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Observações sobre a polinização entomófila de Helianthus annuus L. em Viamão, Rio Grande do Sul

1994; SciELO; Volume: 23; Issue: 3 Linguagem: Inglês

10.37486/0301-8059.v23i3.959

ISSN

1981-5328

Autores

Magali Hoffmann,

Tópico(s)

Growth and nutrition in plants

Resumo

Observation on the Entomopliilous Poilination of Ifehanthus annuus L. in Viamão, RioGrande do Sul StateStudies conducted in Viamão, Rio Grande do Sul State, with one cultivar of oil-seed sunflower iJe,'ianthus annuus L., indicated that unbagged heads had significantly more developed seeds than bagged heads.The productivity obtained in unbagged heads was 52% higher that in bagged heads.Twenty three species ofbees were observed and their activity was highest when 90% ofthe heads were open.The peak of abundance was between nine and 10 AM.About 96% of total insects observed ou sunflowers heads were honey bees, Apis rne!hfèra L.

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