| 翻訳と辞書 |
| Delia floralis ： ウィキペディア英語版 |
Delia floralis
''Delia floralis'', commonly known as the turnip root fly or summer cabbage fly, is a cosmopolitan pest of crops. The larvae or maggots feed on the roots of various plants in the Brassicaceae family.
==Morphology and biology==
This species resembles the closely related cabbage root fly in appearance though it is slightly larger at seven to eight millimetres long. The body is light gray and the yellowish wings are transparent with yellow veins. Over most of its range, there is only one generation of this fly each year. The eggs are laid seven to ten days after the adult has emerged from the pupa. They are white and cigar-shaped and are laid in groups of thirty or forty eggs at the root collar of the host plant or on the ground nearby. Often several females lay eggs on one plant. The glossy white or yellow larvae hatch in five to fourteen days. They feed for about forty days, moulting three times, eating the young roots or tunneling into the main root of the host plant〔(AgroAtlas )〕 or even penetrating into the basal part of the leaves of hearting cabbage. The pupae are brown and about six millimetres in length. The insect overwinters as a pupa in the ground at a depth of five centimetres or more.〔(HYPP Zoology )〕 The pupae can endure frosts of -33°C and in the following year the adults emerge at varying dates, doing so when the soil temperature reaches 18°C at the depth of the pupae.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Delia floralis」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|