Recent reviews show that classical weed biocontrol measures can be successful in reducing the negative impacts of invasive plant species, have impressive returns on investment, and contribute to slower rates of weed spread. Quantitative post-release monitoring is necessary to account for differences in biocontrol outcomes across spatial and temporal scales. Direct nontarget attack (NTA) incidence and severity are decreasing over time, and pre-release host-specificity tests can accurately predict NTA post-release, as long as the nontarget plant species are included in testing. Less than 1% of NTA was found where the impacted plant species had been tested pre-release and was deemed not at risk. Effectiveness and environmental safety will likely further improve with the incorporation of new technologies, such as experimental evolutionary studies.

最近的评论表明，经典的杂草生物防治措施可以成功减少入侵植物物种的负面影响，具有可观的投资回报，并有助于降低杂草的扩散速度。释放后的定量监测对于解决跨时空尺度的生物防治结果的差异是必要的。随着时间的推移，直接非目标攻击（NTA）的发生率和严重性正在降低，只要测试中包括非目标植物物种，释放前宿主特异性测试就可以准确预测释放后NTA。在释放前对受影响的植物进行了测试，认为没有危险，发现不到NTA的1％。随着诸如实验进化研究等新技术的引入，有效性和环境安全性可能会进一步提高。