Abstract
In this investigation, biological control of eucalyptus Gall wasp, Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae) in Punjab, India was investigated. The genus Leptocybe Fisher & La Salle (Hymenoptera: Eulophidae) was founded with its type species, L. invasa from Israel in 2004. Adult wasps of L. invasa induce galls on the shoots and midribs of leaves of Eucalyptus sp. and also damage nursery seedlings and young plantations. In the present study, survey was carried out from the year 2012 to 2014, on gall wasp infestation in different eucalyptus growing areas of Punjab. Observations revealed that eucalyptus growing areas in Punjab were under the threat of attack by gall wasp, L. invasa. During the present study, biological control agents Megastimus viggianii and Quadrastichus mendeli have been successfully applied in the gall infested areas of Punjab, from 2012 to 2017, where infestation of gall wasp was regularly decreased and came below 10 % by July, 2017. Consequently, Eucalyptus gall forming insect L. invasa has been controlled successfully by applying the biological control through releasing the parasitoids (Megastimus viggianii and Quadrastichus mendeli), in Punjab, India.
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