| With field experiment method, the conditions of Eupatorium and weeds around them growth were observed after sprayed four
different concentrations (0.5%,1%,1.5%,2%) growth inhibitor to determined eupatorium selection.The results indicated that Eupatorium sensitive plant growth inhibitor could control aerial part of Eupatorium fast and visibly, Eupatorium suffered harm after spraying two hours,and the more severity with increasing concentrations; five days later, the controlling effect of each plant were 41.5% by 0.5% growth inhibitor, 90.2% by 1% growth inhibitor,100% by 1.5% and 2% growth inhibitor;15 days later, fresh weight controlling effect were 64.6%,91.7%,98.9%,100% using 0.5%,1%,1.5%,2% growth inhibitor, respectively; but it had limited influence with Eupatorium roots, new branches would sprout from its basal when low concentration. Meanwhile, Eupatorium plant growth inhibitor can爷t harm other plants around them,with sensitivity and selection.So the result showed that using sensitivity to control Eupatorium growth was feasible and effective. When
the concentration of growth inhibitor up to or over 1.5%, it could control visibly and kill Eupatorium quickly. |
