3 years ago

Tropical wood resistance to the West Indian drywood termite Cryptotermes brevis: If termites can't chew…

Marcelo M Haro, Nelsa Maria P Guedes, Terezinha Maria C Della Lucia, Lírio Cosme, Raul Narciso C Guedes
BACKGROUND The importance and impact of invasive species are usually considered based on their economic implications, particularly their direct damage. The West Indian drywood termite Cryptotermes brevis (Walker) is an example and concern in structural lumber, furniture, and other wood products. Despite its importance, its tropical wood preferences and wood physical characteristics contributing to resistance were not yet investigated. Here we developed wood testing units to allow the X-ray recording of termite colonization and then subsequently tested tropical wood resistance to the termite through free-choice and no-choice bioassays using these wood testing units. The relevance of wood density and hardness as determinants of such resistance was also tested, as was the termite mandible wear. RESULTS The wood testing units used allowed the assessment of the termite infestation and wood area loss allowing subsequent choice bioassays. While pine (Pinus sp.), jequitiba (Cariniana sp.) and angelim (Hymenolobium petraenum) exhibited heavier losses and higher infestations, the opposite took place with cumaru (Dipteryx odorata), guariuba (Clarisia racemosa), and purpleheart (Peltogyne sp.); courbaril (Hymenaea courbaril), eucalyptus (Eucalyptus sp.), and tatajuba (Bagassa guianensis) exhibited intermediary results. CONCLUSION Wood hardness and mainly wood density were key determinants of wood resistance to the termites, which exhibited lower infestations associated with greater mandible wear when infesting harder high-density wood.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ps.4785

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.