Euwallacea fornicatus

The tea shot hole borer has been known to cause devastating damage to tea (Camellia sinensis) in at least ten different countries,[4] including India and Sri Lanka where it is a major economic pest.[5] In 2009, specimens matching the description for E. fornicatus were introduced into Israel, where they were documented as vectors of a new fungal plant pathogen in avocado trees. In 2012, similar fungal disease was recorded in avocado trees in California (CA).[3] Since 2007, specimens of E. fornicatus have been documented in Florida on avocado trees. However, it is not considered a health threat because no disease is expressed.[6]

Even though several taxa were synonymized under the name E. fornicatus due to morphological similarity, some of the clades are different in terms of economic severity. Euwallacea fornicatus is considered a species complex, with several clades that occur in separate regions of Southeast Asia and develop in different hosts.[2] Phylogenetic work using the DNA mitochondrial gene COI suggested that there are three major clades within the species E. fornicatus, supporting the idea of at least three different species with phylogeographic boundaries within the species complex.[7]

The first clade proposed, E. fornicatus sensu stricto (commonly called the tea shot hole borer), is originally from southern Southeast Asia and was introduced into Hawaii and Florida. A second clade, the Kuroshio shot hole borer, is believed to have originated in the Pacific Islands and has since been introduced into San Diego county, California. The third clade is thought to originate from a more northern range in Southeast Asia and to have since been introduced into Los Angeles, California, Israel and South Africa.[8] This last clade has been given the common name polyphagous shot hole borer in reference to the very broad host range. It has been severely affecting avocado trees in association with several Fusarium species.[9] Its impact has impacted many trees in San Diego County, as far south as the Tijuana River Valley Regional Park.[10] Multiple populations of the E. fornicatus complex have been introduced throughout the world, causing different damage in each region where they have been recently introduced.

See Wallacea, region of Indonesian islands named after the naturalist Alfred Russel Wallace.

The most recommended management strategies include sanitation of infected hosts and avoiding the spread of infected material. Chemical control can be considered in hosts which are not part of human consumption and some attempts of biological control have been made with little success. Moreover, resistant or tolerant varieties are considered an important aspect of the integrated pest management for this pest.[11]

• Ambrosia Beetle
• Forest pathology
• Laurel wilt disease
• Xyleborus glabratus