Control techniques of diseases and insect pests in Polygala tenuifolia

Polygala is also known as grass, class Ye Yuanzhi, mountain tea and so on. As a commonly used traditional Chinese medicine, it was first recorded in the Classic of Shennong Materia Medica, listed as a top grade, and is regarded as a vital medicine, with the function of calming the mind, dispelling depression and resolving phlegm, and is vulnerable to the harm of diseases and insect pests in the process of its growth. let's take a look at Yuanzhi's pest control technology.

Root rot disease

[harmful characteristics] in the early stage of root rot, the root and rhizome turned brown and rotted, the base of petiole became brown, prismatic or oval, and finally the base of petiole rotted, the leaves withered and the rhizome rotted.

[prevention and treatment methods] early detection and burning, disinfection of the disease point with 10% lime water, spray irrigation with 1000 times of 50% carbendazim at the initial stage of the disease, spray once every 7-10 days, and spray 2-3 times in a row.

Leaf blight

[hazard characteristics] the lower leaves of the plant began to get sick and gradually spread upward, and brown round spots appeared on the leaf surface at the initial stage of the disease, then the disease spots continued to expand, the central part was grayish brown, and finally the leaves scorched and the plant died.

[control method] the mancozeb was sprayed on the leaves with 1000 times of mancozeb or Trichoderma, usually once every 7 days, and the harm could be controlled twice.

Aphids

[damage characteristics] the tender leaves of the plant were damaged from late May to early June.

[control method] it can be sprayed with 2000 times of dimethoate emulsion, once a week and twice a week to control its damage.

Douyuanqing

[damage characteristics] it occurred from June to August, causing damage to leaves and tender stems.

[prevention and control method] spray with 5-10 mg / L enemy, spray twice in a row, every 5-7 days, all can be killed.