Capsella bursa-Pastoris (L.) Medic. Alias ​​nurse grass, water chestnut vegetables. Is a cruciferous one-year-old herb. Use whole plant medicine. With cooling blood to stop bleeding, heat diuretic effect. National distribution.
Symptoms of the whole plant lesions, diseased plant leaves pale, appeared light mosaic, and some external leaves yellow spotted plants slightly dwarfed.
The pathogen Cucumber mosaic virus is abbreviated as CMV. It is called cucumber mosaic virus and belongs to virus. Cucumber mosaic virus host range 39 families 117 species of plants, virus particles spherical, diameter 28-30nm. Virus sap dilution limit 1000 to 10000 times, passivation temperature of 60 to 70 °C, 10 minutes, in vitro survival of 3 to 4 days, intolerance to dry, indicating plant normal smoke, heart smoke and mandala systemic flower Leaves, systemic mosaics also appear on cucumbers.
Transmission routes and disease conditions Viruses live on living host plants over winter and can be transmitted by sap and insects. In addition to cotton aphid and peach aphid, insect vectors also have various aphids, such as vegetable aphid and corn aphid, but they are non-persistent. The soil cannot spread, and seed propagation is possible, but the magnitude of its role is not yet clear. Any existence of weather conditions and field ecological conditions that are conducive to the propagation of pests and insects, as well as activities, are beneficial to the occurrence and development of this disease.
Control methods see Laiwu mosaic virus disease.
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