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The Spectra Measurement and Analysis of Wheat Aphid Disaster in Beijing |
HE Guo-jin1, Hu De-yong1, JIN Xiao-hua2, YANG Jian-guo2, LI Guo-yang2 |
(1.China Remote Sensing Satellite Ground Station,Chinese Academy of Sciences,Beijing100086,China;
2.Plants Protecting Station of Beijing,Beijing100029,China) |
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Abstract Based on the measurement of chlorophyll content in the period of wheat growing and yielding and the relationship analysis between the content of chlorophyll and the amount of wheat aphid, this paper presented the basis of plant physiology for wheat aphid disaster monitoring using remote sensing technologies. The correlation curves addressing the relation between the amount of wheat aphid and the wheat spectra were figured out by ground spectral testing in 1995, 1996 and 1998, which verified the feasibility of wheat aphid disaster monitoring according to the ratio vegetation index of wheat spectral reflection, namely RVI. An approach of decision making for the time to wheat aphid preventing and curing was also offered, that is, what ' s the RVI when the aphid amount was about 500 in 100 trunks of wheat.It resulted in the key technology presentation for wheat aphid disaster monitoring, especially the technique for deciding the best time for wheat aphid preventing and curing.
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Received: 15 April 2002
Published: 21 November 2011
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