摘要
通过调查麦红吸浆虫幼虫在小麦穗上的分布和危害特点 ,进一步明确 :麦穗上麦红吸浆虫幼虫聚集分布的田间分布格局与虫口密度无关 ;麦红吸浆虫在麦穗上的分布和危害与麦穗大小和受害部位有一定的关系。就麦穗大小而言 ,以中型穗上虫量最多 ,受害最重 ;大型穗次之 ;小型穗上虫量最少 ,受害最轻。就麦穗受害部位而言 ,以中部虫量最多 ,受害最重 ;下部次之 ;上部虫量最少 ,受害最轻。
This paper deals with the distribution and damaging characteristics of wheat blossom midge, Sitodiplosis mosellana (Gēhin),on wheat heads.It is further cleared that the distribution pattern of larva is not in relation to the larva density on what heads.The distribution and infestation of larval wheat midge is affected by head size and infested location to a certain extent.There are most numerous larvae and most serious infestation on middle size head,next to big size and the least on small size according to the headsize.Or there are most numerous larvae and most serious infestation in the middle part,next to the bottom part and the least in the top part according to the infested location.On the basis of the above notes,it is suggested that a rational proportion of big middle and small size heads should be sampled and a whole head should be investigated.
出处
《西北农业大学学报》
CSCD
北大核心
2000年第4期40-44,共5页
Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)
基金
国家自然科学基金资助项目 !( 3 9770 4 99)
关键词
麦红吸浆虫
麦穗
分布特点
危害特点
小麦害虫
wheat blossom midge ( Sitodiplosis mosellana )
wheat
distribution characteristic
infestation characteristic
