摘要
五爪金龙Ipomoeacairica和圆叶牵牛Pharbitispurpurea是华南地区重要的草质藤本杂草。 6 5× 10 - 6以上浓度的 2甲 4氯和 36 0× 10 - 6以上的 2 ,4 -D丁酯完全能使圆叶牵牛种子不能萌发 ,幼苗致死。叶片喷洒 6 50× 10 - 6以上浓度的 2甲 4氯及 36 0 0× 10 - 6以上浓度的 2 ,4 -D丁酯能杀灭五爪金龙和圆叶牵牛成熟植株。分别在茎干基部注射 1ml的 2 ,4 -D丁酯、“恶草灵”和“毒莠定”能较彻底地灭除五爪金龙。
Pharbitis purpurea and Ipomoea cairica are worst weeds of herbaceous vine in South China. Seeds of P.purpurea were treated by germinating application of 2 methyl 4 chlorine and 2,4 D, the results showed that at concentrations of 65×10 -6 and 650×10 -6 2 methyl 4 chlorine reduced germination to 64% and 97 7% respectively, at concentrations of 36×10 -6 and 360×10 -6 2,4 D reduced germination to 62 6% and 84 7% respectively. Seedlings of P.purpurea were treated by foliage application of 2 methyl 4 chlorine and 2,4 D, the results showed that at 650×10 -6 2 methyl 4 chlorine and 360×10 -6 2,4 D would kill the seedlings as soon as. Plants of P.purpurea and I.cairica were treated by foliage application of 2 methyl 4 chlorine and 2,4 D, the results showed that 650×10 -6 2 methyl 4 chlorine and 3 600×10 -6 2,4 D would kill the plants at day 5. One ml of 2,4 D,“RONSTAR” and “TORDON” was injected respectively into stem of I.cairica, the plant was killed entirely in day 2.
出处
《生态科学》
CSCD
2000年第2期77-79,共3页
Ecological Science