作者机构：
[成小文; 黄国华] College of Bio-safety Science and Technology,Hunan Agricultural University
会议名称：
害虫天敌的大量繁殖与商品化国际研讨会
会议时间：
2011-10-01
会议地点：
北京
会议论文集名称：
害虫天敌的大量繁殖与商品化国际研讨会论文集
关键词：
hymenopteran ascovirus;coleopteran ascovirus;hemolymph color;fat body cell cleavage;fat body droplet
摘要：
Insect specific ascoviruses have a circular DNA genome in the range of 119-186 kbp.They are only recently discovered due to no discernable symptom of insects infected with ascovirus.Since ascoviruses are transmitted by parasitic wasps in the field,extensive applications of broad spectrum chemical insecticides reduce the populations of wasps thus lead to scarcity of ascovirus in the environment.Ascoviruses were firstly discovered in noctuid larvae in the South East and West coast of the US in the late 80’s.However,in the 70’s,ascovirus-like particles were also reported in fire-ants(Hymenoptera) and alfalfa weevil(Coleoptera).Furthermore,ascovirus was discovered in the larvae of Diadromus pulchellus of Hymenoptera in southern France of Europe.These data suggest that ascoviruses might exist in different orders of insects such as Lepidoptera,Hymenoptera and Coleoptera,and have a global distribution.This is supported by the fact that ascoviruses have been reported in Australia,Indonesia,France,and USA.Interestingly,no ascovirus has been reported in large countries such as China,India or all of Africa.Efforts are needed to isolate more ascovirus in countries such as China and India and within the continent of Africa to confirm its world distribution,coevolution with insects,and the ecological significance in agriculture and natural environments.
作者机构：
Eco-Environment and Plan Protection Research Institute SAAS Shanghai201106 China;Eco-Environment and Plan Protection Research Institute SAAS Shanghai 201106 China;Shanghai Shi-Yuan Roof Greening Co Ltd Shanghai 200245 China;Hunan Agricultural University Changsha 410128 China
期刊：
2011 Fourth International Conference on Intelligent Computation Technology and Automation,2011年2:47-50
作者机构：
College of Mechanical and Electrical Engineering, Central South University, Changsha, China College;College of Engineering, Hunan Agricultural University, Changsha, China;College of Mechanical and Electrical Engineering, Central South University, Changsha, China
会议名称：
2011 Fourth International Conference on Intelligent Computation Technology and Automation(2011年第四届智能计算技术与自动化国际会议 ICICTA 2011)
会议时间：
2011-03-28
会议地点：
深圳
会议论文集名称：
2011 Fourth International Conference on Intelligent Computation Technology and Automation(2011年第四届智能计算技术与自动化国际会议 ICICTA 2011)论文集
摘要：
In order to realize the pinpoint of the work machinery in the paddy field, the receiver which can be used in the laser three-point location system has been designed. The laser receiver consists of MCU process circuit, photoelectric detection circuit, multi-channel gating circuit and differential-mode amplify circuit The photoelectric detection circuit is used to receive the laser signal, the multichannel gating circuit is controlled by MCU to select the channel, the differential-mode amplify circuit is used to eliminate the influence from natural light and the MCU process circuit is used to process the signals. The test results show that the laser receive circuit can receive the laser signals efficiently, filter the natural light and meet the requirement of the laser location in the short distance.
