Effects of selected residual soil termiticides on Coptotermes curvignathus Holmgren (Insecta: Isoptera: Rhinotermitidae) of oil palm in peat

Lim, Guan Miaw (2007) Effects of selected residual soil termiticides on Coptotermes curvignathus Holmgren (Insecta: Isoptera: Rhinotermitidae) of oil palm in peat. [Project Paper] (Submitted)

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Abstract

Coptotermes curvignathus Holmgren (lnsecta: Isoptera: Rhinotermitidae) infestation is a serious problem of oil palm planted in peat. Chemical control with suitable termiticides remained the most common control method for the pest termite. A study was conducted to evaluate the effectiveness and natural aging effects of five selected chemicals (spinosad, chlorpyrifos, imidacloprid, fipronil and a coded termiticide DE-175SC). During the laboratory bioassay, the wood consumption rate on rubber wood blocks that served as bait for termites varied in the range of 0.013 to 0.071 g across all treatments. The visual ratings confirmed that the termites did feed on the rubber wood blocks placed in the feeding chamber. At 21 days post-treatment (DPT) of the laboratory residuality study, spinosad and imidacloprid showed significant differences in mortality in the range of 25.82 to 60.73 % across the concentrations. However, the 42-DPT showed no significant differences in mortality across all concentrations and depths. This was because the residue effects of the termiticides still showed a high mortality in the range of 49.72 to 70.51 %. Generally, there were significant differences in mortality among all of the selected termiticides in 21-DPT and 42-DPT, while both experiments also showed high mortality above 34 and 49 %, respectively. After 42-DPT, all the termiticides still caused a high mortality rate. Thus, further studies have to be done to continue on this bioassay to determine the actual time that the residues started to deteriorate and become less effective.

Item Type:	Project Paper
Faculty:	Faculty of Agriculture and Food Sciences
Depositing User:	Mr. Azman Mohamad
Date Deposited:	17 Dec 2024 02:45
Last Modified:	17 Dec 2024 02:45
URI:	http://psaspb.upm.edu.my/id/eprint/2278

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