Paris Thomson M, Allan Sandra A, Udell Bradley J, Stansly Philip A
Entomology and Nematology Department, Indian River Research and Education Center, University of Florida, Fort Pierce, FL 34945, USA.
Center for Medical, Agricultural, and Veterinary Entomology (CMAVE), Agriculture Research Service (ARS), US Department of Agriculture (USDA), Gainesville, FL 32608, USA.
Insects. 2017 Aug 19;8(3):88. doi: 10.3390/insects8030088.
The Asian citrus psyllid, Kuwayama (Hemiptera: Liviidae), is a primary pest of citrus due to its status as a vector of the citrus disease, huanglongbing. We evaluated the effects of light of specific wavelength and polarization on phototactic behavior of using a horizontal bioassay arena. Wavelength-associated positive phototaxis was associated with short wavelength UV (350-405 nm) targets whereas little or no responses were seen in longer wavelength targets in the visible spectrum from green to orange (500-620 nm). Distance walked towards the visual target was greater for UV/blue wavelengths (350-430 nm) than for longer wavelengths. Distances walked towards 365 nm light were greater than to white light, and distances travelled to green, yellow and orange light were similar to those in darkness. A reduced light intensity decreased responses to white and UV (365 nm) light. Polarized light was discriminated and travelled greater distance in response to white vertically polarized light than to horizontally polarized or unpolarized light of equal intensity. Responses to polarized 405 nm light were greater than to unpolarized light, although without an effect of polarization plane. For 500 nm light, there was no difference between responses to polarized or unpolarized light. There was no effect of age on responses to 405 nm light although 1 day old psyllids travelled faster in the presence of 500 nm green compared to 4-7 day old psyllids. Movement in response to UV and relative stasis in response to longer wavelength light is consistent with observed behaviors of settling on foliage for feeding and dispersing out of the canopy when flush needed for reproduction is scarce.
亚洲柑橘木虱，Kuwayama（半翅目：木虱科），因其作为柑橘黄龙病的传播媒介，成为柑橘的主要害虫。我们使用水平生物测定场评估了特定波长和偏振光对亚洲柑橘木虱趋光行为的影响。与波长相关的正向趋光性与短波长紫外线（350 - 405纳米）目标相关，而在从绿色到橙色的可见光谱中较长波长目标（500 - 620纳米）几乎没有反应。向紫外线/蓝光波长（350 - 430纳米）视觉目标行走的距离比向较长波长目标行走的距离更远。向365纳米光行走的距离大于向白光行走的距离，向绿色、黄色和橙色光行走的距离与在黑暗中行走的距离相似。光强度降低会减少对白光和紫外线（365纳米）光的反应。偏振光可被区分，对垂直偏振白光的反应比对水平偏振或等强度非偏振光的反应行走距离更远。对偏振405纳米光的反应大于对非偏振光的反应，尽管没有偏振平面的影响。对于500纳米光，偏振光和非偏振光的反应没有差异。年龄对405纳米光的反应没有影响，尽管1日龄木虱在500纳米绿色光存在下比4 - 7日龄木虱移动得更快。对紫外线的移动反应以及对较长波长光的相对静止反应与观察到的行为一致，即在繁殖所需的新梢稀缺时，在树叶上停留取食以及从树冠中分散出去。
