翻訳と辞書
Words near each other
・ Delicious!
・ Delia Larkin
・ Delia Lawrie
・ Delia Magaña
・ Delia Matache
・ Delia Matte Pérez
・ Delia Memorial School (Matteo Ricci)
・ Delia Memorial School (Yuet Wah)
・ Delia Meulenkamp
・ Delia Murphy
・ Delia Opekokew
・ Delia Parodi
・ Delia Parr
・ Delia Pemberton
・ Delia Pinchetti de Sierra Morales
Delia radicum
・ Delia Razon
・ Delia Reinhardt
・ Delia Ryan
・ Delia Scala
・ Delia School of Canada, Hong Kong
・ Delia Sescioreanu
・ Delia Sheppard
・ Delia Sherman
・ Delia Smith
・ Delia Smith's Cookery Course
・ Delia Steinberg Guzmán
・ Delia Tetreault
・ Delia Vallejos
・ Delia Vaudan


Dictionary Lists
翻訳と辞書 辞書検索 [ 開発暫定版 ]
スポンサード リンク

Delia radicum : ウィキペディア英語版
Delia radicum

''Delia radicum'', known variously as the cabbage fly, cabbage root fly, root fly or turnip fly, is a pest of crops. The larvae of the cabbage root fly are sometimes known as the cabbage maggot or root maggot. The adult flies are approximately 1 cm long and are grey in colour but otherwise resemble the common house fly.〔(【引用サイトリンク】title=Cabbage root fly )
The flies can be found all over Europe. After over-wintering as pupae in the soil, the flies hatch in spring, feed on nectar and lay eggs close to plants of the genus ''Brassica''. The eggs are white and about 1 millimetre in diameter. They hatch into white maggots after about six days and the larvae feed for about three weeks on the roots and stems of the cabbage plants. After this, the larvae are typically 0.9 to 1 cm in length and form reddish brown pupae which hatch into adult flies after around 20 days. This species is monovoltine (has one generation a year) in northern Europe and bi- or trivoltine in central Europe.〔(【引用サイトリンク】title=''Delia radicum'' (L.) - Root Fly, Spring Cabbage Fly, Radish Maggot )
==Economic significance==
The first sign of the presence of the larvae is a delay in plant growth accompanied by the withering of leaves which develop a bluish tinge. The larvae are found on cabbage, turnip, swede, radish and other cruciferous crops. Sometimes 300 larvae can be found on one plant, damaging the inner parts of the main root and disrupting the transport of water and nutrients to the stem and leaves causing the death of many plants.〔

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 radicum」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.