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The leafcutting bee, Megachile rotundata (F.): a potential pollinator for red clover 1
Author(s) -
Fairey D. T.,
Lefkovitch L. P.,
Lieverse J. A. C.
Publication year - 1989
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1989.tb00227.x
Subject(s) - biology , pollinator , pollination , red clover , horticulture , botany , agronomy , pollen
The use of the leafcutting bee, Megachile rotundata (F.) as a pollinator of single‐cut, diploid red clover, Trifolium pratense L. was investigated in the Peace River region of northern Alberta over a 5‐year period, 1983 to 1987 inclusive. Average seed yield with the use of this pollinator was 410 kg/ha as compared to 291 kg/ha for the control where the leafcutting bee was not used. Furthermore, in four of the five years of study, provision of leafcutting bees was associated with higher seed production. Reproduction of leafcutting bees pollinating red clover was comparable to that obtained on alfalfa. For each crop, about 96 percent of the cells produced were viable. Also, about 32 percent of these cells were females, i.e., a 2:1 ratio of males to females. It should be noted however, that the ratio of cell increase was generally lower in bees pollinating red clover than in those pollinating alfalfa but that the lowest increase obtained was 1.5, i.e., there was no bee loss, only a minimum gain of 50 percent. The results of the present study indicate that management of the leafcutting bee as a pollinator of red clover merits further investigation. Zusammenfassung Die Blattschneiderbiene Megachile rotundata (F.): ein potentieller Bestäuber für Rotklee Die Verwendung von Megachile rotundata als Bestäuber des diploiden Rotklees, Trifolium pratense , wurde in der Peace River‐Region (N‐Alberta) 1983–1987 untersucht. Die mittlere Samenernte nach Einsatz dieser Blattschneiderbiene betrug 410 kg/ha gegenüber der Kontrolle (291 kg/ha). Die Reproduktion von Rotklee bestäubenden Blattschneiderbienen war jener der Alfalfa bestäubenden vergleichbar. Bei jeder der zwei Kulturpflanzen waren etwa 96% der Megachile –Brutzellen lebensfähig. Rund 32% der Zellen ergaben Weibchen, was einem Geschlechterverhältnis von 2:1 zugunsten der Männchen entspricht. Der Zuwachs an Zellen war allgemein bei den Rotkleebestäubern geringer als bei den Alfalfabestäubern, betrug jedoch zumindest 1,5. Das heißt, daß es keinen Verlust an Bienen gab, sondern mindestens einen Gewinn von 50%. Die Ergebnisse zeigen, daß die Frage eines Managements von Blattschneiderbienen als Rotkleebestäuber weitere Untersuchungen verdient.

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