Evaluation of castor bean oil onAcacia niloticaas wood preservative againstOdontotermes obesus(Ramb.) (Termitidae: Isoptera)

Abstract

The sap and heart wooden stakes of Acacia nilotica var. indica, after seasoning and castor bean (Ricinis communis) oil application for exposure to workers of the termites, Odontotermes obesus (Ramb.), were placed in soil pits in completely randomised design with three replications. In each of seasoning and oil application, per cent weight loss of the wooden stakes were recorded and statistically analysed. Minimum per cent weight loss of sap and heart wooden stakes was observed in maximum period of seasoning (100°C for 15 days in oven drying and 60 days in sun drying method) and highest concentration of castor bean oil (20%) by vacuum pressure application. These results are discussed in relation to seasoning and castor bean oil application for wood protection against subterranean termites.

Evaluation of different plant derived oils as wood preservatives against subterranean termite Odontotermes obesus

“…Sapwood as well as heartwood samples were cut into smaller blocks (25 mm x 25 mm x 6 mm, 13 cm x 5 cm x 2 cm or 2 cm × 2 cm × 3 cm). Initial moisture contents of sapwood and heartwood were determined according to method adopted by Ahmed et al (2014). Seed oils of jatropha (Jatropha curcas Linn), jojoba (Simmondsia chinensis C.K.…”

“…Oils of numerous plants have been tested against termites and wood decay fungi Yang 2008, Laredo et al 2015). Hemp oil (Rapp and Sailer 2001), linseed and neem oil (Sailer and Rapp 2001, Paajanen and Ritschkoff 2002, Kartal et al 2006, Temiz et al 2013, Fatima and Morrell 2015, clove oil (Ahmed et al 2013) and castor bean oil (Ahmed et al 2014), all have the potential to protect wood from termite and fungal attack. Plant oils can be antimicrobial, antioxidant, antifeeding or repellent to termites as well as other invertebrates (George et al 2014).…”

“…Plant oils can be antimicrobial, antioxidant, antifeeding or repellent to termites as well as other invertebrates (George et al 2014). One property of some oils, besides their toxicity, is ability to transfer a toxicant deep into the wood (Ahmed et al 2013, Ahmed et al 2014, Fatima and Morrell 2015. Current study evaluated five plant-derived oil (Linseed, jatropha, jojoba, neem and Eucalyptus oil) as wood preservatives.…”

Termiticide activities of wood extractives of Ziziphus mauritiana (Rhamnaceae) against subterranean termites under field conditions

“…These stakes were tied using cable with fresh wooden stakes of similar dimension (130 x 50 x 20 mm LTR) from Z. mauritiana in the following order: fresh-boiled-fresh, boiled-fresh-boiled, freshboiled, fresh and boiled. Tied stakes (in triplicate) were placed in termite-infested soil pits already prepared for this purpose (Ahmed et al, 2014;Hassan et al, 2019a). Briefly, concrete soil pits (0.48×0.32 m wide and 0.40 m deep) were built inside Entomological Research Laboratories, at Post Graduate Agriculture Research Station, University of Agriculture Faisalabad, Pakistan.…”

“…Top of the pit was covered with iron sheet and soil was lined around the corners of iron top to seal it from rain. Soil pits were constructed in vicinity of subterranean termite nest as evidenced by the presence of nymphs in poly (vinyl chloride) corrugated monitoring pipes having cardboard as a bait (Ahmed et al, 2014). The wood specimens were placed horizontally on the cemented floor for experiments.…”