USING SPECTROSCOPIC DATA SETS TO PREDICT NUMBERS OF THRIPS (FULMEKIOLA SERRATA) IN SUGARCANE

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Date
2009
Authors
Abdel-Rahman, Elfatih
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Publisher
uofk
Abstract
Sugarcane thrips, Fulmekiola serrata (Kobus) (Thysanoptera: Thripidae), has recently been perceived as a constraint to southern African sugarcane production. Spectroscopic readings at leaf level in sugarcane variety N19 were recorded with the aim of predicting numbers of thrips (nymphs, adults and nymphs+adults) using partial least squares (PLS) regression. Correlations were high, viz. R2=0.75 for predicting nymphs numbers, 0.72 for adults and 0.75 for nymphs+adults. Predictions were reliable for nymphs since root mean square error (RMSE) of prediction was 1.25 (47%). Higher RMSE values were obtained for adults (4.8; 66%) and combined life stages (6.2; 63%).
Description
This paper had been presented for promotion at the university of Khartoum. To get the full text please contact the author elfatihabdelrahman@gmail.com
Keywords
sugarcane, thrips, Fulmekiola serrata, spectroscopy, partial least squares regression
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