A Detailed Guide to Common Pests and Diseases of Panax japonicus and Their Control Methods

Panax japonicus is a common medicinal herb and a type of ginseng. Current production comes mainly from wild sources, but in recent years there have been signs of artificial cultivation, with related techniques already taking shape in places such as Yunnan. Now let's take a look at some of the diseases related to Panax japonicus!

1. Root rot

Root rot, a common disease of plants, is unavoidable for Panax japonicus as well, with the main affected areas concentrated in the root system and the rhizome near the ground surface. Outbreaks mostly occur in hot and humid seasons, triggered by long-term exposure to rain, and the root system shows obvious changes. In the early stage, the roots are rust-red and show no signs of decay, but as the disease worsens they can turn decayed and black. Carbendazim is commonly used for treatment.

2. Damping-off

This mostly occurs during the seedling stage and directly causes seedling death; it is a disease caused by pathogen infection. The cause is that the seedlings have external wounds, and the soil layer happens to contain the pathogen, so over time the pathogen enters the wounds and infects the seedlings. The seedlings first change color and then gradually wither; if the yellowish-brown spots on the plant grow larger and larger, it means the plant is affected. To prevent and control it, drench the affected areas with oxadixyl, cymoxanil and copper octanoate, applied by pouring it in from the roots.

3. Blight

Blight is a general term, and each plant has its own corresponding blight situation; it mainly hinders leaf growth and causes the leaves to turn yellow and wither. In the blight of Panax japonicus, water-soaked spots of an unusual color appear on the leaves, then slowly spread, and the centers of the spots gradually turn yellow and withered, finally spreading through the whole plant, after which the plant becomes weak and gradually dies. Bordeaux mixture can be used for prevention and control.

4. Mole crickets

This pest problem is mostly due to larvae of this kind lurking in the planting site and the grower not carrying out the corresponding pest removal treatment, so the larvae gradually breed and eat into the plant roots in the soil layer. This kind of pest problem can occur multiple times a year, and the adults will lay eggs in the soil again, causing greater damage than the first time. The first occurrence is concentrated in early summer, around May, and farmers can mix phoxim granules into the soil to kill the mole crickets or their larvae.

The above are some of the common pests and diseases of Panax japonicus and their control methods. You can refer to these treatment methods above so that you have one more option ready and can grow them even better later on!