Canadian Journal of Botany - Revue Canadienne de Botanique (1991) 69, 442-446

B.K. Thompson, J. Weiner and S.I. Warwick (1991)
Size-dependent reproductive output in agricultural weeds
Canadian Journal of Botany - Revue Canadienne de Botanique 69 (3), 442-446
Abstract: Data on reproductive and vegetative weights of individuals from five species of agricultural weeds (Apera spica-venti L., Datura stramonium L., Abutilon theophrasti Medic., Sorghum halepense (L.) Pers., and Panicum miliaceum L.) were used to test Weiner's (1988) model of linear size-dependent reproductive output in plants. In general, the populations showed strong evidence (P < 0.001) of linear relationships between reproductive and vegetative weight. Linearity was most pronounced in cases where size differences were primarily due to competition. Generally, the linear relationships were consistent from population to population within a species. Many of the populations also showed positive x-intercepts, indicating a threshold size for reproduction. However, there were a number of populations with no apparent relationship between reproductive and vegetative weight, with departures from linearity, or with positive y-intercepts (negative x-intercepts).
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website

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.
	Apera spica-venti (weed)
	Sorghum halepense (weed)
	Datura stramonium (weed)
	Abutilon theophrasti (weed)
	Panicum miliaceum (weed)