Mechanism of major disease vectoring insects and interrelationship between disease vector acquisition by aphids with changing temperature

Abstract

Limited study of mechanism of disease vectoring by insects in crops at local conditions of Chitwan district was observed. So, an analysis for the disease vectoring methods and their effect by fluctuating temperature was carried out in laboratory condition. Disease vectored insects and plant twigs samples were collected and studied in the laboratory of the Entomology department located at Agriculture and Forestry University, Chitwan, Nepal during December 2014 to February 2015. Molecular study of insects reared at laboratory condition was carried out to understand the mechanisms of disease transmission in different insect samples. The effect of fluctuating temperature (artificially maintained) was timely recorded to observe the change in duration of disease acquisition by aphid population. Variable types of mechanism of disease vectoring by insects was analyzed in the study location. Shorter acquisition period of disease vectoring aphids was directly correlated with the increasing temperature. After 250c the activities of some of the aphids in transmitting disease process gradually declined as they became lethal and inactive at that temperature. Therefore, different insects not only have specific disease transmitting mechanisms but also directly depend on the changing temperature parameters in the environment of the district.