Impatiens mosaic disease
Impatiens mosaic disease is common in Shanghai, Guangzhou, Nanning and other places in China.
[pathogen] Cucumber mosaic virus (Cucumbermosaicvirus,CMV), see Gladiolus virus disease.
[symptoms] the new leaves at the top of the plant produce flowers and leaves, sometimes deformed; when they are serious, the apical tips are clustered and the plants are short.
[incidence regularity and epidemic characteristics] the virus has a wide host range, and there are more than 60 species of aphids, including peach aphid, cotton aphid, corn aphid (Aphismaidis) and so on. Juices are easy to spread, and so can dodder. The occurrence of the disease is closely related to the growth and decline of aphids, and when aphids occur, the mosaic disease is also more serious.
[prevention and control measures] A. Timely removal of diseased leaves or diseased plants to reduce the source of infection. b. Do a good job in aphid control. During the occurrence of aphids, 3000 times of 50% aldicarb wettable powder or 1000 times of 50% malathion EC can be sprayed for control.
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Impatiens red diamondback moth
DeilephilaelpenorlewisilButler is the main pest of Impatiens balsamina, which is distributed in Northeast, North, East and Northwest China. The host not only has impatiens, but also has autumn orchid, grass flower and so on. The insect feeds on leaves in the form of larvae, which affects the growth and development of plants, and is the main pest of impatiens. Morphological characteristics the adult is 33-40 mm long and the wingspan is 55-70 mm. Wings and body are red
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Prevention and control of impatiens mosaic disease
The symptoms occur in the rhizome. At first, it became brown and constricted at the rhizome, and then caused the symptom of standing blight. General flower beds in the rainy season, potted flowers are too wet, the disease is more. Pathogen PhytophthoranicotianaevanBredadeHaanvar.parasitica (Dastur) Waterhouse transmission route and disease conditions the pathogen overwintered in the soil in seeds or in the form of mycelium and oospore.
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