Common Pests of Hibiscus and Their Control Methods

Red Spider

It mainly harms the back of leaves.

Prevention and control methods: After discovery, wash the whole plant with water, and then spray the mite-killing agent, such as Mite-Clean, Mite-Keeper, etc.

Whitefly

It mainly parasitizes on the back of leaves, piercing into the leaf flesh to suck its juice, which will cause the leaves to curl, turn green and yellow, or even dry up and fall off.

Prevention and control methods: Spray with 1500 to 2000 times diluted 25% cypermethrin wettable powder, and spray again after 15 days depending on the insect situation, or spray with 2000 times diluted 10% imidacloprid wettable powder. As long as the adults and larvae are killed, the dirty mold layer on it will soon disappear as you increase ventilation and light, and spray water repeatedly. Under home cultivation conditions, when the adult insects are flying around, you can try spraying them with mosquito repellent, then gently wipe off the mold layer on them with a wet cloth, strengthen water and fertilizer management, and the plants will quickly recover.

Scale insects

It mainly harms stems, petioles, etc., and has different sizes, colors, and shapes, such as round and oval.

Prevention and control methods: You can use a toothbrush to brush it off or wipe it clean with a rag, or you can spray laundry detergent, wind oil, or pesticides such as cypermethrin for prevention and control.

Root-knot nematode disease

When observing the above-ground part of the disease, the leaves initially grow weak, reddish-brown spots appear on the edges and spread inward, and later the leaves dry up and fall off. If you observe from the underground part, you will find large and small nodules appearing between the roots of the plant. They are smooth and flesh-colored at first, and rough and brown in the later stage.

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