National Plant Protection Centre

Department of Agriculture, Ministry of Agriculture & Forests

Nppc-Header-Dzongkha

National Plant Protection Centre

Department of Agriculture, Ministry of Agriculture & Forests

Seminar: Citrus HLB – update and future strategies

Dr. Namgay Om, the Head of the Plant Pathology Program at the National Plant Protection Centre (NPPC), Semtokha, presented a seminar on ‘Citrus HLB – update and future strategies’ on 21 November 2022 at the NPPC conference hall. The seminar was attended by the plant protection officers, the Programme Director, Weed Specialist, and the IPM Specialist of the Centre. The seminar highlighted the impacts of huanglongbing (HLB) worldwide and its status in Bhutan.  Highlights of results of studies in the early 1900s in India and China to the latest development of achieving bio-film culture of the pathogen were shared during the seminar.  Findings of studies conducted in Bhutan to determine transmission of the HLB pathogen ‘Canditatus Liberibacter asiaticus’ by the black psyllid, Diaphorina communis and effects of altitude, ambient temperature and relative humidity on the distribution of HLB and psyllids were also presented to update the new recruits. Though there are many studies and information available on HLB management, according to Dr. Namgay Om, the strategy for Bhutan is to emphasize on integrated pest management approach. Such approach would mean combining the use of clean planting material, which is already underway, choosing suitable altitude range to avoid the psyllid vector, and nutrient improvement in addition to looking at the possibilities of high-density planting and grafted seedlings (disease free).   In conclusion, Dr. Namgay Om reminded the participants about the importance of not only the biology of the pest/pathogen in devising a management strategy but the effectiveness, practicality, accessibility, cost/ benefit and acceptability of a management practice.

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Program Director

Program Director

Mrs. Yeshey Dema

Mrs. Yeshey Dema joined the civil service on 26th February 1996. She headed the Soil Fertility Unit, NSSC from 2008 till 2013. In 2013, she was transferred to the National Plant Protection Centre as the Program Director. She holds M. Phil in Soil Science from the University of Reading, UK.

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