茶花虽然枝粗叶壮,抗虫害的能力较强,但虫害也常有发生,有时还很严重。常见的害虫有:一、介壳虫该虫的体积虽小,对茶花的危害却大,一旦发生,密布枝叶,处处皆是,令人头痛。介壳虫的种类很多,常见的有糖片盾介、红蜡介、吹棉介等几十种。今举糖片盾介为例加以讨论:1.糖片盾介的形态雌性成虫:虫体近圆形,长约1mm,表皮紫红色,介壳约2mm 长,呈椭圆状,壳色灰白或灰褐黄色,中央隆起,介壳边缘呈棕色或黄色。雄性成虫:虫体表面淡紫色,翅膀一对,足有三对,腹末具针状交尾器,介壳细而长,灰白色,中部扁而端狭长。2.糖片盾介的发生期和危害状况(见下表) Camellia, although thick branches and leaves strong, strong pest resistance, but pests often occur, and sometimes very serious. Common pests are: First, scale insects The size of the insect is small, but the harm to the camellia is large, in the event, dense foliage, everywhere, it is a headache. There are many kinds of scale insects, common are sugar shield mediated, red wax mediated, blowing cotton mediated dozens of species. Now take the sugar shield as an example to discuss: 1. Sugar shield mediated morphological female adults: parasites nearly round, about 1mm, epidermal purple, shell about 2mm long, oval-shaped, shell color gray or gray Brown yellow, central bulge, shell edge was brown or yellow. Male adults: larvae on the surface of the larvae, a pair of wings, enough to have three pairs, abdominal acupuncture at the end with a thin and long shell, gray, central flat and narrow side. 2 sugar shield mediated the occurrence and damage status (see table below)