Termiticidal Activity ofParkia biglobosa(Jacq) Benth Seed Extracts on the TermiteCoptotermes intermediusSilvestri (Isoptera: Rhinotermitidae)

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Abstract

The chemical and mineral composition of raw and boiled seeds of the African locust bean, Parkia biglobosa(Jacq) Benth, was determined while the termiticidal action of the aqueous, alcoholic, and acetone extracts of the bean seeds were investigated. Variations in the proximate and mineral composition of the raw and boiled seeds were obtained while heavy minerals such as cadmium, cobalt, lead, nickel, and copper had been leached out of the seed during the process of boiling. Extracts from the raw seeds exhibited varying degree of termiticidal activity, while extracts from the boiled seed had no effect on the workers of Coptotermes intermediusSilvestri. Alcoholic extracts were more active than the aqueous and acetone extracts. Termites die within 30 min, 40 min, and 110 min when exposed to concentration of 4 g mL ⁻¹treatments of alcoholic, aqueous, and acetone extracts, respectively.

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Effects of heartwood extractive fractions of Thuja plicata and Chamaecyparis nootkatensis on wood degradation by termites or fungi

Adam M Taylor, Barbara Gartner, Jeffrey Morrell … (2006)

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Wood consumption rates of forest species by subterranean termites (Isoptera) under field conditions

Regina Peralta, Euripedes Barsanulfo Menezes, Acacio Geraldo de Carvalho … (2004)

Termites are well -known for their capacity to damage and destroy wood and wood products of all kinds in the tropics and subtropics. A field test was undertaken to evaluate variations in wood consumption of Pinus sp. and three species of Eucalyptus by subterranean termites. The test consisted of wooden stakes of each species being initially submitted to water immersion for 0, 24, 48 and 72 h, and buried in the ground to natural infestation by subterranean termites for an exposure period of 30, 45 and 60 days. Three species of subterranean termites were identified: Heterotermes longiceps (Snyder), Coptotermes gestroi (Wasmann) (Isoptera: Rhinotermitidae), and Nasutitermes jaraguae (Holmgren) (Isoptera: Termitidae). This is the first record of occurrence of H. longiceps in the state of Rio de Janeiro. Although the wood-consumption rates were not correlated significantly with their wood densities, there was a tendency of the softwoods (E. robusta and Pinus sp.) to be more consumed by subterranean termites than the woods of intermediate hardness (E. pellita and E. urophylla). Among the eucalyptus, E. robusta showed to be more susceptible to attack by subterranean termites than E. pellita and E. urophylla