Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Eucalyptus gall - a recent invasive in man-modified forest ecosystem in Andhra Pradesh.

Abstract

A survey was conducted at different localities in Andhra Pradesh, India, during 2007-08 to study the spread of gall wasp (Leptocybe invasa) and the extent of damage in commercial clones extensively used by Forest Departments, Forest Development Corporations and farmers. Gall incidence in nurseries, plantations and coppice was assessed by random counting. Very high level of injury due to gall was observed in commercial clone 10. This clone was the most susceptible to gall damage. Low gall incidence was observed in clone 7; thus, this clone appeared to be tolerant or resistant to gall incidence. Clone no.3 showed moderate gall incidence and damage. In clone 10, most of the galls (90%) occurred on midribs, petioles and stems. In clones 3 and 7, galls occurred on midribs and petioles, and rarely on stems. The following Eucalyptus species were susceptible to L. invasa infestation: E. camaldulensis, E. tereticornis, E. botryoides, E. grandis, E. robusta, E. saligna, E. bridgesiana, E. globulus, E. gunnii and E. viminalis.