Causes of Scrophularia Root Drying Up and the Latest Control Methods

Scrophularia uses its rhizome as medicine. Because of its low planting cost, simple management, pest and disease control and watering, and its economic value, it is cultivated in many regions. But recently many growers have reported that their Scrophularia has dried up, so what is causing this? How can it be effectively solved? Follow the editor to take a look.

I. Causes of Scrophularia Drying Up

First the leaves appear wilted and drooping, then the whole plant dries up, the leaves and stems turn black, and when the roots of the plant are dug out, no obvious disease characteristics are found. There are completely no disease characteristics of root rot, southern blight, or leaf blight, so pathogen damage is basically ruled out, and the cause can only be sought in physiological disorders. Through observation it was found that the soil where Scrophularia is planted in this area is sandy soil, and areas with sparse plants in the field are prone to the disease, while denser plants grow normally, so it can be concluded that the drying up and death of Scrophularia is not caused by disease, but by the weather factor of high temperature and drought.

II. Control Methods

1. Prevent in advance

Sandy soil has poor water and fertilizer retention capacity. When planting a rhizomatous medicinal herb like Scrophularia, more organic fertilizer must be applied to increase the organic matter content in the soil. In dry years, some chopped wheat straw can be spread between the ridges, which can prevent soil moisture loss and provide excellent water and fertilizer retention capacity. Especially for sandy soil, preparations must be made in advance.

2. Scientific irrigation

In high-temperature seasons, when drought occurs, irrigation should be carried out in time, because this is precisely the most critical period for the growth of various crops, and without the nourishment of water, yield losses are bound to occur. For sandy soil, drip irrigation or sprinkler irrigation is recommended, as this can replenish water in small amounts and multiple times. If the traditional flood irrigation method is used, it not only wastes labor, fertilizer and water, but also causes faster loss and evaporation and poorer moisture retention.

3. Chemical agents

Although the symptoms are caused by high temperature and drought, in order to improve the ability of Scrophularia to resist drought, it is recommended that farmers spray some regulators such as brassinolide, indolebutyric acid, sodium nitrophenolate, and diethyl aminoethyl hexanoate, using any one of these regulators together with humic acid foliar fertilizer. This can not only promote a well-developed root system in Scrophularia and improve the plant's ability to resist harsh weather, but after adding humic acid foliar fertilizer and spraying, it can also regulate the transpiration of the leaves. Combined with irrigation, it can play a decisive role in helping Scrophularia safely pass through high-temperature and drought weather.

The above is an introduction to the causes of Scrophularia drying up and the control methods. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.