Vorträge und reden von Hermann von Helmholtz.

Bd. 2

Vorträge und reden von Hermann von Helmholtz.

Bd. 1

Os insetos como agentes polinizadores da mangueira

The authors study the insect population that visit the mango trees and search for their pollinizing activity. Prior operations showed that very few bees (Apis mellifera) visited the flowers of mango trees. It was known that the percentage of fecundation is low (Simão 1955), Popenoe (1929), Spencer and Kennard (1955), Lynch and Mustard (1955), Ruehle and Ledin (1955), so that the authors wented to Know if insects could be responsible for this. Insects were collected from mango trees, belonging to 10 orders, which, on the whole are not pollinizing agents. Bees were not collected, 21% were Hymenoptera, 20% were Diptera, 13% Hemiptera, 10% Coleoptera, 3% Blattariae and smoller percentages belonged to other orders.

Arsberattelser om Vetenskapernas Framsteg. Afgivne af Kongl. Vetenskaps-Academiens Embetsman.

1821

Annals of Philosophy.

n.s. v. 1 (1821)

Nova acta Regiae Societatis Scientiarum Upsaliensis.

ser. 2 v. 8 (1821)

Annales Academiae Rheno-Traiectinae.

1820-1821

Annales Academiae Rheno-Traiectinae.

1821-1822

Annales Academiae Lugduno-Batavae.

1820-1821

Annales Academiae Gandavensis.

1820-1821

Annales Academiae Gandavensis.

1821-1822