Vietnam Academy of Science and Technology

Project's information

Project's title	Impact of agricultural cultivation and environmental change on plant nematode communities in crop restructuring in Lam Dong
Project’s code	VAST04.04/21-22
Research hosting institution	Institute of Ecology and Biological Resources
Project leader’s name	Trinh Quang Phap
Project duration	01/01/2021 - 31/12/2022
Project’s budget	600 million VND
Classify	Grade A
Goal and objectives of the project	- Determination of plant parasitic nematode species composition at survey sites in Lam Dong - Constructing a model of ecological transition of parasitic nematodes on crops in Lam Dong.
Main results	- Theoretical results: The total number of species recorded in Lam Dong so far is 107 species. There were recorded 38 species in this study and 23 species among them were first recorded for Lam Dong. One hundred slides of 38 species were completed and seven sequences of DNA (D2D3, ITS and 18S) of 4 species of plant nematodes were registered in GenBank. The important group of plant parasitic nematodes that have the potential to cause damage to crops, especially coffee and vegetable crops, are the root-knot nematodes and the migrating endoparasitic nematodes. Soil physico-chemical affecting nematodes such as pH, OM index and soil density were the strongest correlations with the density of groups of root-knot nematodes and migrating endoparasitic nematodes in the soil. The composition of plant parasitic nematodes was no significant difference between the 3 districts of Don Duong, Di Linh and Duc Trong. The vegetable host is the most susceptible to root-knot nematodes and migrating endoparasitic nematodes. - Applied results: The results are important data for the region orientating in the development of crops and agro-economic zones. That can be applied in the direction of science and technology deployment. Identifying plant parasitic nematodes species that are potentially cause damage to crops in the integrated control of plant parasitic nematodes and predicting outbreaks of each species for new cultivated crops. Besides, soil factors such as pH, organic content and soil density are also concerned in the cultivation process and pest management and minimizing chemical pesticide in agriculture.
Novelty and actuality and scientific meaningfulness of the results	New recorded 03 species of plant parasitic nematodes in Vietnam and 01 species of entomopathogenic nematode that is capable of being used in integrated agricultural pest management. There has been analysis and prediction of plant parasitic nematode groups at risk of outbreaks in Lam Dong. This is an important point to help managers make decisions about the orientation of crop production areas in the coming time.
Products of the project	- Scientific papers in referred journals (list): SCI-E Journals 1) Trinh, P. Q., Nguyen, D. T., Le, L. T. M., & Nguyen, T. H. (2021). First report of entomopathogenic nematode Steinernema surkhetense and its pathogenic potential to larvae of the Greater Wax Moth (Galleria mellonella L.) in Vietnam. Egyptian Journal of Biological Pest Control, 31(1), 1-7. DOI: 10.1186/s41938-021-00496-1 (Q2) 2) Nguyen, T. D., & Trinh, Q. P. (2021). First report of an important sheath nematode, associated with sugar beet (L.) in Vietnam. Helminthologia, 58(3), 333-338. (Q3) 3) Le, T. M. L., & Trinh, Q. P. (2021). Integrative taxonomy of Mesocriconema onoense (Tylenchida: Criconematidae) from Vietnam highly suggests the synonymization of Mesocriconema brevistylus and related species. Infection, Genetics and Evolution, 95, 105090. (Q1) VAST2 journal 1) Trinh QP, Nguyen TD, Le TML, Nguyen HT, 2022. Morphological and molecular characterisations of Scutellonema brachyurum (Steiner, 1938) Andrassy, 1958 from the western highlands, Vietnam. Academia Journal of Biology, 44(3): 149–160.
Research area	The results of the project are important data for Lam Dong Department of Agriculture and Rural Development in making forecasts and planning the province's crop areas.
Recommendations	The project only represents 3 districts in 12 district-level units of Lam Dong in the restructuring of crops from forest - industrial plants - vegetables. Other crop transliterated models are still continuing currently in some districts, some other districts are having outbreaks of plant parasitic nematode diseases on many crops such as mulberry trees, medicinal plants ... need to continue to be implemented out of 13 crops have been studied for agricultural development in Lam Dong and Central Highlands in general. Due to the limited time, the collected species are still at the genus level that have not yet been identified taxonomically need to be further elucidated.
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