Shell-shaped white shield, also known as Cox's white shield. It is the main pest of greenhouse flowers in the wild in the South and in the North. There are oleander, white orchid, evergreen, azalea and other pests. Form: Shell: Female shell pear-shaped or nearly round, relatively flat, white, opaque, shell point in the front. The male shell is slender with three longitudinal ridges on the back. Adults: The female adults are nearly elliptical and the back of the body becomes narrow. Shell-shaped white shield meal is divided into two types of branches and leaves. Control methods: 1 manual brushing. 2 After the eggs hatched, they were spray-treated with 40% omethoate 1000-fold and 50% malathion 1000-fold spray. Organic stevia extract is a natural sweetener extracted from the pure leaves of the stevia plant. Stevia extract is a natural sweetener and a natural substitute for artificial sweeteners such as aspartame, saccharin, and sucralose. They are all zero-calorie sweeteners, but stevia is a natural source and has no industrial residues.
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Occurrence pattern: 3 generations a year, wintering with fertilized female adults. The first generation spawned at the end of March, the eggs hatched in mid-April, and the male nymphs emerged in late May. The second generation spawned at the end of June and hatched in early July. The males of the upper sentence of the eighth month were born. The third generation of spawning in September, hatching eggs in late September, adult emergence in late October.