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Powdered bard of Dallak Tree (Ormosia calavensis azaola) againsts Giant Earthworms as Soil conservation measure

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dc.contributor.authorEbbes, Jennifer Jean S.
dc.contributor.authorMangili, Levy Jane T.
dc.date.accessioned2026-05-07T06:04:35Z
dc.date.available2026-05-07T06:04:35Z
dc.date.issued2009-03
dc.description.abstractThe study was conducted to determine the efficacy of powdered bark of dallak againsts giant earthworms as compared to the semi-dried bark of dallak. The study also includes the analysis of the semi-dried and powdered bark of dallak and to determine the phytochemical constituent present on those two samples that killed the giant earthworms. Identification of the tree was also included in the study. The study was held at the Crop Processing Center of the Agricultural Engineering Department, DMMMSU-NLUC, Bacnotan, La Union, from November 16, 2008 to February 27, 2009.The treatments used were as follows:T₁ – TraditionalT₂ – Powdered bark of dallak with soilT₃ – Powdered bark of dallak without soilComplete Randomized Design (CRD) was used in determining the difference in the effect of powdered bark of dallak and traditional application of semi-dried bark of dallak on the control of giant earthworms.Based on the result of the study, there was a significant difference on the effect of semi-dried bark of dallak used traditionally from that of powdered bark. Both T₂ and T₃ attained the highest mortality rate with a mean of 100 % after two hours, while the lowest mortality rate was obtained at T₁, with a mean of 76.67 after three hours. Based on the result of the study, the powdered bark of dallak used in T₂ and T₃ is more efficient in terms of length of time compared to the semi-dried bark of dallak used traditionally. It was also observed that the powdered and semi-dried bark of dallak have the same chemical contents. However, it was observed that when the semi-dried bark was powderized, the tannins, steroids, and cyanogenic glycosides contents vanished. And these contents were known to have very minimal toxicity and perhaps even contributed to the survival of the earthworms.
dc.identifier.citation[Unpublished Undergraduate Thesis Don Mariano Marcos Memorial State University - North La Union Campus, Sapilang, Bacnotan, La Union]. Lakasa ti Sirib, DMMMSU Institutional Repository.
dc.identifier.urihttps://lakasa.dmmmsu.edu.ph/handle/123456789/1525
dc.language.isoen_US
dc.publisherDon Mariano Marcos Memorial State University - North La Union Campus
dc.sdgSDG 15
dc.titlePowdered bard of Dallak Tree (Ormosia calavensis azaola) againsts Giant Earthworms as Soil conservation measure
dc.typeThesis
dspace.entity.typePublication
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