The invention provides a three-in-one efficient
solidago canadensis prevention and treatment method with seasonal pertinence, which comprises the following steps: firstly,
cutting an overground part in a full-bloom stage or before autumn, and spraying
glyphosate in spring to prevent residual seeds in a
soil seed bank from germinating; then, in winter,
benomyl is applied to break interaction of
arbuscular mycorrhizal fungi and
solidago canadensis, and after overground branches germinate in spring, a
glyphosate solution is sprayed to leaves; and finally, after the overground part is withered, removing residual vigorous subterranean stems to prevent recurrence in the next year. According to the method, invasion
weed prevention and control are carried out by trinity comprehensive utilization of physical, chemical and biological prevention and control methods and combination of growth characteristics of plants and microorganisms in different seasons from seed
diffusion of
solidago canadensis, overground plants and interaction relation between subterraneous stems and soil microorganisms, the prevention and
control effect is excellent, the cost and labor force can be reduced, and the method is suitable for large-scale popularization and application. The prevention and
treatment effect is long-term and relapse is difficult.