Rising temperatures can enhance foraging activity and accelerate the encounter rate of different predators, which may increase their interference competition strengths. However, limited information is available on such effects of temperature, and on the consequences for their predation rates. We used a functional response approach to experimentally quantify the interspecific interference competition strength of two species of ladybirds, Harmonia axyridis and Propylea japonica (Coleoptera: Coccinellidae), toward their prey Myzus persicae (Hemiptera: Aphididae) at 23 and 33 °C, respectively. The results indicated that high temperature could cause P. japonica to be more active and interfere with H. axyridis more often, and strengthened the interference competition between these two predators. The functional response of H. axyridis was changed from type II in single H. axyridis treatment to type III in paired predator assays at 23 and 33 °C. Moreover, single H. axyridis consumed more aphids than H. axyridis in heterospecific predator trials at aphid densities below 50 and 35 at 23 and 33 °C treatments, respectively. For P. japonica, type II functional responses were detected in all assays. Additionally, when competing with H. axyridis, the predation rate of P. japonica at 23 °C was almost unchanged compared to that of single P. japonica, but fewer aphids were eaten compared with single P. japonica across all aphid densities at 33 °C. Thus, with interference competition, two predator species respond differently to temperature changes in terms of foraging efficiency, which may further affect the population adaptability and control efficiency of these two focal species.

气温升高可以增强觅食活动并加快不同捕食者的遭遇速度，这可能会增加它们的干扰竞争强度。然而，关于温度的这种影响及其捕食率的后果的信息有限。我们使用功能响应方法来实验量化两种瓢虫异色瓢虫和粳甲（鞘翅目：瓢虫科）在 23 和 33°C 下对它们的猎物桃蚜（半翅目：蚜科）的种间干扰竞争强度，分别。结果表明，高温可能会导致粳稻更加活跃并干扰异色瓢虫。更频繁，并加强了这两种掠食者之间的干扰竞争。在 23 和 33 °C 的成对捕食者试验中，异色瓢虫的功能反应从单一异色瓢虫处理中的II型变为III型。此外，在 23 和 33 °C 处理下，在蚜虫密度分别低于 50 和 35 的异种捕食者试验中，单个异色瓢虫消耗的蚜虫比异色瓢虫多。对于P. japonica，在所有测定中均检测到 II 型功能反应。此外，在与异色瓢虫竞争时，23 ℃时，粳稻的捕食率与单一粳稻相比几乎没有变化。，但在 33 °C 的所有蚜虫密度下，与单个P. japonica相比，食用的蚜虫数量较少。因此，由于干扰竞争，两种捕食者物种在觅食效率方面对温度变化的反应不同，这可能进一步影响这两种焦点物种的种群适应性和控制效率。