Browsing by Author "Orteza, Jay O."

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    Efficacy of neem (Azadirachia indica) leaves infusion and decoction against fly larvae
    (Don Mariano Marcos Memorial State University - North La Union Campus, 2009-03) Orteza, Jay O.
    This study was conducted to: (1) determine the efficacy of infused neem leaves against fly larvae; (2) determine the efficacy of decocted neem leaves against fly larvae; (3) determine the most effective concentration of infused neem leaves against fly larvae; (4) determine the most effective concentration of decocted neem leaves against fly larvae and (5) to compare the efficacy of neem leaf infusion from decoction. Larvae samples were collected and placed in culture basins with 40 larvae distributed in each treatment. After the application of treatments, larvae samples were closely observed daily for 13 days. Nine treatments replicated three times were used in the study. Treatments used were as follows: To1 (undisturbed); To'2 (water); To+ (commercial larvicidal); Ti infusion (60% concentration); T1 decoction (60% concentration); T2 infusion (80% concentration); T2 decoction (80% concentration); T3 infusion 100% concentration and T3 decoction(100% concentration). The result of the study showed that none of the different concentrations of either infused or decocted neem leaves were found to be effective against fly larvae. The result showed that Tl infusion (60% concentration) and T3 decoction (100% concentration) were found to have the highest percentage reduction among the treatments but were not considered as effective concentration because both were not able to reduce the number of larvae to the acceptable level. Although the neem leaves infusion and decoction were all considered ineffective based from the standard criteria, both have potential larvicidal effect because they were able to reduce the larval count. Likewise, the efficacy of neem leaf infusion was not significantly different from the efficacy of decoction.
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    Types of rearing system and kinds of litter material for broilers
    (Don Mariano Marcos Memorial State University- North La Union Campus, 2023-05) Orteza, Jay O.
    ORTEZA, JAY OCASION. (2023). Types of Rearing System and Kinds of Litter Material for Broilers. Master of Science in Animal Science. Don Mariano Marcos Memorial State University, North La Union Campus, College of Graduate Studies, Bacnotan, La Union. Adviser: Libunao, Lydia P., Ph.D. This study was conducted to determine the effects of different types of rearing system, i.e. elevated and non-elevated and evaluate the quality of some locally available litter material (river sand, CRH and wood shavings) on the productive performance of broiler. The study was conducted from November 2021 to December 2021. A total of 90 day-old chicks were assigned to each treatment following the Strip Plot Design with three replications. Result of the study disclosed that different types of rearing system and different types of litter material has no significant influence on the performance of broiler. However, on the interaction of rearing system by kinds of litter materials disclosed significant results on feed consumption and head weight.