Acta Entomologica Sinica (2000) 43, 176-183

Yun Xuan Bao, Ji Yi Cheng, Xia Nian Cheng, Chang Shu Chu and Tong Li Shen (2000)
[Dynamical and numerical simulations on the processes of Nilaparvata lugens long-distance migration northward during the midsummer in China]
Acta Entomologica Sinica 43 (2), 176-183
Abstract: Based on the two migration events of Nilaparvata lugens (Stal) population, which had led to its serious infestation on rice in Changjiang valley, the main rice-growing regions in midsummer of 1991, and introduced into certain physiological and ecological parameters controlling the migration, a dynamical and numerical prediction model with higher spatio-temporal detectablity MM4 and a means of calculating for 3-D trajectory were used to model the dynamic state of their migrating northward. The simulations and the comparisons between the simulations and the practical pests investigation showed: (1) The emigrating resource was an area from 22.5°N to 27°N on latitude and from 110°E to 116°E on longitude. (2) There were three spatial migratory paths, which consisted of a main path with an azimuth of about 32° and two assistant paths of about 10° and 75° respectively on azimuth. (3) There were three immigrating and descending regions with a main region situated in the middle and lower reaches of Changjiang valley, an assistant region joined northwestern Hubei with northeastern Sichuan and another assistant region enclosed southeastern Zhejiang and northern Fujian. (4) The conformity between the simulations and the practical pests investigation just illustrated that this model is an important means for the exploration of migratory pests' catastrophic mechanism.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Nilaparvata lugens	Rice (Oryza)	China (south)