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• Banana bunchy top virus (BBTV) is the most devastating virus disease of bananas. The virus is transmitted by the banana aphid (Pentalonia nigronervosa) in a persistent manner. New growth from infected plants is stunted and distorted, resulting in a characteristic "bunchy top" appearance. No fruit is produced on infected plants, and a high incidence of BBTV in production areas can cause complete yield loss. Specific objectives of this project are: (1) to develop rapid, sensitive, and reliable assays for detection of BBTV in plants and insects; (2) to characterize the genome organization and vector transmission of BBTV; and (3) to develop resistant transgenic banana plants to control BBTV.
• Mealybug wilt of pineapple (MWP) is a devastating disease found in all the pineapple-growing regions of the world. The disease is characterized by severe leaf tip dieback, downward curling of the leaf margins, and reddening and wilting of the leaves that can lead to total collapse of the plant. Specific objectives of this project include: (1) to develop rapid detection assays for the closterovirus; (2) to study the cause (etiology) of MWP; (3) to examine the epidemiology of the virus; and (4) to develop alternative, environmentally sound strategies to manage MWP.

Selected Recent Publications :

• Green, J.C., Borth, W.B., Melzer, M.J., Wang, Y.N., Hamim, I.,and Hu, J.S. 2017. First Report    of Bean common mosaic virus infecting Phaseolus lunatus in Hawaii. Plant Disease 101:1557. 

• Hamim, I., J. C. Green, W. B. Borth, M. J. Melzer, Y. N. Wang, and J. S. Hu. 2017. First Report of Banana bunchy top virus in Heliconia spp. on Hawaii. 2017, Volume 101: 2153

   

  Li, Y., Wang, Y., Hu, J., Xiao, L., Tan, G., Lan, P., Liu, Y., and Li, F. 2017. Molecular and biological characteristics of Tomato mottle mosaic virus Chinese isolate. Virology Journal  14:15-23.

• Li Q, Xu Y, Zhu M, Dong Y, Hu J, Li Y, Liu Y. 2017. Genetic diversity of the nucleocapsid protein gene of hippeastrum chlorotic ringspot virus from Hymenocallis littoralis in southern China. Acta Virol. 61(1):116-122.

   

  Wang, Y. N., Wu, B.L., Borth, W. B., Hamim, I., Green, J.I., Melzer, M.J., and Hu, J.S. Molecular Characterization and Distribution of Two Strains of Dasheen mosaic virus on Taro in Hawaii. Plant Disease 101:1980-1989.

  Wang, Y. N., Borth, W. B., Hamim, I., Green, J.I., Melzer, M.J., and Hu, J.S. 2017. First Report of Taro bacilliform CH Virus (TaBCHV) on Taro (Colocasia esculenta) in Hawaii.  Plant Disease 101:1334.

• Wang, Y.N., Melzer, M., Borth, W., Green, J. Hamim, I.,  and Hu, J.S. 2017. First report of Bean yellow mosaic virus in vanilla in Hawaii. Plant Disease 101:1557.

• Wang, Y. N., Borth, W. B., Hamim, I., Green, J.I., Keqiang Cao, J.S. Hu, and Melzer, M.J. 2017. Genome characterization and distribution of Taro bacilliform CH virus on taro in Hawaii, USA Eur J Plant Pathol https://doi.org/10.1007/s10658-017-1353-z

• Xu, Y., Xue Gao, Zhiqiang Jia, and Wengui Li, John Hu, Yajin Li, Yongzhong Li, and Yating Liu. 2017. Identification of Taeniothrips eucharii (Thysanoptera: Thripidae) as a Vector of Hippeastrum chlorotic ringspot virus in Southern China. Plant Disease 101:1597-1600.

   

  Zhang, J., Jingxin Zhang, Kishore K. Dey, Birun Lin, Wayne B. Borth, Michael J. Melzer, Diane Sether, Yanan Wang, I-Chin Wang, Huifang Shen, Xiaoming Pu, Dayuan Sun, and 2017. Characterization of Canna yellow mottle virus in a new host, Alpinia purpurata, in Hawaii. Phytopathology 107:791-799.

   

  Zhang, J., Borth, W.B., Sether, D., Wang, I., Lin, B, Melzer, M.J., Shen, H., Pu, X, Nelson, S., Hu, J.S. 2016. Deep Sequencing of Banana Bract Mosaic Virus from Flowering Ginger (Alpinia purpurata) and Development of an Immunocapture RT-LAMP Detection Assay. Arch. Virol 161(7):1783-1795.

• Zhang, J., Borth, W.B., Sether, D., Wang, I., Lin, B, Melzer, M.J., Shen, H., Pu, X, Nelson, S., Hu, J.S. 2016. Deep Sequencing of Banana Bract Mosaic Virus from Flowering Ginger (Alpinia purpurata) and Development of an Immunocapture RT-LAMP Detection Assay. Arch. Virol 161(7):1783-1795.

  Xu, Y., ·Wang, S., Li, Y.,  Tao, H., Huang, Y.,  Wu, B.,  Dong, Y.,  Hu, J., Liu, Y. 2016. Complete genome sequence of a distinct Calla lily chlorotic spot virus isolated from Mainland China. Arch. Virol. 161:219-222.

• Watanabe, S., Ruschel, R., Marrero, G., Sether, D., Borth, W., Hu, J., and Melzer, M. 2016. A distinct lineage of Watermelon mosaic virus naturally infects honohono orchid (Dendrobium anosmum) and passionfruit (Passiflora edulis) in Hawaii. New Disease Reports 34:13.

  Green, James, Wayne Borth, John S. Hu (2016) Engineering Resistance to Viruses. In: Mohandas S, Ravishankar KV (eds) Banana: genomics and transgenic approaches for genetic improvement. Springer, Singapore, pp 237-246.

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