Your search resulted in 11 documents.
Antitermitic activities of Shisham (Dalbergia sissoo Roxb.) heartwood extractives against two termite species
2016 - IRG/WP 16-10856
Shisham (Dalbergia sissoo) heartwood extractives were investigated for antitermitic activities against Heterotermes indicola and Reticulitermes flavipes. Heartwood extractives were removed from wood shavings by soxhlet extraction using (2:1) ethanol: toluene as the solvent system. Filter paper bioassays were conducted against both species to observe concentration dependent feeding response and mor...
B Hassan, M Mankowski, G Kirker, S Ahmed, M Misbah ul Haq
GC-MS Characterizations of Termiticidal Heartwood Extractives from Wood Species Utilized in Pakistan
2016 - IRG/WP 16-10857
Wood species that exhibit innate tolerance to wood destroying organisms such as termites are considered to be naturally durable. This durability can, in part, be due to the complex chemical compounds in the heartwood of naturally durable wood species. We examined the effects of varying concentrations of heartwood extractives on the subterranean termite, Reticulitermes flavipes from four wood spec...
M E Mankowski, B Boyd, B Hassan, G T Kirker
Laboratory evaluations of woods from Pakistan and their extractives against Postia placenta and Trametes versicolor
2016 - M Mankowski, B Hassan, A Bishell, G Kirker
Natural durable wood species are those which exhibit innate tolerance to wood decay organisms such as fungi and termites. The goal of this study was to evaluate 4 wood species (Dalbergia sissoo, Cedrus deodara, Morus alba and Pinus roxburghii) from Pakistan in order to determine their resistance to both a model brown (Postia placenta) and white (Trametes versicolor) rot fungus compared to a durabl...
M Mankowski, B Hassan, A Bishell, G Kirker
Effects of teak, Tectona grandis Linn, heartwood extractives against Heterotermes indicola (Isoptera; Rhinotermitidae)
2018 - IRG/WP 18-10910
Heartwood extractives from Tectona grandis were investigated for antitermitic activities against Heterotermes indicola in laboratory experiments. Extractives were removed from wood shavings by soxhlet extraction using an ethanol: toluene (2:1) solvent system. Termite feeding and mortality followed a concentration dependent response. The highest termite mortality occurred at an extractive concentra...
B Hassan, S Ahmed, M Mankowski, G Kirker, R E Ibach, M Misbah ul Haq
Effect of a Water Repellent Treatment on Moisture Behavior of Three Australian Hardwoods: A Preliminary Report
2021 - IRG/WP 21-40921
Wood is inherently hygroscopic and will sorb moisture either directly from the atmosphere or via capillary action. Moisture can have marked effects on wood properties and repeated wetting and drying creates dimensional changes that lead to physical damage. Exposure to elevated moisture levels also increases the risk of fungal attack.
Wood preservatives have long been used to minimize the risk of ...
B Hassan, J J Morrell, K Wood
Effect of densification of Eucalyptus nitens and E. obliqua on moisture uptake, swelling, decay resistance, and fire performance
2022 - IRG/WP 22-40946
Some Australian Eucalyptus species that are abundantly available have low natural durability and poor resistance to fire. These same species are also extremely difficult to treat with preservatives or fire retardants using conventional pressure treatment methods due to a large proportion of refractory heartwood. The aim of this research was to understand whether thermo-mechanical densification had...
B Hassan, J J Morrell, F Wiesner, W Wu, B Belleville, K C Wood
Biological durability for novel composites manufactured from green materials
2022 - IRG/WP 22-40960
Flax and Jute fabrics were used as reinforcements with polyester resin to form composite skins while poplar particleboard was used as a core for making composite sandwich structures by applying vacuum assisted resin transfer molding (VARTM) technique. Mechanical, physical, and biological properties of these novel green composite sandwich structures were evaluated. The results showed that the propo...
A S O Mohareb, A H Hassanin, A A Badr, K T S Hassan, R Farag
Management of invasive West Indian drywood termite in Queensland: Transition from mandatory to voluntary treatment
2023 - IRG/WP 23-11002
Cryptotermes brevis, the West Indian drywood termite (WIDT) is the most destructive drywood termite globally. It is capable of infesting both softwoods and hardwoods in timber structures. In Australia C. brevis was first discovered in 1940s and later an established infestation was discovered in Maryborough, Queensland in 1966 and then in Brisbane and Bundaberg in 1975. In 1977 the Queensland Gover...
C Fitzgerald, B Hassan
Susceptibility of selected Australian commercial timbers to West Indian drywood termite Cryptotermes brevis
2023 - IRG/WP 23-11003
West Indian drywood termite (Cryptotermes brevis) is a globally distributed timber pest and is invasive in Queensland, Australia, causing widespread damage to structures and large economic impacts in control and repair costs. Despite this, the knowledge of which specific timbers are susceptible to attack is limited and requires investigation. Two six-week feeding trials were performed, exposing se...
W Haigh, R A Hayes, B Hassan
Synergized pyrethrins insecticide as a spot treatment option for West Indian drywood termites
2023 - IRG/WP 23-11004
Pyrethrin is a natural biopesticide with relatively low mammalian toxicity. Two identical products in Australia contain pyrethrin in liquid CO2-propelled aerosol, Pestigas from BOC international and SupaPy Supagas. In the current study, the toxicity of SupaPy was tested against West Indian drywood termite Cryptotermes brevis as an option for spot treatment of this pest. Termites were exposed to wo...
B Hassan, C J Fitzgerald
Investigating wood anatomical factors influencing the treatability of refractory southern pine- an imaging approach
2023 - IRG/WP 23-40975
Southern pine sapwood is non-durable, and preservative treatment is necessary to protect it against biological degradation. According to AS 1604.1 2021, timber products must have their sapwood fully treated with preservatives for various applications and hazard classes. However, there is a growing industry concern over the refractory sections of sapwood, which are untreated pockets of wood that do...
M Shirmohammadi, M R Karbaschi, B Hassan, W Leggate