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2022 Volume 1 Issue 5
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GUO Moyan, SHI Caihua, LI Tong, et al. Analysis of Resistance of Ten Tobacco Varieties （Lines） to Tobacco Target Spot[J]. PLANT HEALTH AND MEDICINE, 2022, (5): 64-70. doi: 10.13718/j.cnki.zwyx.2022.05.007
Citation: GUO Moyan, SHI Caihua, LI Tong, et al. Analysis of Resistance of Ten Tobacco Varieties （Lines） to Tobacco Target Spot[J]. PLANT HEALTH AND MEDICINE, 2022, (5): 64-70. doi: 10.13718/j.cnki.zwyx.2022.05.007
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Analysis of Resistance of Ten Tobacco Varieties （Lines） to Tobacco Target Spot

  • 1. College of Agriculture, Yangtze University, Jingzhou Hubei 434025, China;

  • 2. Guizhou Academy of Tobacco Science, Guiyang 550081, China

More Information
  • Received Date: 13/09/2022

  • MSC: S572

  • To investigate the resistance of tobacco leaf at different maturity levels and different varieties(lines) to tobacco target spot disease, the resistance of ‘Yuyan 87' tobacco leaf at different maturity levels(immature, proper mature and mature) to target spot disease was conducted by surveying of disease index in the field, and the resistance of 10 tobacco varieties(lines)(‘Yunyan 87'‘Yunyan 85'‘Yunyan 97'‘Honghuadajinyuan'‘Guiyan 5'‘Guiyan 8'‘GZ36'‘K326'‘Jiucaipin 2' and ‘Bina 1') was analyzed by using the detached leaves. The results showed that the resistance of mature leaf to the target spot was the least with a disease index of 90.20, the proper ripe leaf had better resistance with a disease index of 66.67, and immature leaf showed the strongest resistance with a disease index of 25.00. Combining the results of indoor and field surveys, we found that ten tobacco varieties(lines) showed different resistance to tobacco target spot. ‘Jiucaiping 2' presented the highest resistance with a spot diameter of 12.38 mm at 10 days after inoculation(DAI), and the field disease index of 60.00 at 14 days DAI, followed by ‘Yunyan 97'‘Yunyan 85'‘Bina 1'‘Guiyan 8'‘Yunyan 87'‘Honghuadajinyuan' and ‘GZ36' with spot diameters 18.00~23.00 mm. ‘Guiyan 5' and ‘K326' had weak resistance with a spot diameter of 24.28 mm and 25.91 mm at 10 DAI and a field disease index of 68.44 and 62.67 at 14 DAI, respectively. Tobacco leaves at different maturity presented different resistance, and different cultivars exhibited different resistance against tobacco target spot. The outcome of this study could provide some reference for screening resistant tobacco sources for breeding.
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Analysis of Resistance of Ten Tobacco Varieties （Lines） to Tobacco Target Spot

  • Received Date: 13/09/2022

Abstract: To investigate the resistance of tobacco leaf at different maturity levels and different varieties(lines) to tobacco target spot disease, the resistance of ‘Yuyan 87' tobacco leaf at different maturity levels(immature, proper mature and mature) to target spot disease was conducted by surveying of disease index in the field, and the resistance of 10 tobacco varieties(lines)(‘Yunyan 87'‘Yunyan 85'‘Yunyan 97'‘Honghuadajinyuan'‘Guiyan 5'‘Guiyan 8'‘GZ36'‘K326'‘Jiucaipin 2' and ‘Bina 1') was analyzed by using the detached leaves. The results showed that the resistance of mature leaf to the target spot was the least with a disease index of 90.20, the proper ripe leaf had better resistance with a disease index of 66.67, and immature leaf showed the strongest resistance with a disease index of 25.00. Combining the results of indoor and field surveys, we found that ten tobacco varieties(lines) showed different resistance to tobacco target spot. ‘Jiucaiping 2' presented the highest resistance with a spot diameter of 12.38 mm at 10 days after inoculation(DAI), and the field disease index of 60.00 at 14 days DAI, followed by ‘Yunyan 97'‘Yunyan 85'‘Bina 1'‘Guiyan 8'‘Yunyan 87'‘Honghuadajinyuan' and ‘GZ36' with spot diameters 18.00~23.00 mm. ‘Guiyan 5' and ‘K326' had weak resistance with a spot diameter of 24.28 mm and 25.91 mm at 10 DAI and a field disease index of 68.44 and 62.67 at 14 DAI, respectively. Tobacco leaves at different maturity presented different resistance, and different cultivars exhibited different resistance against tobacco target spot. The outcome of this study could provide some reference for screening resistant tobacco sources for breeding.

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