There are more than 100 species of tea disease recorded, and more than 30 species are common.
First, there are nearly 40 species of leaf disease recorded.
The main diseases of green leaf sprouts are tea cake disease, which occurs in high mountain tea gardens in the southwestern tea area. Tea alzheimer disease and Chayuan's disease are caused by high-altitude tea gardens in eastern and southwestern provinces. Disease is one of the most important diseases in Zhejiang, Hunan and other provinces.
Diseases such as leaf blight, tea leaf spot disease, tea anthracnose, tea-brown leaf spot disease, tea coal disease, and tea leaf spot disease often occur in tea areas in China. The diseased leaves easily fall off, causing the tree vigor to decline.
Stem disease has been found in about 30 species. The main types of tea breaks commonly occurring in various tea areas are tea shoot black spot disease, tea blight, tea grey plaster disease, tea tree black shank disease and tea tree moss and lichen. There are tea tree cancers in the southwestern tea area. In southern China, Anhui, and Hunan, there are erythroderma, tea black rot and tea rot.
There are more than 30 recorded root diseases.
The main types of tea root-knot nematode disease, tea white peony disease, tea root rot. Often the whole plant died.
Root-age diseases include red root rot, brown root rot, blackroot and purple root rot.
Second, fewer species of flowers and fruit diseases.
Only flower rot (Botrytis cinerea) occurs more commonly. The fruit diseases are leaf blight and rotavirus.
Tea tree is a kind of perennial evergreen crop. After matured, the crowns are densely closed, the microclimate is of small amplitude, the environmental conditions are more stable than other crops, and the pathogenic microflora is correspondingly more abundant. Many tea diseases pose a serious threat to some regions. In tea areas with higher altitudes, tea cake disease, tea leukosis disease, tea circle disease and other low-temperature and high-humidity diseases are the main diseases. Tea root rot, tea black rot, and tea thread rot are more serious in tropical and subtropical tea regions in the south. Nowadays, the large amount of nitrogen fertilizers has changed the composition of amino acids in the tea tree. The tea tissue structure is soft, which is conducive to the infection of pathogenic bacteria and increases the number of leaf diseases.
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