MOVEMENTS OF ORIENTAL FRUIT FLIES IN THE FIELD

東方果實蠅在田間之移動現象

邱煇宗(Huei-Tzong Chiu)

《中華昆蟲》 3卷2期 (1983/09) Pp. ii+93-102

https://doi.org/10.6660/TESFE.1983005

摘要

The movements of Dacus dorsalis depended on the flora of various plants especially the host plants including their blossom and fruit stage. The dispersive distance of this fiy was different between the host plant and non-host plant areas. The distance of dispersal in the pineapple orchard was more than 2Km, its mean value being 0.94Km; the distance of dispersal in the host plant areas is more than 0.60Km with an average of 0.33Km. From recapture by methyl eugenol trap in the field, the sterile flies could survive up to 9 weeks, and the mean survival duration was 5 weeks in the field. After the marked flies were released in the field, the dispersive distance increased gradually; but sometimes the flies stay around in a certain area for feeding, oviposition and shelter. Bamboo fields are the most favored areas for the fiy's resting. There might be more shelters in the bamboo field than other orchards.

並列摘要

東方果實蠅之移動受田間之作物相及生育期影響很大，尤以開花及果實成熟期為甚，在寄主及非寄主果園之移動現象差異很大；在鳳梨園（非寄主）其飛行距離超過2公里以上，平均為0.94公里，在蓮霧園（寄主）其飛行距離最遠僅0.60公里，平均為0.33公里。另試驗中釋放之不孕性成蟲在田間平均存活五週之久，更長者可存活9週。成蟲在田間之移動距離有時很明顯地可看出越飛越遠，但有時却數週仍停留在原處或某一點徘徊，發生徘徊之場所，多為較隱密且通風不良之樹叢，尤以寄主果園及濃密之竹園，可提供其取食，產卵及停息之場所，發生之蟲數最高。