Evaluation Of Several Chemical Control Approaches Against Bagworm, Metisa Plana Walker (Lepidoptera: Psychidae) In Felda Oil Palm Plantations

Simple item page
dc.contributor.authorSalim, Hasber
dc.date.accessioned2018-06-06T07:44:22Z
dc.date.available2018-06-06T07:44:22Z
dc.date.issued2010-04
dc.description.abstractIn oil palm plantations chemical control is still the principal means of reducing pest numbers when their population levels are high. In this study, a series of field trials investigating the efficacy of several application techniques for insecticides against bagworm, Metisa plana, were carried out in oil palm plantations. The efficacy of the ground spraying technique for four insecticides (trichorfon, lambda cyahothrin, cypermethrin EC and cypermethrin EW) as well as a bio insecticide, Bacillus thuringiensis (Bt), was investigated upon 5 year-old palms in FELDA Besout 06. In general, each insecticide provided satisfactory control against M. plana, and pest populations were reduced to below the economic threshold level (< 5 larvae/frond). Cypermethrin was the most effective treatment, whereas bio insecticide treatment was the least effective. While ground spraying was effective against M. plana in this study, this technique was not suitable for controlling a large-scale bagworm outbreaks due to its low productivity and small area coverage. As an alternative, the bio insecticide, Bacillus thringiensis subspecies kurstaki (Btk), was applied by using an aerial spraying technique and its efficacy assessed. Three dosages (1 L/ha, 2 L/ha and 3 L/ha) of commercially formulated Btk were tested in areas of high M. plana infestation in FELDA Besout 02. However, the treatment was not as effective as the chemical insecticides (P > 0.05), even at the highest dosage. Further efficacy assessments were carried out using a trunk injection technique for systemic insecticides methamidophos and monocrotophos, in mature palms in FELDA Besout 06. The results showed that both insecticides were highly effective (P<0.05) against M. plana, with the pest populations eradicated following a single application. No significant difference in effectiveness of methamidophos and monocrotophos was detected at P = 0.05. The results also showed that M. plana populations were susceptible to these insecticides with no increase of previously used dosages, indicating that although they have been used in the field for a long time, the pests have not developed resistance to them. The trunk injection technique has proven to be the most suitable technique to control large-scale bagworm outbreaks in mature oil palm plantations.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/5691
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectThe efficacy of several application techniquesen_US
dc.subjectfor insecticides against bagwormen_US
dc.titleEvaluation Of Several Chemical Control Approaches Against Bagworm, Metisa Plana Walker (Lepidoptera: Psychidae) In Felda Oil Palm Plantationsen_US
dc.typeThesisen_US
Files
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Pusat Pengajian Sains Kajihayat - Tesis