2011
DOI: 10.1590/s0103-90162011000600007
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Abstract: Sunflower (Helianthus annuus L.) is an allogamic plant, which needs insects on flowering, especially the honeybees for seed production. Collecting nectar and pollen by honeybees in agricultural crops is essential to apiculture, as well as a better understanding of plant biology. The foraging behavior of Africanized Apis mellifera L. (Hymenoptera, Apidae) and its efficiency of pollination on seed yield of sunflower genotypes (open pollination and restricted pollination) were evaluated. There were peaks of visit… Show more

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Cited by 38 publications
(25 citation statements)
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“…Numerous studies have reported the increases in grain yield from the cross-pollination by pollinating insects, especially A. mellifera [3,25,26]. Chammer et al [27] reported the importance of pollinators for the sunflower crop and suggest that some grain yield components may be sensitive to the quantity and quality deposited by pollinating pollen stigma in the plant.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Numerous studies have reported the increases in grain yield from the cross-pollination by pollinating insects, especially A. mellifera [3,25,26]. Chammer et al [27] reported the importance of pollinators for the sunflower crop and suggest that some grain yield components may be sensitive to the quantity and quality deposited by pollinating pollen stigma in the plant.…”
Section: Discussionmentioning
confidence: 99%
“…In sunflower crop, a 43% increase in grain yield can be achieved with cross-pollination by introducing colonies of insect pollinators, mainly by Africanized honeybees [3]. Nevertheless, in Brazil, this is an uncommon practice, which limits increased production [4].…”
Section: Introductionmentioning
confidence: 99%
“…Although modern sunflowers have been bred for increased self-fertility, selfing rates still vary across genotypes, resulting in differing pollinator dependence. However, recent studies on oilseeds found that seed set, oil content, and overall yields increased when flowers were exposed to animal pollinators (de Paiva et al, 2003;Degrandi-Hoffman and Chambers, 2006;Nderitu et al, 2008;Tesfay, 2010;Chambó et al, 2011). The goal of this study was to evaluate the benefits of insect pollination to different modern confection sunflower varieties.…”
Section: Benefits Of Insect Pollination To Confection Sunflowers Diffmentioning
confidence: 97%
“…Assays carried out in Marechal Cândido Rondon, Paraná, Brazil, with sunflower make clear worker honeybees that hoarding nectar are more frequent (mean 2.28 honeybees/capitulum) than pollen foragers (0.40 honeybees by capitulum) in anthesis period and schedule of higher visitation in the crop (Chambó et al, 2011). Other experimental results make clear more frequency of nectar foragers than pollen foragers in sunflower crop (Paiva et al, 2002;Teixeira & Zampieron, 2008).…”
Section: Pollination and Plant Reproductionmentioning
confidence: 97%