What are the common pests and diseases of dwarf lilyturf (Ophiopogon japonicus)? A detailed guide to prevention and control methods

Dwarf lilyturf (Ophiopogon japonicus) is a common traditional Chinese medicinal herb for clearing heat, moistening the lungs and promoting fluid production. It has a very wide range of uses and is a crop that combines medicinal and economic value. During cultivation, it is relatively prone to pest and disease infestation. So what are the common pests and diseases of dwarf lilyturf? What prevention and control methods are there?

I. Black spot disease

Black spot disease mainly begins to develop in April, and is especially severe during the rainy season. In the early stages of the disease, the leaves begin to turn yellow and the discoloration gradually spreads toward the base of the leaves, producing irregular spots of various colors, until the leaves slowly wither, affecting plant growth. Its pathogen is relatively resilient, can withstand low temperatures to overwinter, and becomes a new source of infection the following year.

Prevention and control methods: Select robust varieties with strong disease resistance for planting. Before planting, disinfect the soil and seeds to eliminate the pathogen at the source as much as possible. When disease is found, promptly remove the diseased leaves and burn them in a centralized manner, and spray with Bordeaux mixture or carbendazim to disinfect.

II. Root-knot nematodes

Root-knot nematodes, as the name suggests, damage the roots of dwarf lilyturf. They are small in size and damage the plant roots by forming root knots of varying sizes. These root knots then grow fibrous roots, and the tips of these fibrous roots are in turn infected again by root-knot nematodes, forming small root knots. In this way, they gradually spread throughout the entire root system, affecting plant growth.

Prevention and control methods: Avoid continuous cropping; it is best to practice crop rotation, but the rotation should preferably be with grass-family crops, and as far as possible not with other crops, otherwise the result will be counterproductive. Select healthy, disease-free seedlings for planting. When planting, cut off the old roots, which can prevent carrying nematodes, and disinfect and eliminate pests in the planting soil before planting.

III. Mole crickets

Mole crickets mainly harm seedlings. Both adults and larvae can damage plants, feeding on seedling roots, often gnawing the seedling roots completely clean, causing the plants to wither and die. They are mostly active at night and are attracted to light and to manure.

Prevention and control methods: Before planting, while turning the soil, dilute phoxim emulsifiable concentrate and spray it on the soil, then turn the treated soil into the ground, which can kill insect eggs to a certain extent. During the plant growth period, mix phoxim granules or methyl isothiophos granules with fine soil and spread evenly over the soil.

The common pests and diseases of dwarf lilyturf are as described above. We hope growers can prevent and control pests and diseases in a timely manner to ensure the harvest of dwarf lilyturf.