A Detailed Guide to Common Pests and Diseases of Dwarf Lilyturf (Ophiopogon japonicus) and Their Control Methods
Dwarf lilyturf (Ophiopogon japonicus) is one of the commonly used traditional Chinese medicinal herbs in China. It has the effects of clearing heat, moistening the lungs, nourishing the stomach, and promoting fluid production to quench thirst. Its effects are powerful, and it is widely used. It is cultivated in many regions of China and is a crop that combines both medicinal and economic value. During its cultivation, pests and diseases are an important factor affecting its yield. Below, Qinnong Web brings you the common pest and disease control methods for dwarf lilyturf.
1. Black spot disease
Black spot disease mainly begins to occur in April, and is especially severe during the rainy season. In the early stage of the disease, the leaves begin to turn yellow and gradually spread toward the base of the leaves, producing irregular lesions 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 pathogen the following year.
Control methods: Select varieties with strong growth and strong disease resistance for planting. Before planting, disinfect the soil and seeds to eliminate the pathogen from the source as much as possible. When disease is found, remove the diseased leaves promptly and burn them in a centralized manner. Spray with Bordeaux mixture or carbendazim to disinfect.
2. Root-knot nematode
As can be seen from the name, the root-knot nematode harms the roots of dwarf lilyturf. It is relatively small in size and harms 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 again infected by the root-knot nematode, forming small root knots. In this way, it gradually spreads through the entire root system, affecting plant growth.
Control methods: Avoid continuous cropping; it is best to implement crop rotation, but the rotation should be done with grass-family crops and as far as possible not with other crops, otherwise it will be counterproductive. Select healthy, disease-free seedlings for planting. When planting, cut off the old roots, which can prevent them from carrying pests. Disinfect and exterminate pests in the planting soil before planting.
3. Mole cricket
Mole crickets mainly harm seedlings. Both adults and larvae can harm plants, feeding on seedling roots. They often gnaw the seedling roots completely clean, causing the plants to wither and die. They are mostly active at night and have phototaxis and coprophagy.
Control methods: Before planting, while turning the soil, dilute phoxim emulsifiable concentrate and spray it on the soil, then turn the medicated soil into the ground. This can kill insect eggs to a certain extent. During the plant growth period, mix phoxim granules or isofenphos-methyl granules with fine soil and spread them evenly on the soil.
The above are the common pests and diseases of dwarf lilyturf and their control methods. I believe everyone now has some understanding of the pests and diseases of dwarf lilyturf and their control methods. For more related agricultural knowledge, please stay tuned to Qinnong Web.