Journal of Oil Palm Research Vol. 24  2012 August p.  1442-1447
DOI:

Effect of BT products, Lepcon-1, Bafog-1(s) and Ecobac-1(ec), against the oil palm pollinating weevil, elaeidobius kamerunucus, and beneficial insects associated with cassia cobanensis

Author(s): MOHD NAJIB Ahmad* ; SITI RAMLAH Ahmad Ali* ; MOHAMED MAZMIRA Mohd Masri* ; MOHD BASRI Wahid*

The effects of Bacillus thuringiensis products, Lepcon-1, Bafog-1 (S) and Ecobac-1 (EC), on the oil palm pollinating weevil, Elaeidobius kamerunicus, and beneficial insects, especially parasitoids, were studied. For pollinating weevils, oil palm male spikelets with weevils were treated by spraying with Lepcon-1 and Ecobac-1 (EC) at five different concentrations, ranging from 5.2 x 107 to 5.2 x 1011 cfu ml-1 for Lepcon-1, and 7.34 x 107 to 7.34 x 1011 cfu ml-1 for Ecobac-1 (EC). For Bafog-1 (S), male spikelets with weevils were fogged at a dose of 7.7 x 1011 cfu ml-1. The Bt products Lepcon-1, Bafog-1 (S) and Ecobac-1 (EC) were safe for E. kamerunicus. Direct spraying of Lepcon-1, Bafog-1 (S) and Ecobac-1 (EC) at the highest concentrations caused 13%, 10% and 11% corrected mortality at nine days after treatment (DAT), respectively. Cypermethrin was toxic to the pollinating weevils as it killed 100% of the weevils at as early as five DAT. Lepcon-1, Bafog-1 (S) and Ecobac-1 (EC) were also harmless to beneficial insects. Application of these products by spraying at the highest concentrations resulted in low mortality of the beneficial insects, ranging from 8% to 13%. Cypermethrin was toxic to the parasitoids as spraying of the chemical at 7.5% w/w killed 100% of the beneficial insects at as early as five DAT. The laboratory study showed that Lepcon-1, Bafog-1 (S) and Ecobac-1 (EC) were safe for the oil palm pollinating weevils and beneficial insects and, therefore, they are recommended for use in the integrated control of bagworms in oil palm.

Keywords: , , , , ,

Author Information
* Malaysian Palm Oil Board, P. O. Box 10620, 50720 Kuala Lumpur, Malaysia.
E-mail: najib@mpob.gov.my


Cited By

(7)
1, Ahmad, M. N., et al. "Safety Assessment of Bacillus Thuringiensis-Based Products using eye/ocular Irritation on Rabbits." Journal of Oil Palm Research, 28(1) (2016):10-15
2. Ahmad, M. N., et al. "Efficacy of Bafog-1 (S), Formulated Local Bacillus Thuringiensis for Controlling Bagworm, Pteroma Pendula (Lepidoptera: Psychidae)." Journal of Oil Palm Research, 25(APR) (2013):228-234
3. Ahmad, M. N., et al. "LEPCON-1, Bafog-1 (S) and Ecobac-1 (Ec), Bacillus Thuringiensis Based-Products are Not Toxic Against the Freshwater Fish, Tilapia Nilotica." Journal of Oil Palm Research, 26(4) (2014):317-320
4. Kamarudin, N., et al. "Controlling Metisa Plana Walker (Lepidoptera: Psychidae) Outbreak using Bacillus Thuringiensis at an Oil Palm Plantation in Slim River, Perak, Malaysia." Journal of Oil Palm Research, 29(1) (2017):47-54
5. Najib Ahmad, M., et al. "Effect of Bacillus Thuringiensis Based-Products on Rats." Journal of Oil Palm Research, 27(1) (2015):30-38
6. Prasetyo, A. E., W. O. Purba, and A. Susanto. "Elaeidobius Kamerunicus: Application of Hatch and Carry Technique for Increasing Oil Palm Fruit Set." Journal of Oil Palm Research, 26(3) (2014):195-202
7. Yue, J., et al. "Pollination Activity of Elaeidobius Kamerunicus (Coleoptera: Curculionoidea) on Oil Palm on Hainan Island." Florida Entomologist, Vol. 98, No. 2 (2015):499-505, doi:10.1653/024.098.0217.


Source: Scopus
Last updated: 24 May 2017

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