00228563

open access

Version of Record

ウメ ムカフン ヒンシュ ノ ケツジツ ヨウイン ニ カンスル ケンキュウ 3 ホウカ コンチュウ ノ ヒライ ト ケツジツ ニツイテ エンゲイ ノウガク

The Factors Affecting Fruit Set in Pollen-Less Variety of Japanese Apricot (III) : The Frequencies of Insects Visiting Flowers and Fruit Set

Japanese (日本語)

神戸大学農学部研究報告

13(1)

75-80

神戸大学農学部

1978

2006-09-15

本文ファイルは、国立情報学研究所CiNiiより提供されたものです。

The commercial varieties in Japanese apricot consist of pollen-less and self-incompatible varieties. Therefore, cross pollination is essential to fruit set, which is accomplished mainly by bees. The frequencies with which bees visit the flowers of the pollen-less and pollen-bearing varieties were observed in the low and high yielding orchards. Many honey bees visited to the flowers of the high yielding orchard (W) as compared with the low yielding orchards (K and I). Honey bees visited less frequently the flowers of the pollen-less varieties (Gyokuei in K and I, and Gyokuei and Gojiro in W) than those of the pollen-bearing ones. The number of bees visiting the flowers was related to the percent of pollinated flowers with the pollen-less varieties and to the amounts of pollen on the stigma with the pollen-bearing varieties. Honey bees and horseflies (Eristalis carealis FABRICIUS) were compared for the pollination. About 1200 horseflies were released in each three orchards and 7 or 10 colonies of honey bees were kept in two orchards. Honey bees brought large quantities of pollen on the stigma with two orchards and horseflies with one orchard. Horseflies also worked in the breeding box effectively to transfer the pollen from a pollinizing variety, Rinshu to the pollen-less variety Gyokuei.

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