Disease Rule and Control of Kale Virus Disease
[Symptoms] This disease occurs at all stages of development, and the previous stage of disease loss is heavy, which has a significant impact on production. Onset plants often exhibit mild mosaics, heavy mosaics, and malformations. In other words, the lightly infected plants exhibited pale leaf discoloration, chlorosis, unequal shades of color, sick leaf and heart leaf shrinkage, uneven size and other symptoms of light mosaic and malformation on only a few upper leaves. The disease was severe and the growth period continued to be high. The onset of the field showed that the whole plant turned green and yellow, only the main vein remained green, the diseased plant was dwarfed, the leaves became smaller, and finally the whole plant died of yellow.
[Pathogenesis] See broccoli virus disease for details.
[Control methods]
1, pay attention to the selection of heat-resistant and resistant, disease-resistant varieties, such as early Chinese mustard blue in Ganzhou.
2, increase the full maturity of the organic base fertilizer, high temperature and dry season, pay attention to ground water, strengthen the management of the onset, timely fertilizer, pay attention to the timely control of aphids, seriously ill strains should be removed as soon as possible.
3. If possible, use shade net or cold yarn covering cultivation techniques.
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