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grey system

International Journal of Tropical Insect Science (1)

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1 results

A study on the occurrence tendency of Tryporyza incertulas by grey Prediction
Ye Zheng-Xiang, Li Ri-Zhi
Journal:

Insect Science and Its Application / Volume 12 / Issue 1-2-3 / June 1991

Published online by Cambridge University Press:

19 September 2011, pp. 263-267

Print publication:

June 1991
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By means of the GM (1, 1) modelling of grey system theory, the authors built the predicting models of Tryporyza incertulas (Walk) occurrence tendency with a computer, based on the insect pests occurrence data accumulated for 26 years from Feng Cheng county:
model I x(t + 1) = 71.2131e0.1136t - 68.2131
model II x(t + 1) = 58.2206e0.1254t - 55.2206
Tests indicated that the two models are valid, and if we use the models to predict the damage by Tryporyza incertulas in the year in which the damage by Tryporyza incertulas is serious, the results would contribute to the control of borers in the area in practice.