Abstract
The objective of the research was to study behaviour and parasitism efficiency of the egg parasitoid Trichogramma chilotraeae in relation to host and parasitoid density under laboratory condition. Eggs of Corcyra cephalonica were used as hosts for Trichogramma chilotraeae. Five different host (egg) densities: 3, 6, 12, 24 and 48 eggs were provided to one and two active female parasitoids T. chilotraeae. Percentage of parasitism, female progeny, and selfsuperparasitism were counted. Results showed that, host density was found to have a strong effect on parasitism rate, female progeny and selfsuperparasitism. Two parameters, parasitism and selfsuperparasitism decreases with increasing number of host density, in contrast, female progeny increase with increasing host density. Parasitoid density affected selfsuperparasitism and female progeny only on one level of host density (3 hosts) but not to all parameters of other density treatments.
Highlights
TnchoCxanha dapat ndjadi pili!Kd€m dapal nensdddikd irma pada fas palin ssal sehingga k€rusl r mr dalst dicesah sdini nuskin.
Ptsitoid T. chibtaeae merupals pd$noid lelu Ydg dikelalui nenyei g beberala hda.
P{4itoid ydg diguakd pada pdeliti& ini be@d ddi deal p€rtsndd kubis di daerdt Pansaiengan Bddug.
Summary
Kd€m dapal nensdddikd irma pada fas palin ssal sehingga k€rusl r mr dalst dicesah sdini nuskin. Ptsitoid T. chibtaeae merupals pd$noid lelu Ydg dikelalui nenyei g beberala hda. P{4itoid ydg diguakd pada pdeliti& ini be@d ddi deal p€rtsndd kubis di daerdt Pansaiengan Bddug. Ptu ellr ryiot.ld ymg ada pada daun kubis n€negusld hge (r,d colection nethod), 'telv lnE t€rkumpul dibawa ke labonrorim dan dii.Iabsike smpa p@itoid nucul ddi t€lu yEns terpd4ir Pmitoid kmudim dik€mbesbia$,n pad, rclu inalg pqeged. Nel€takltr telu, Tabug sldjltllya dil€bpad{4 pada klMge k s- S€tiap hdi lelu yeg dih$ilka! @pr.lr4iu sendiri dened cd neMbukMya lelu pada wadah yErs bensi cmpuru dedah dd pake. Smeda it!, pias (lotooean kdton yms boml.rm I x 4 cm) ymg bensi telu img dibut d€nge Ea mereka*e irus yag jMlalnya *suai d€nem perlalud yalti.3.6, 12,24 dm 48, Pis kenudid dimauk*o kedalm rabug realii ydg sudah berGi p@iloid dd dipapdkm selam tisa jm. Hsy, !dot Eltat& t toaa'anPa.6rqr lciuM betin! dan p@nlase kettu& jmtan ys dildilkd didlisis d€nem ANOVA dan dilaiutkd dense nji Trckey d 0,05, Pensadh Leladaun hdina diuji n€ngeualo uji I P€reolahu dala n€ngguake pregtu.di,ta
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