摘要
1991年,笔者用五级目测草害调查法调查了兰州市蔬菜和果园杂草的发生与危害情况。兰州市园田杂草共28科108种。灰绿藜、藜、马齿苋、旱稗、苣荬菜为优势种杂草,它们的发生面积大,密度高,危害重。主要杂草有14种,也是化学防除的重点。
Distribution and damage of orchard and vegetable garden weeds in Lanzhou district were studied by the rating method with five scales during 1991. There are 108 weed species which belong to 28 families in orchards and vegetable gardens of Lanzhou. Chenopodium glaucum L. . Chenopodium album L. . Portulaca oleracea L. . Echinochloa crusgalli var, hispidula (Retz. ) Hack.. Sonchus brachyotus DC. . are dominant weed species. They grow over large areas, in high intensity, and cause great damages. The staple, dominant weeds are of 14 species. They are also main points for chemical control.
出处
《甘肃科学学报》
1992年第2期71-75,共5页
Journal of Gansu Sciences
基金
省自然科学基金资助项目
关键词
杂草
兰州市
果园
Weed , distribution, damage.
