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• W41071213 abstract "The effectiveness of Bacillus thringiensis Berliner (Bt) against the bagworm, Metzsaplana Walker and its application using thermal fogger and mistblower was studied inthreeyear old oil palms.Initially, a standardized rearing protocol of the bagworm was established to producehealthy test insects. Met& plana was reared on oil palm seedlings fiom eggs surfacesterilizedfor one hour in 8% formaldehyde. This sterilization regime did not affect theegg hatchability and it significantly (P<0.05)in creased the survivorship of the first tosecond instar larvae when compared to larvae hatched from unsterilized eggs.Following a laboratory bioassay conducted against the third and fifth instar larvae attemperatures of 2529°C and 50-80% relative humudity, formulations from both Btsubsp. kurstaki: ~ i ~ eElS@, D ipel@D F, Dipel@W P and ABG-6429 FC; and Bt subsp.aizawai: FlorbacB SC and ~entar i@W G were shown to be effective on the bagworm.Evaluation on the suitability and effectiveness of portable thermal fogging (PulsFogQK10and AgroFoga AF 35) and mistblower (solo@ Master 412) application of Bt (DipelES@) against M. plana in three-year old oil palm revealed that when water was used asthe diluent in spray mixtures, efficacious activity was achieved which was attributedfrom the formation of an adequately stable emulsion. For both types of applicators, thekill of M. plana was shown to be positively dependent on droplet densities andconcentrations of Bt. In the field trial on three-year old oil palm, Agro~og@AF 35 withAFX Fogging Solution and solo@ Master 412 Knapsack Mistblower were shown togive effective horizontal throw of 6 m whereas P ~ ~ S FO~@w-KasI oOn ly 2 m. Under thecondition of these experiments, cost effectiveness analysis showed that the use ofportable fogger to apply Bt formulation to control M. plana was not as cost-effective,practical or suitable as knapsack mistblower. The predicted kill of the bagwormobtained by mistblower was satisfactory and higher (50-92%) compared to thermalfogger (38-46%) at the middle and top strata of the oil palm. The poor deposition ratesfrom fogging application in the palm increased the usage of ~ i ~ e ElS@ an d AFXFogging Solution thus incurred higher cost. Furthermore, the fogging application waslimited to early morning or late evening, and that also incurred higher labour cost, notwithstandingthe possibility of labour shortage. Comparatively, the use of mistblowergave higher deposition rates that reduced the rates of ~ i ~ eElS@ per hectare thus savedcost. Mistblower is also easily available, versatile and can be used during the daytime." @default.
• W41071213 created "2016-06-24" @default.
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• W41071213 date "2004-04-01" @default.
• W41071213 modified "2023-09-27" @default.
• W41071213 title "Efficacy of Bacillus Thuringiensis Berliner Against Metisa Plana Walker and its Application using Thermal Fogger and Mistblower" @default.
• W41071213 hasPublicationYear "2004" @default.
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