酸模草（学名Oxalis pes-caprae）是一种源自南非的入侵物种，已在澳大利亚扎根成患[1]。这种植物以其鲜艳的黄花在冬季大量出现，给澳大利亚园丁带来持久困扰[1]。酸模草主要通过球茎和小球茎繁殖，虽然在澳大利亚引入种植通常不结实，但其繁殖能力依然顽强[1]。
植物体内含有大量草酸，虽然可食用，但过量消费曾导致严重后果——历史上曾有绵羊因过量摄入酸模草而死亡[1]。防治这一入侵物种需要策略和持久战。最佳防治时机是在开花前的冬季早中期进行，此时球茎资源已被耗尽[1]。有效的防治方法包括手工清除叶片和花蕾、割草、遮荫种植以及铺设75至100毫米厚的覆盖物[1]。虽然彻底根除酸模草并不容易，但通过数年的持续努力和耐心管理，这种顽固的杂草最终可以得到控制[1]。
Soursob (Oxalis pes-caprae), an invasive species native to South Africa, has become a widespread problem for Australian gardeners and landowners [1]. The plant is recognizable by its bright yellow flowers, which appear prominently throughout winter, and proves exceptionally difficult to eliminate once established [1]. While the weed reproduces primarily through bulbs and bulblets in Australia—typically failing to produce viable seed in the country—this reproductive strategy makes eradication particularly challenging [1].
The plant contains substantial amounts of oxalic acid, which renders it potentially toxic in large quantities; excessive consumption has historically caused livestock deaths, including sheep mortality [1]. Despite these hazards and the weed's persistent nature, control is achievable through sustained effort over several years [1]. The most effective approach involves targeting the plant before flowering during early to mid-winter, when bulbs have depleted their nutrient reserves [1]. Recommended control methods include hand removal of leaves and flower buds, mowing, shade planting, and applying mulch layers 75 to 100 millimeters thick [1]. Success requires long-term commitment and patience, but gardeners and land managers can ultimately bring the infestation under control [1].
