Herbicidal activities of methanol extracts of 6 plants against some invasive weeds
The herbicidal activities of methanol extracts of Aralia armata (Wall. ) Seem. , Phyto-lacca americana L. ,Dipsacus chinensis Batal. ,Datura metel L. ,Pterocarya stinoptera C. DC. And Cir-sium japonicum DC. Were tested against the invasive weeds, Mikaina micrantha, Bidens pilosa Lin. , Conyza bonariensis (L. ) Cronq, Pistia stratiotes L. And Altemanthera philoxcroides (Mart. ) Griseb.. Results showed that after 7 d, at the concentration of 5. 000 mg/mL, the root inhibition rates of methanol extracts of D. Chinensis on M. Micrantha, B. Pilosa,C. Bonariensis and P. Stratiotes were 90. 05%, 83. 71%, 92. 68%, 100% respectively, while the inhibition rates of A. Armata on them were 79. 21%, 81.17%, 88. 09%, 100% respectively. Methanol extracts of A. Armata exhibited significant inhibition activity on P. Stratiotes,C. Bonariensis and B. Pilosa. The IC50 values were 0. 342 4, 0. 409 0 and 0. 696 6 mg/mL respectively. Methanol extracts of D. Chinensis and P. Americana showed high root inhibition effect to M. Micrantha,with the IC50 values low to 0. 721 0 and 0. 716 7 mg/mL respectively.
NETL
NSTL
万方数据
维普
