Replacement control of pachyrhizua angulatus to invasive weed mikania micrantha

Abstract

The invention discloses replacement control of pachyrhizua angulatus to invasive weed mikania micrantha. It is discovered that the pachyrhizua angulatus can be regarded as a species which replaces andcontrols the mikania micrantha to inhibit invasion of the mikania micrantha. Pachyrhizua angulatus seeds are planted in soil of South China where the mikania micrantha is removed in advance, the pachyrhizua angulatus can rapidly occupy the vacant ecological niche after the mikania micrantha is removed, and the effect that the mikania micrantha are effectively controlled can be achieved at a relatively low density. Meanwhile, along with the increment of the cover degree of the pachyrhizua angulatus, photosynthesis of the mikania micrantha can be lowered, growth of the mikania micrantha is inhibited, landing and germination of mikania micrantha seeds can also be effectively stopped, and the mikania micrantha is prevented from establishing a new population. Quantity increment of the pachyrhizua angulatus seeds is beneficial for spreading and stability of the mikania micrantha population. In the soil where the pachyrhizua angulatus seeds are sowed, the species diversity is improved, the stability of the ecological system is improved, and the ability to resist exotic species invasion is improved.

Description

technical field [0001] The invention relates to the field of biological invasion control, in particular, the invention relates to the alternative control of kudzu root to the invasive weed Mikania micrantha. Background technique [0002] Mikania micrantha is native to tropical middle and South America, and is now distributed in tropical and subtropical regions such as Southeast Asia and southern China. It has caused serious damage to the ecology of the invaded areas (Li et al., 2000), and has been listed as the most harmful plant in the world. One of 100 invasive alien species. Mikania micrantha specimens were found in Shenzhen in 1984. Mikania micrantha appeared as a weed in Hong Kong around 1919 (Kong Guohui et al., 2000), and is now widely distributed in Hong Kong, China, central and southern regions of Guangdong, especially Shenzhen, Dongguan, Huizhou and other cities (Zhou Xianye et al., 2003; Zhang et al., 2004). Mikania micrantha likes to grow in sunny and humid roa...

AI Technical Summary

Problems solved by technology

Manual removal methods are time-consuming, costly, and labor-intensive, and Mikania micrantha will recover quickly. Chemical and biological control methods are not specific and may cause unexpected damage to other nearby species. to be studied

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