(1) Locust: Mainly harm the young leaves and buds of Dendrobium nobilis, piercing the epidermis with sucking mouthparts to suck the nutrient of the juice of the plant, causing the leaves and new buds to deform and wither, and at the same time, it can also cause diseases to invade. Prevention methods: strengthen ventilation, improve the cultivation environment, combined with drug spraying, can be used 20% cypermethrin 1500 times, 40% omethoate 1000 times spray control.

(2) Scale insects: common pests in the cultivation of Dendrobium mainly parasitic in the dorsal or leaf sheath. Occurs in environments with low humidity and poor ventilation. In the early stage of damage, yellow leaves affect the photosynthesis, and in severe cases, the plants die or they cannot grow and flower normally. In addition to enhanced ventilation, when a small amount occurs, it can be brushed off with a soft brush. Drug control using 50% of malathion or 25% of diarrhea net 800 ~ 1000 times spray once a week, continuous spraying 3 to 4 times.

(3) snails and slugs: long-term wet or rainy season is more common. Climb out sprouts or apical roots of Dendrobium at night, causing serious growth obstruction. Weeds and mosses can be removed from the ground; when a small amount occurs, manual killing at night or lime and lime on the ground and corners can be used. When a large area occurs, 80% clomazone or 90% trichlorfon can be used for treatment.

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