摘要
贵州省西部地区稻田发生的杂草有27科61种,其中以稗草、鸭舌草、眼子菜为优势种,其次是慈菇和牛毛毡。禾本科杂草、阔叶杂草、莎草科杂草的发生分别在插秧后7～15天、15～20天、20～30天达到高峰。5.3％丁西颗粒剂对稻田杂草的群体防效在70％以上,其亩用药量为74克(ai)。
There are 61 species of major weeds beloring to 27 families in paddy fields in west area of Guizhou. The most important species (superior species) are Barnyardgrass (Echinochloa crusgalli), Ducktongue weed (Monochoria vaginalis), Bog pondweed (Potameogeton disiinctus), ect. More important weeds are Oldworld arrowhead (Sagiltaria sagittifolia) and needle spikesedge (Eleoch-aris yokoscensis). The peaka of grasses, broad-leaf weeds and sedge occurence are during 7-15 days, 15-20 days, 20-30 days respectively after transplanting of rice. The efficiency could be over 70% in controlling all kinds of weeds with 5.3% Butachor-sime-tryme DF at 74 gaimu.
出处
《贵州农业科学》
CAS
1991年第6期19-23,共5页
Guizhou Agricultural Sciences
关键词
稻田
杂草
发生
防除
药剂
kind of weeds
regularity of occurence
efficiency
