Problematic migration to cultivated field of cabbage looper Trichoplusia ni as a pest ; Their ecological aspects and how they control.

卷心菜尺蠖作为害虫向耕地迁移的问题；

基本信息

批准号：
15580038
负责人：
NOMURA Masashi
金额：
$ 1.92万
依托单位：
Chiba University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15580038/
关键词：
Trichoplusia ni Autographa nigrisigna cabbage field cold resistance of larva change of dominant species Copidosoma floridamum parasite rate 優占種交代寄生蜂アンケート調査圃場調査農薬感受性試験ミトコンドリアDNA 塩基配列

项目摘要

The cabbage looper Trichoplusia ni (Lepidoptera, Noctuidae) is notorious crop pest in the USA for long time. However, there was no report about T.ni as a crop pest in Japan.But there were many larvae of T.ni in cabbage field of west parts of Japan (Kagoshima and Hyogo prefectures) in 2000.Distribution of Japanese cabbage looper is spreading from south-western to north-eastern parts of Japan. For example, there was no larvae in Chiba prefecture, and first appearance of T.ni was confirmed by this project in 2003.Annual occurrence of T.ni in cabbage field was monitored by adults captured by pheromone trap and larvae by field collecting. The number of larvae of T.ni is increasing from spring to fall. The dominant species of cabbage fields in Hyogo prefecture is Autographa nigrisigna in spring, then changing to Trichoplusia ni in fall. But cold resistance of larva of A.nigrisigna is stronger than T.ni. So, the dominant species of cabbage field changing to A.nigrisigna in spring again.Origin of Japanese T.ni could not clarify in this project. But parasitism rate of Copidosoma floridamum on Japanese T.ni is lower than T.ni of the USA. These data suggested that Japanese cabbage looper is quite different from American strain.

卷心菜looper trichoplusia ni（Lepidoptera，noctuidae）在美国长期以来是臭名昭著的作物害虫。但是，在日本没有关于T.Ni作为农作物害虫的报道。但是2000年，日本西部的白菜田（Kagoshima和Hyogo县）有许多T.Ni幼虫。例如，在千叶县没有幼虫，该项目在2003年证实了T.NI的首次出现。从春季到秋季，T.NI的幼虫数量增加。春季的卷心菜田中的主要物种是春季的Autographa nigrisigna，然后在秋季更改为trichoplusia ni。但是A.nigrisigna的幼虫的冷耐药性比T.Ni强。因此，卷心菜田中的主要物种再次在春季转变为a.nigrisigna。但是，日本T.NI上copidosoma floridamum的寄生率低于美国的T.NI。这些数据表明日本白菜循环与美国菌株完全不同。