Occurrence and management of basal stalk rot of water bamboo in Taiwan
Start Page
167
End Page
179
ISBN
978-986-058-353-3
Date Issued
2018-12
Date
2018-12
Author(s)
Huang, Jin-Hsing
Abstract
In 1999 a severe basal stalk rot disease of water bamboo (Zizaniae latifolia) occurred in Nanto County in the summer, and as of today Nanto is still the only county manifested with the disease. The causal agent of the disease was considered to be Pythiogeton zizaniae. The local varieties ‘Green Shell Early’ and ‘Red Shell’ were both susceptible, with the former being more susceptible. For the variety ‘Green Shell Early’, the edible swelling culms (water bamboo shoots) could be harvested in April–June and July–October, designated as the first and the second harvest period, respectively. The disease appeared from late April to October, but in July the disease severity scaled up to 43.8% in the individual field. The disease could cause severe yield loss of the second harvest period. For the isolation of this pathogen, the more distant from the cutting wounds the less frequent the pathogen could be isolated. By draining the field for 30 days near the end of first harvest period (around May and June), the disease severity could be reduced. Although the yield of the first harvest period was mildly decreased, that of the second harvest period was greatly increased, amounting to higher yield than the conventional farming. Planting water bamboo one month in advance and in combination with lighting at night could accelerate the harvest time, and accordingly draining was advised to be conducted earlier to reduce the disease severity and prevent the yield loss due to the drainage. Furthermore, the method treated with drainage and cut-off all the above ground plants post the first season would assist new tillers growth and significantly reduce basal stalk rot disease. The disease severity after treatment using the above-mentioned method was down to 1.4%, which was significantly lower than that of merely drainage treatment or non-drainage.
Event(s)
2018 強化作物關鍵有害生物整合管理之前瞻技術國際研討會
Proceedings of the 2018 International Symposium on Proactive Technologies for Enhancement of Integrated Pest Management of Key Crops
Subjects
Zizaniae latifolia
Pythiogetonbasal stalk rot
drainage
harvest period regulation
Publisher
農業試驗所
Type
book part
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