 to 24 mm, purple black shiny, From May to June, they clustered in the rose bud; bean blue-and-white beetle: adult body was small, only 6 ~ 7 mm, appeared in large quantities from June to August;