11009

10140

كارشناسي ارشد

حشره شناسي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1394

نه، 59ص.: مصور

نفيسه پورجواد

مسعود بهار

جهانگير خواجه علي، حسن كريم مجني

1394/12/05

مهندسي كشاورزي

ID10140

60 Response of Several Trichogramma Species to the Sex Pheromone of Tuta absoluta Lep Gelechiidae Samira Ahmadi Samira ahmadi@ag iut ac ir Samiraahmadi570@yahoo com January 6 2016 Department of Plant Protection Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor N Poorjavad npoorjavad@cc iut ac ir Abstract The tomato leafminer Tuta absoluta Lepidoptera Gelechiidae is a major pest in tomato in greenhouses and fields in Iran The use of sex pheromone of T absoluta together with releases of the parasitoids wasps of the Trichogramma genus Hym Trichogrammatidae are here considered as a control strategy against T absoluta Howevere because the behavior of several species of parasitoids is known to be affected by the sex pheromones of their hosts the possible indirect effects of pheromone based control of the pest insect on their natural enemies should also be considered when using pheromones for pest control In this work responses of female wasps of three populations of T evanescens Wolbachia uninfected W T brassicae and Wolbachia infected W T brassicae to sex pheromone of T absoluta were studied under laboratory conditions The results revealed that only female wasps of T evanescens and T brassicae W were attracted to synthetic pheromone and calling virgin female moths around 62 and 75 respectively Also their responses were affected by the wasp age and ambient temperature One days old wasps were attracted more than three and five day old wasps to the sex pheromone and their responses at 30 C were more than that of 35 C and 25 C T brassicae W did not respond to the sex pheromone of the T absoluta Investigating the effect of experience previous exposure to the host pheromone showed that in T evanescence and T brassicae W experience reduced the response to sex pheromone but in T brassicae W enhanced it The fertility life table parameters were assessed for three populations under two different treatments synthetic pheromone release and control The results showed that several life table parameters were reduced under the pheromone treatment for example in T brassicae W net reproductive rate R0 the gross reproductive rate Grr generation time T age specific survival rate lx female longevity percentage of adult emergence and the number of parasitized eggs per female in T brassicae W age specific survival rate lx female longevity and percentage of adult emergence and in T evanescence age specific survival rate lx but significant changes were not observed in the other parameters Attraction of parasitoids to the synthetic sex pheromone of T absoluta was measured in the greenhouse conditions There was no record of the parasitoid in pheromone traps These results help to determine integrated pest management program for control of T absoluta Key words Egg parasitoids Sex pheromone Olfactometer Fertility life table Mating behavior

نفيسه پورجواد

مسعود بهار

جهانگير خواجه علي، حسن كريم مجني