Competition Efficacy of Encarsia sophia and Eretmocerus sp. in Parasitism and Host Feeding on Whitefly, Bemisia tabaci
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Abstract
Encarsia sophia and Eretmocerus sp. were the two major parasitoids of whitefly, Bemisia tabaci. The parasitoids kill whitefly by parasitism and host feeding. The damage efficacy of the parasitoids between and the same species were allocated into Completely Randomize Design (CRD) with 20 replication. The parasitism rate of the same species of one parasitoid condition was more than two parasitoid conditions with 2.40 individual/day of E. sophia and 10.15 individual/day of Eretmocerus sp.. The parasitism rate of different species releasing at the same time was statistical different to release one following another. The same time species releaseof the two parasitoid showed the highest parasitism of 11.10 individual/day. In addition, there were interspecific interference competition between E. sophia and Eretmoceurus sp. in parasitizing and host feeding of B. tabaci. The parasitism rate was 10.05 individual/day when released of E. sophia first and following by Eretmocerus sp. after 24 hr. which was more parasitized host than releasing Eretmocerus sp. first and following by E. sophia after 24 hr. (8.95 individual/day). And the highest host feeding rate was in Eretmocerus sp. releasing first and following by E. sophia tr eatment. The results The results showed the recommendation of effective biological control of the whitefly by releasing E. sophia before Eretmocerussp. for 24 hr, at field condition.
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References
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