灰茶尺蠖触角感器的扫描电镜观察

使用扫描电子显微镜对灰茶尺蠖Ectropis grisescens成虫触角感器的种类、形态和分布进行了观察。结果表明:灰茶尺蠖触角上主要存在3种感器,分别为毛形感器(sensilla trichodea, ST)、刺形感器(sensilla chaetica, SC)和栓锥形感器(sensilla styloconica, SS)。感器的种类和分布在雌雄成虫触角上没有差异。     

川硬皮肿腿蜂雌蜂触角超微结构观察

应用扫描电镜对川硬皮肿腿蜂两种类型雌蜂触角的外部形态结构进行了观察,结果表明:川硬皮肿腿蜂雌蜂触角上有18种感器,其中有毛形感器Ⅰ型、Ⅱ型,刺形感器Ⅰ型,锥形感器Ⅰ型,鳞形感器,栓锥形感器Ⅰ型、Ⅱ型,钟形感器,坛形感器,板形感器,柱形感器Ⅰ型、Ⅱ型,长锥形感器和边缘感器为两种类型共有,仅数量和分布存在差异;毛形感器Ⅳ型、锥形感器Ⅱ型只在有翅雌蜂触角上存在;毛形感器Ⅲ型、刺形感器Ⅱ型只在无翅雌蜂中存在。     

华山松大小蠹成虫触角感受器的扫描电镜观察

小蠹虫在入侵、定居和繁殖的整个生命过程中,无论是种内与种间的信息通讯与配偶的寻找,还是在寄主树木组织内的取食和繁殖数量的调节,均依赖于广泛分布于小蠹虫触角上的各种感受器(尤其是化学感受器)来接受或感受寄主树木次生代谢物质的引诱和对异性的准确定位(Byers,1995;陈辉,2003).     

野蚕黑卵蜂触角感器的超微结构研究

扫描电镜观察表明:野蚕黑卵蜂Telenomus theophilae Wu et Chen触角上存在着9种感觉器。其中锥形感器、毛形感器Ⅰ型、具沟端弯感器、多侧孔感器、栓锥感器和钟形感器雌雄均有,仅数量和分布存在差异;毛形感器Ⅱ型和端孔坛形感器只在雌蜂触角上存在,而端突柱形感器则为雄蜂所特有。感器种类、数量和分布在性别间的差异,为研究该蜂寻找生境和寄生行为提供了形态学依据。     

半闭弯尾姬蜂触角感觉器的超微结构研究

采用扫描电镜观察了半闭弯尾姬蜂触角表面的超微形态．结果表明，在雌、雄蜂的触角上共存在着7种感觉器，分别为毛形感觉器、刺形感觉器、板形感觉器、Boehm氏鬃毛、柱形感觉器、锥形感觉器、钟形感觉器．对触角感觉器的形态、分布进行了描述，并对两性间的差异进行了讨论。     

Effects of Various Degrees of Antennal Ablation on Mating and Oviposition Preferences of the Diamondback Moth,Plutella xylostella L.

Using scanning electron microscopy, we investigated the distribution of the trichoid, basiconic, and coeloconic sensilla on the antennae of the diamondback moth （DBM;Plutella xylostella）. The trichoid sensilla were the most abundant sensory organ, and the male moth antennae host signiifcantly more trichoid sensilla than female moth antennae. Conversely, basiconic and coeloconic sensilla were found more frequently on female than on male antennae. We performed experiments with various degrees of antennal ablation and demonstrated that DBM antennae played a key role in the control of mating and oviposition. We found that neither oviposition preference nor mating behaviors changed signiifcantly when less than 1/4 of both antennae were removed. However, there was a signiifcant behavioral change when the antennae were ablated by more than half. As the length of the antenna was shortened, the successful mating rate decreased and mating peak was delayed. An otherwise consistent host preference for oviposition was eliminated when both antennae were completely removed. Furthermore, we found that the number of trichoid sensilla was positively correlated with mating rate and oviposition preference. However, the numbers of basiconic and coeloconic sensilla were not correlated with mating rate and mating peak, but highly correlated with oviposition preference. Taken together, our results indicate that antennal sensory information plays a critical role in the mating and oviposition behaviors of this economically important pest.     

基于无线传感器网络的稻田信息实时监测系统

针对农田环境信息采集过程中监测周期长、环境干扰大等特点,设计了一种基于混合天线无线传感器网络稻田环境信息实时监测系统,采用分簇路由协议进行组网,为不同类型的节点配置不同类型的天线,并使用转台控制汇聚节点定向天线的方向,以扩大网络的覆盖范围和提高系统的稳定性。基于该系统进行长时间稻田组网试验,对网络丢包率和稻田环境参数采集准确性进行测试,试验结果表明,系统运行稳定、测量准确,网络数据平均丢包率为0.44%,稻田空气温度、空气相对湿度和土壤含水率的平均相对误差分别为0.26%、0.64%和0.33%。     

微波电路电测及其计算方法

从实际工程的角度出发，对电路电测方法进行了论述。在微通信工程中，需要获得障碍物的位置和高度，最合理的天线高度组合和障碍物绕射损耗等参数，为此论述了微波电路电测方法及技术要求。在大庆－秦皇岛输油管道通信工程中采用了Ａ，Ｂ测试法进行测试，得到高度－损耗曲线。这种曲线给出相对自由空间接收电平与收，发天线高度之间的关系。在测试所得的高度－损耗曲线与断面图相结合的基础上，由绕射损耗计算公式推出了几种常见障碍     

Ultrastructure of the sensilla on antennae and mouthparts of larval and adult Plutella xylostella (Lepidoptera: Plutellidae)

Plutella xylostella (L.) (Plutellidae) is an important agricultural pest throughout the world. In this study, the morphology of antennal and mouthpart sensilla in the larvae and adults of P. xylostella (L.) was observed by using a scanning electron microscope. The larval antennae possess six sensilla basiconica, two sensilla chaetica and one sensillum styloconicum. Larval mouthparts possess six types of sensilla: sensilla chaetica, sensilla digitiformia, sensilla epipharyngeal, sensilla basiconica, sensilla styloconica and sensilla placodea. In the adult, seven types of sensilla are found on the antennae in males and six types of sensilla (sensilla basiconica absent) occur in females. Sexual dimorphism is also found in the number and size of these sensilla on the antennae of adults. We describe for the first time the five types of sensilla on the mouthparts of the adult of P. xylostella. This study provides useful information for further research into the function of these sensilla, and better understanding the behavioral mechanisms involved in pest control.