Wales. It is also naturalised on Lord Howe Island, Norfolk Island and Christmas Island (Navie 2004; Queensland Herbarium 2008). The yellow variety bears even more heavily than the red and generally has larger fruit. P. cattleyanum grows effectively in undisturbed areas, complicating restoration efforts in sensitive habitats. Its ubiquity in damaged ecosystems further muddles management due to its high dispersal from these less-sensitive habitats to more fragile habitats. P. cattleyanum acts as an invasive by creating dense thickets that crowd out sunlight, limiting the potential for other plant species to coexist. Its ability to thrive in a variety of different habitats under many different ecological conditions threatens native flora of many different habitat types. Additionally, its potential allelopathic qualities further complicate the ability of other plant species to coexist. Guava is also one of the most invasive species on Réunion where it is a threat to the endemic forests. Control Strategies A variety of management strategies have been applied to P. cattleyanum management efforts due to its ubiquity and the various ways it spreads. Despite the great threat that P. cattleyanum poses to many tropical ecosystems, some studies indicate that isolated groups can be totally eradicated after three to four years of proper management applications, such as cutting and burning mature individuals and applying herbicide to stumps. However, continued follow-up management is necessary indefinitely after a period of high-intensity restoration. This management strategy, known as the “special ecological areas,” is one of the strongest ways of controlling plant species over time. It works by focusing wood removal, burning, and other management efforts in the designated efforts. Feral pigs and non-native birds contribute to the spread of P. cattleyanum via seed dispersal. Thus, some control efforts involve removal and control of invasive fauna. However, results from such efforts are often unsuccessful due to the lack of dependence upon the animals for dispersal, as germination occurs under a wide variety of conditions. Another management technique is the introduction of insects that act as parasites on the invasive plants. This biological control approach is used because certain insects cause damage to P. cattleyanum in a way that either prevents the tree from reproducing or kills them outright. Most of the proposed insects infect the tree with bud or leaf galls, effectively preventing fruit growth or photosynthesis. For example, Diasineura gigantea caused bud galls that inhibited shoot growth. The Brazilian Scale is a potential