Prevention and control of primrose mosaic disease
The symptoms occurred in the whole plant. The leaves are small, deformed, with dark green markings and yellowing. The diseased plant does not blossom, even if it blossoms, there are markings on the flowers, and the flowers are short and deformed.
The pathogen is cucumber mosaic virus CMV. There are more than 190 species of dicotyledonous and monocotyledonous herbs and woody plants belonging to 45 families, such as Cucurbitaceae, Solanaceae, Compositae, Cruciferae, Rosaceae, Liliaceae and so on.
There are more than 80 kinds of aphids in the route of transmission, but the main transmission vectors are peach aphid and cotton aphid. The source of infection is mainly surrounding weeds.
Prevention and cure method
1. Remove weeds in time and reduce the source of infection.
2. Early prevention and control of aphids and elimination of virus vectors.
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Brief introduction of Primula
Scientific name: Primudaspp. Alias: Primrose (Japanese name), Primulaceae: Primulaceae and Primula are widely cultivated in the world and have a long history. They have developed rapidly in recent years and have become a kind of important garden flowers at present. Both the middle name and the scientific name Primula have the meaning of early flowering. Flowering in early spring is an important characteristic of this genus. Cultivation history of primroses: according to local records and the traditional custom of Yunnan folk planting primroses in pots for Spring Festival appreciation. Tibetan primroses in China
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Brown spot disease of primrose and its control
The symptom of primrose brown spot disease: it often occurs in the four seasons. It is caused by Alternaria of the subphylum Alternaria. There are brown spots on the leaves of infected plants. The route of transmission is that conidia are transmitted by wind and rain. Prevention and treatment: spray 70% chlorothalonil wettable powder 1000 times liquid and other fungicides at the initial stage of the disease.
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