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The present paper reports the results of a pilot project on biological control of defoliator, Hyblaea puera Cramer (Lepidoptera : Hyblaeidae) and leaf skeletonizer, Eutectona machaeralis (Walker) (Lepidoptera : Pyralidae) by introduction of an indigenous egg parasitoid, Trichogramma raoi Nagaraja (Hymenoptera : Trichogramittidae) in natural forests and plantations of teak at Maharajpur Forest Range, Mandla Forest Division, Madhya Pradesh, during the year 2011-2012. To suppress the incidence of teak defoliator, H. puera and leaf skeletonizer, E. machaeralis, and to enhance the growth of teak trees, an egg parasitoid, T. raoi, was introduced in 100 ha in natural forests and 100 ha in plantations of teak @ 1.25 lakhs/ha in 10 installments during the population outbreak of target insect pests in monsoon showers. Releasing the wasps of parasitoid, T. raoi, proved significant (P<0.05-P<0.01) reduction of percentage defoliation/skeletonization and incidence of pests, H. puera and E. machaeralis and subsequently significant (P<0.001) enhancement of growth of teak trees occurred, both in natural forests and plantations of teak. All these findings advocate the potentiality of egg parasitoid, T. raoi, as a biocontrol agent for management of teak pests. This technique is ecofriendly, safer, non-toxic and pragmatic method of management of teak pests over large forest areas.
Hyblaea puera, Eutectona machaeralis, biological control, Trichogramma raoi
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