Photo 1 2: It is suggested to check the root system. The photos provided in Figure 3 consider the defoliation caused by the damage of the navel orange red spider, which mainly damages the leaves, and the leaves turn yellow after being damaged, which affects photosynthesis. When the damage is serious, the leaves are grayish white and lose their luster, resulting in fallen leaves, fallen fruits and dead branches, which seriously affects the tree potential and yield. The reason why Starscream is difficult to fight is that it breeds quickly and has many generations. There are many phenomena of manual pesticide spraying. Some fruit trees are old, and uneven pesticide spraying and some branches and leaves are often missed. Some fruit farmers are caught in the rain after pesticide spraying. The activity of acaricide is affected by temperature to varying degrees, so the dosage should be increased appropriately in low temperature season or when the population density of spider mite is too high. There are also acaricides used together with alkaline preparations. Several products can be selected for controlling red spider: 25%, 30% and 45% bifenazate etofenuron compound diluted by 2,000 times or 30% etofenapyr diluted by 4,000 times, or bifenazate phenylbutatin compound or profenofos plus lufenuron diluted by 2,000 times respectively.