2014
DOI: 10.1590/s0100-83582014000100009
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Abstract: -This work was carried out with the objective of evaluating the growth and development of honey weed (Leonurus sibiricus) based on days or thermal units (growing degree days). Thus, two independent trials were developed to quantify the phenological development and total dry mass accumulation in increasing or decreasing photoperiod conditions. Considering only one growing season, honey weed phenological development was perfectly fit to day scale or growing degree days, but with no equivalence between seasons, w… Show more

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Cited by 5 publications
(7 citation statements)
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“…For other weed species, the Tb found was of: around 10°C for honeyweed (Leonurus sibiricus L.), by Silva et al (2014a); 12°C for southern sandbur (Cenchrus echinatus L.), by Machado et al (2014); 12ºC for purple nutsedge (Cyperus rotundus L.), by Lima et al (2015); and 10 or 15°C for sourgrass [Digitaria insularis (L.) Mez ex Ekman], by Marques et al (2014). In this context, in general, species with better adaptation to cold climate, with C3 photosynthetic cycle and smaller size, have Tb below 10°C.…”
Section: Resultsmentioning
confidence: 93%
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“…For other weed species, the Tb found was of: around 10°C for honeyweed (Leonurus sibiricus L.), by Silva et al (2014a); 12°C for southern sandbur (Cenchrus echinatus L.), by Machado et al (2014); 12ºC for purple nutsedge (Cyperus rotundus L.), by Lima et al (2015); and 10 or 15°C for sourgrass [Digitaria insularis (L.) Mez ex Ekman], by Marques et al (2014). In this context, in general, species with better adaptation to cold climate, with C3 photosynthetic cycle and smaller size, have Tb below 10°C.…”
Section: Resultsmentioning
confidence: 93%
“…Studies on the growth and development of weeds provide data on different phenological stages and growth patterns, enabling the analysis of the behavior of these plants compared with ecological factors over a growing season, as well as of their effects on the environment and especially on other plants (Marques et al, 2014;Silva et al, 2014a). The different levels of plant development have been evaluated using numerical scales.…”
Section: Introductionmentioning
confidence: 99%
“…This finding suggests similar plant development (phenology) at different times of the year when adjusted to days or degree-days scales. (Medeiros et al, 2000), corn (Gadioli et al, 2000), Leonurus sibiricus (Silva et al, 2014) and forage Panicum virgatum (Sanderson & Wolf, 1995). For southern sandbur (Cenchrus echinatus), Machado et al (2014) reported Tb = 12°C.…”
Section: Resultsmentioning
confidence: 99%
“…Traditionally, days have been used as a cycle timing, but it is a variable that is very much subject to environmental interferences which indirectly are also expressed on the phenology (Silva et al, 2014). Therefore, temperature has been considered the most important climatic element to predict physiological events, if there is no water deficit (Russelle et al, 1984;Gadioli et al, 2000).…”
Section: Resultsmentioning
confidence: 99%
“…In literature are considered values of Tb = 0 o C for weeds and temperate climate crops such as barley (Hordeum vulgare) and wheat (Triticum aestivum) (Cao & Moss, 1989;Kirkby, 1995). For sunflower (Helianthus annuus), Granier & Tardieu (1998) (Silva et al, 2014), for common beans (Phaseolus vulgaris) (Medeiros et al, 2000), for maize crop (Gadioli et al, 2000) and for bunch grass Panicum virgatum (Sanderson & Wolf, 1995). Machado et al (2014) (GDD); Tb = base temperature; * Significant by t test at 5% probability; ** Significant at 1%.…”
Section: Resultsmentioning
confidence: 99%