The pepper industry is one of the rich and income-increasing industries in Gannan, Tianshui and Linxia in Gansu Province. However, pepper gum disease has become one of the main bottlenecks in the healthy development of this industry. According to the survey, the incidence rate of pepper prickly disease in the pepper producing area of ​​Gansu Province is generally 20% to 50%, and the incidence rate of severe pepper garden is as high as 100%. Now is the season to control the disease of pepper, the author on the prevention and treatment of pepper disease, the following suggestions, for the majority of pepper growers reference.

First, the symptoms of pepper disease

The pepper gum disease is also called dried pepper rot, which is an ascomycete fungal disease. The disease occurs mostly in the pepper trees cultivated in stagnant water and wet blocks, mainly for the trunk of the pepper tree, especially the neck base of the trunk. The symptoms were not obvious at the initial onset, but reddish-brown lesions appeared at the site of the disease. With the enlargement of the lesions, the diseased part was wet and rotted, the epidermis was slightly depressed, and accompanied by flow glue. After that, the lesion gradually turned black, and the surface of the diseased part was shrunk and cracked. Due to the decay and dryness of the diseased parts, the nutrient transport of the tree is not smooth, causing the leaves of the diseased side to yellow and wilting, and even the upper branches of the lesions are dry and dead, and the whole plant is dead.

Second, the route of transmission and disease conditions

The pathogen is overwintered in the diseased part by mycelium and propagule. At the beginning of May, when the temperature warmed up, the old lesions began to expand and expand. From June to July, the conidia produced by the diseased parts spread by wind and rain and irrigation water. Under natural conditions, most of the pepper trees that are harmed by Gideon have a gum disease. Under normal circumstances, the pepper garden is warm and humid, and the incidence of old trees is high. The disease-resistant varieties of bean pepper and wild dog pepper have mild or no disease.

Third, prevention and treatment measures

1. The pepper garden should be drained in time for rain; the old pepper garden should be replaced by soil, that is, the old soil under the tree should be removed in the autumn, and the roots should be cultivated 40 cm.

2. Strengthen cultivation management to avoid mechanical damage to trees in farming operations.

3. Chemical control. In the occurrence period of the jalapeno of the pepper tree, the trunk is used to spray the insects with 50% omethoate emulsifiable concentrate and the same amount of diesel. After one week, spray 70% thiophanate-methyl 800 times to improve the disease control effect.

4. Scratch the lesions. Scratch the lesions with mild incidence on the branches, and apply the curd or stone sulphur mixture at the wound.

5. Grafting prevention. The use of pepper trees with developed roots and strong disease resistance as rootstocks and grafting of Dahongpao with excellent economic characteristics can not only increase the yield of pepper, but also reduce the occurrence of gum disease. The grafting method can be used for bud grafting, branching and docking, and the disease-resistant pepper tree species can also be used for gardening, and then the high-replacement head can also achieve good disease prevention effect.