Size and dispersion of urticating setae in three species of processionary moths

查看全文 作　　者：Edoardo PETRUCCO [1]TOFFOLO;Daniel [1]ZOVI;Chiara [1]PERIN;Paolo [1]PAOLUCCI;Alain [2]ROQUES;Andrea [1]BATTISTI;Helmuth [3]HORVATH 机构地区：[1]Department of Agronomy Food Natural Resources Animals and Environment-Entomology,University of Padova,Legnaro,Italy;[2]INRA,National Institute for Agricultural Research,Forest Zoology(UR 0633),Orleans,France;[3]Faculty of Physics,Aerosol and Environmental Physics,University of Vienna,Vienna,Austria 出　　处：《Integrative Zoology》索引2014年第9卷第3期,共8页 基　　金：This work was funded by the French National Research Agency in the framework of project ANR No.07BDIV 013‘URTI­CLIM’;by the University of Padova grant 2010-C91J10000320001. 摘　　要：Larvae of the processionary moths of the Palaearctic region bear urticating setae that are released against ver­tebrate predators,especially insectivorous birds.A few species are pests of forest and urban trees and,conse­quently,may threaten human and animal health during outbreaks,causing dermatitis,conjunctivitis and respira­tory distress.Although some studies provide detailed information about the setae,particularly those of the pine processionary moth Thaumetopoea pityocampa,there is little knowledge on the morphological traits of the setae and their release by the larvae.In the present study we identify major traits of the setae of 3 species of proces­sionary moth,T.pityocampa,T.pinivora and T.processionea,which are potentially helpful in the understanding of setae dynamics in the environment:(i)diameter and length of setae and(ii)analysis of dynamical properties of the setae in the airborne state.Setae are highly variable in size,with bimodal distribution in T.pityocampa and T.pinivora;in these 2 species,short and long setae are interspersed within the integument fields where they occur.The difference in the seta size has important consequences in dispersion,as smaller setae can spread 5 times further than their bigger counterparts.This information is relevant for a full understanding of the defen­sive importance of larval setae against natural enemies of the processionary moths,as well for elucidating the importance of the processionary setae as air pollutants,both close to the infested trees and at longer distances. 关 键 词：bio-aerosol LEPIDOPTERA pollution seta dispersion seta size Thaumetopoea