The Kuroshio shot hole borer (KSHB) Euwallacea kuroshio is an invasive ambrosia beetle pest in Southern California, where it causes Fusarium dieback in a number of different host tree species. Since its discovery in California in about 2014, the KSHB has established or been identified across a wide geographic range along the California coast, spanning north from the Mexican border to San Luis Obispo. KSHB were reared at temperatures ranging from 16 to 32 °C to determine the effect of temperature on development and emergence rates, brood size, and colonization success. The highest total emergence and number of successful colonies occurred when KSHB was reared at 28 °C. Mean days until first offspring emergence decreased as temperature increased up to 30 °C, after which emergence ceased. The thermal constant was estimated to be 318 degree‐days. Using this approximation in conjunction with weather data from the California Irrigation Management Information System, we predict the annual number of generations of KSHB in several locations across its invasive range in California. Results can be used to predict the timing and number of generations in other invaded areas, as well as estimate the range of this pest.

中文翻译：

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温度对侵入性甘草甲虫 Euwallacea kuroshio（鞘翅目：Scolytinae）的繁殖力、发育和出现的影响

黑潮小孔螟 (KSHB) Euwallacea kuroshio 是南加利福尼亚州的一种侵入性甘草甲虫害虫，在那里它导致许多不同寄主树种的镰刀菌枯死。自 2014 年左右在加利福尼亚州发现以来，KSHB 已在加利福尼亚海岸沿线的广泛地理范围内建立或确定，从墨西哥边境向北延伸到圣路易斯奥比斯波。KSHB 在 16 至 32 °C 的温度范围内饲养，以确定温度对发育和出苗率、育雏大小和定殖成功的影响。当 KSHB 在 28 °C 下饲养时，出现最高的总出苗率和成功菌落数。随着温度升高到 30 °C，直到第一个后代出现的平均天数减少，之后出现停止。热常数估计为 318 度-日。使用这种近似值与来自加利福尼亚灌溉管理信息系统的天气数据相结合，我们预测了加利福尼亚州入侵范围内几个地点的 KSHB 年代数。结果可用于预测其他入侵地区的时间和世代数，以及估计该害虫的范围。