PENGARUH LAMA KETIADAAN INANG Spodoptera litura TERHADAP KEBUGARAN PARASITOID Snellenius manilae DENGAN MENGGUNAKAN MANOVA

Sri Ningsih Desi Afriany, Budi Susetyo, Damayanti Buchori

Abstract


Snellenius manilae is a parasitoid species that
attacks insect pests of plants that can be used as a biological
control agent. One of the hosts for this parasitoid is caterpillar
Spodoptera litura (as host) which is insect pests. These parasitoids
lay eggs on the inside of the host and grow in the host.
This study aims to determine the effect of the long absence
of host parasitoid reproductive ability. Dependent variables in
this case are the total parasitoid eggs laid, eggs remaining
in the parasitoids’ ovaries after death, parasitoid longevity,
number of eggs laid on day 8, and the excess parasitoid eggs
laid (superparasitism). The multivariate analysis of variance
(MANOVA) is used in this study to examine the effect of
the treatment of multiple responses simultaneously. Testing
the multivariate normality assumption, equality of several
covariance matrices and degree of freedom. The result of
MANOVA analysis shows that the Wilk’s Lambda test statistic
with p value less than the significance level (0.05). Based on
these results it can be concluded that the long absence of the
host gives a different effect on parasitoid fitness. Comparison of
mean vector treatment on Hotelling T2 test results shows that
the long absence of host has significant effect on parasitoid
fitness. Test results of profile analyzes of the 14 treatments,
there are three treatment groups with profiles that shows
parallel and coincident the hypothesis ie P1 and Control, P2
P3 P8 and P9 and P11 and P12.
Keywords-host deprivation, MANOVA, parasitoid


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DOI: https://doi.org/10.29244/xplore.v1i1.12425

Redaksi: Departemen Statistika - Jl. Meranti Wing 22 Level 4, Kampus IPB Darmaga Bogor 16680 (email : xplore.stkipb@yahoo.com)

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