Planta Daninha (2009) 27, 683-687

N.P. Cardozo, M.C. Parreira, P.L.C.A. Alves and S. Bianco (2009)
Área foliar de duas trepadeiras infestantes de cana-de-açúcar utilizando dimensões lineares de folhas
[Foliar area estimate of two sugarcane-infesting weeds using leaf blade linear dimensions]
Planta Daninha 27 (4), 683-687
Abstract: The aim of this study was to obtain a mathematical equation to estimate the leaf area of Momordica charantia and Pyrostegia venusta using linear leaf blade measurements. Correlation studies were conducted involving real leaf area (Sf) and leaf length (C), maximum leaf width (L) and C x L. The linear and geometric equations involving parameter C provided good leaf area estimates. From a practical viewpoint, the simple linear equation of the regression model is suggested using the C x L parameter, i.e., considering the linear coefficient equal to zero. Thus, leaf area estimate of Momordica charantia can be obtained by using the equation Sf = 0.4963 x (C x L), and that of Pyrostegia venusta by using equation Sf = 0.6649 x (C x L).
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Database assignments for author(s): Pedro Luís C. A. Alves

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Momordica charantia (weed)
	Pyrostegia venusta (weed)