清除加拿大一枝黄花的方式有四种。一是人工铲除。在苗期或种子成熟前，剪掉花头，连根拔除植株并 清理地下根茎，集中焚烧或者无害化处理植株。二是机械防除。对大面积或农田的加拿大一枝黄花可采 取机械防除。可用镰刀或割草机割除地上部分，随后用旋耕机翻耕土地（深度10厘米以上）以清除地下 根茎。三是化学防治。在幼苗期（20厘米—50厘米）进行施药效果最好。针对农田、果园、林地、荒 地、公路铁路坡地等生境选用不同除草剂和喷施方法。彻底清理后及时种植农作物或绿化植物，占据生 态位，防止其死灰复燃。农田的加拿大一枝黄花通过连续种植两季农作物可根除；绿化带则需要加强日 常防护，发现再生植株即予清除。四是生物防治。芦苇根系发达，种植芦苇可抑制其扩散。真菌锈菌、 土生真菌能迅速感染并杀死加拿大一枝黄花。 加拿大一枝黄花原产于北美，1935年作为庭院观赏植物引入上海、南京等地栽植，上世纪80年代扩散至 河滩、荒地、路边及部分农田，成为中国一种常见的恶性杂草。它入侵我国很多省（自治区、直辖 市），严重危害本土植物的生存，2023年1月被列入《重点管理外来入侵物种名录》，成为重点管理的 重大农林入侵物种，当前仍在不断蔓延。加拿大一枝黄花颜 ...

Core Viewpoint - The emergence of the invasive species "Canadian goldenrod" in Shanghai's Pudong New Area has prompted urgent cleanup actions due to its rapid spread and ecological threat [1][3]. Group 1: Invasive Species Characteristics - "Canadian goldenrod," introduced to China in the 1930s as an ornamental plant, has now spread to over 20 provinces, extending its range to northern and northeastern regions [1]. - This species can produce over 20,000 seeds per plant during its flowering period from July to November, with seeds capable of being dispersed over several kilometers [1]. - It can also reproduce asexually through underground rhizomes, leading to explosive growth patterns, described as "one flower blooms and hundreds die" due to its aggressive nature [1]. Group 2: Ecological Impact - The plant alters soil pH by secreting acidic substances, leading to soil compaction and acidification, which threatens native plant species and disrupts biodiversity [2]. - The invasive species can dominate ecosystems, creating monocultures that severely impact the structure of local ecosystems [2]. Group 3: Control Measures - Experts recommend immediate removal of suspected plants, with professional cleanup required before seed maturity, including mechanical removal of underground rhizomes and soil deep plowing [2]. - Continuous monitoring for over three years post-removal is necessary to prevent regrowth [2]. - Public awareness and participation are crucial for early detection and control of invasive species, emphasizing the need for community involvement in ecological protection [3].

Core Viewpoint - The discovery of "Canadian Goldenrod," an invasive species, in Shanghai highlights its rapid growth and potential ecological damage, prompting immediate cleanup efforts by local authorities [1][3]. Group 1: Invasive Species Characteristics - "Canadian Goldenrod" can release over 20,000 seeds from a single plant, showcasing its strong propagation ability [1]. - Originally from North America, it was introduced to China in 1935 as an ornamental plant and became a significant weed by the 1980s [1]. - The plant's flowering and fruiting period is from July to November, and it can thrive in various environments, including slopes, forests, and wetlands [3]. Group 2: Ecological Impact - The plant's aggressive growth can lead to soil degradation, as it competes for water and sunlight, potentially causing other plants to die off [4]. - Its extensive root system can compact the soil, leading to reduced soil quality and increased acidity, which can further harm local ecosystems [4]. - The plant's pollen can trigger allergic reactions, with severe cases resulting in symptoms like hives [3]. Group 3: Cleanup Efforts - Local authorities have initiated cleanup operations, utilizing bulldozers to remove the roots and rework the soil in affected areas [3]. - Approximately 20 acres of "Canadian Goldenrod" have been cleared after a day of intensive work [4]. - Residents are advised to report sightings of the plant to local departments to prevent further spread [4].

Core Viewpoint - The sale of "wild turtles" in various locations has raised concerns, as these turtles are primarily identified as Florida softshell turtles, an invasive species that poses ecological threats and is unsuitable for consumption or release into the wild [1][4][19] Group 1: Identification and Characteristics of Florida Softshell Turtle - Florida softshell turtles, also known as pearl turtles, have a smooth, oval shape, medium-sized head, and robust limbs with webbed feet [5] - They are native to the United States and primarily feed on soft-bodied animals, crustaceans, and fish, exhibiting rapid growth and strong adaptability [7] Group 2: Ecological Impact - Upon being released into Chinese waters, Florida softshell turtles can aggressively compete for territory, threatening native turtle populations and overall biodiversity, earning them the title of "freshwater tyrants" [8] - The article highlights other invasive species that pose similar ecological risks, such as Canadian goldenrod, smooth cordgrass, and apple snails, which disrupt local ecosystems and agricultural practices [9][11][13][14][15] Group 3: Recommendations and Actions - The article emphasizes that releasing animals into the wild does not equate to doing good; instead, it can have detrimental effects on ecosystems [17] - It advises the public to report the sale of such animals and to engage in responsible wildlife management practices, including only releasing native species and supporting conservation efforts [17][19]

Group 1 - The popularity of "exotic pets" in China is rising, with over 17 million people reportedly keeping them, which includes non-traditional animals like snakes, lizards, and spiders [1] - There are significant safety concerns associated with the ownership and importation of exotic pets, particularly regarding the potential ecological impact of invasive species [7][21] - Illegal importation of exotic species is occurring, with recent incidents involving travelers attempting to smuggle various foreign animals into the country [3][8] Group 2 - The introduction of foreign species can lead to severe ecological consequences, including threats to native species and agricultural production [19][23] - Specific examples of harmful invasive species include the "Canadian goldenrod" and "muti-flowered cordgrass," which have shown strong reproductive capabilities and can outcompete native flora [28][31] - The Chinese government is taking measures to combat the spread of invasive species, including a national survey every ten years and the implementation of control plans for specific invasive plants [33]