Journal of Oil Palm Research Vol. 29  March 2017 p.  47-54
DOI:

CONTROLLING Metisa plana Walker (Lepidoptera: Psychidae) OUTBREAK USING Bacillus thuringiensis AT AN OIL PALM PLANTATION IN SLIM RIVER, PERAK, MALAYSIA

Author(s): NOORHAZWANI KAMARUDIN*; SITI RAMLAH AHMAD ALI*; MOHAMED MAZMIRA MOHD MASRI; MOHD NAJIB AHMAD*; CHE AHMAD HAFIZ CHE MANAN* and NORMAN KAMARUDIN*

Aer­ial spray­ing of Bacil­lus thuringien­sis (Bt)-based biopes­ti­cides, Ecobac-1 (EC) was car­ried out at an oil palm plan­ta­tion in Slim River, Perak, Malaysia to con­trol the out­break of bag­worm, Metisa plana. Close mon­i­tor­ing of bag­worm cen­sus, pre­cise tim­ing and follow-up aer­ial spray­ing of Ecobac-1 (EC) were impor­tant strate­gies for con­trol­ling the multi-stage bag­worm out­break. The first aer­ial spray­ing of Ecobac-1 (EC) which was con­ducted on 11 Octo­ber 2013 had suc­cess­fully reduced the first gen­er­a­tion lar­vae pop­u­la­tion from 187.1 lar­vae per frond (LPF) eight days prior to treat­ment to 77.6 LPF at 14 days after treat­ment (DAT), indi­cat­ing 56.0% reduc­tion in bag­worm pop­u­la­tion. The sec­ond aer­ial spray­ing of Ecobac-1 (EC) under­taken on 19 Decem­ber 2013, had reduced the sec­ond gen­er­a­tion lar­vae pop­u­la­tion from 358.7 LPF a day prior to treat­ment to 105.2 LPF at 14 DAT, which resulted in 70.7% reduc­tion in bag­worm pop­u­la­tion. Whilst the third aer­ial spray­ing done on 7 March 2014 had fur­ther reduced the pop­u­la­tion from 51.3 LPF three days prior to treat­ment to 17.2 LPF at 14 DAT, indi­cated a 66.4% reduc­tion. The three con­sec­u­tive aer­ial spray­ing of Ecobac-1 (EC) to con­trol the three gen­er­a­tions of M. plana at an oil palm plan­ta­tion in Slim River, Perak suc­cess­fully reduced the over­all bag­worm pop­u­la­tion by 90.8%. There­fore, it is rec­om­mended for the man­age­ment to con­duct a con­stant vig­i­lance and cen­sus for suc­ces­sive con­trol of bag­worm pop­u­la­tion below the eco­nomic thresh­old level.

Keywords: , , , ,

Author Information
* Malaysian Palm Oil Board, 6 Persiaran Institusi, Bandar Baru Bangi, 43000 Kajang, Selangor, Malaysia. E-mail:


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