摘要
鸭跖草为一年生晚春杂草,从5 月中旬开始出土,出土时间为70 d ,到6 月中旬进入开花盛期,9 月份大部分种子成熟并脱落。研究结果表明,鸭跖草种子一般分布在0 ~5、6 ~10、11 ~15 、16~20 和21~25 cm 土层中,平均为9~18 粒/ 。最适的出土深度为2 ~6 cm ,最适的发芽温度为10 ~15℃。用左丹2-0 ~2-5 kg/h ,在玉米4 叶期茎叶处理,防效可达74-2 % ~90-1 % ,而且经济效益显著。
The Commelina communis L is one kind of annual weed The seedlings emerge from middle of May.The emergence period of seedling are last to days.The flowers bloom in middle of June and mature seed fall off during september.The most seeds are distributed in 0~25 cm soil,9~18 grains per squaremeter.The optimum depth of soil and temper of seed emtrgence are 2~6 cm and 10~15℃ respectively The herbicide tests shown that 74 2%~90%of Commelina communis L plants can be controlled by spraying of 2.0~2.5 kg/hm 2 zuodan water at 4-leaf stage.
出处
《吉林农业科学》
CSCD
1999年第4期24-27,共4页
Journal of Jilin Agricultural Sciences
关键词
鸭跖草
生物学特性
化学防除
玉米田
Commelina Communis L
Biological characteristics
Chemical control