Vol. 104, No. 3 (Sep 2021)
Pummelo, “pomelo” or “shaddock”, is a popular citrus variety widely grown and consumed in the country and has grown as an essential commodity in international markets. In this paper, Thrips hawaiiensis (Morgan) was the only species of thrips infesting “Magallanes” Pummelo (Citrus maxima Burm.). Significantly high population of Thrips hawaiiensis at the peak of flowering stage and fluctuated at petal and fruit developmental stages. Flowers including terminal shoots provided stable food sources for T. hawaiiensis. (https://doi.org/10.62550/RI21091043)
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Articles
Will patients benefit from the current Philippine Legislative Bill on Medical Cannabis? A Cost-Benefit Analysis
Godofreda V. Dalmacion, Paul Joseph B. Ramirez, Zypher Jude G. Regencia, and Emmanuel S. Baja
Received: July 09, 2020/ Revised: May 04, 2021/ Accepted: June 25, 2021 (https://doi.org/10.62550/CAB05023020)
The Philippine Congress is pushing House Bill (HB) 6517 to decriminalize medical cannabis use in the Philippines. This study aims to evaluate the cost and benefit that will likely result from the legalization of medical cannabis. Focus group discussions, key informant interviews, and review of secondary data were done with stakeholders to validate and localize the benefits and costs associated with the legalization of medical cannabis versus the current status quo. Cost-benefit analysis (CBA) was based on the requirements of HB 6517. Only direct effects on major stakeholders were covered in the final CBA. Results were expressed as Net Present Value (NPV) to society. Medical cannabis legal...
The Philippine Congress is pushing House Bill (HB) 6517 to decriminalize medical cannabis use in the Philippines. This study aims to evaluate the cost and benefit that will likely result from the legalization of medical cannabis. Focus group discussions, key informant interviews, and review of secondary data were done with stakeholders to validate and localize the benefits and costs associated with the legalization of medical cannabis versus the current status quo. Cost-benefit analysis (CBA)...
Genetic Diversity and Population Structure of Sugarcane (Saccharum officinarum L.) Collected from Seven Philippine Regions for Use as Breeding Stocks for Crop Improvement
Jan Leandro L. Acedera, Jhun Laurence S. Rasco, Jemimah C. Banganan, and Antonio G. Lalusin
Received: January 06, 2021/ Revised: May 26, 2021/ Accepted: August 08, 2021 (https://doi.org/10.62550/AZ06002021)
Selection of parents for hybridization relies on the information on their genetic relationship and diversity which are essential in any breeding program. This study aimed to estimate the extent of genetic diversity and population structure of 76 sugarcane accessions from seven regions in the Philippines using 57 morphological characters and 50 microsatellite markers. The sugarcane collections exhibited moderate to high diversity with mean of H’ = 0.72 for qualitative and H’ = 0.75 for quantitative morphological characters, respectively. This is corroborated by the analysis of variance (ANOVA) of agronomic parameters, except for stalk length. Unweighted Pair Group Method with Arithmetic Me...
Selection of parents for hybridization relies on the information on their genetic relationship and diversity which are essential in any breeding program. This study aimed to estimate the extent of genetic diversity and population structure of 76 sugarcane accessions from seven regions in the Philippines using 57 morphological characters and 50 microsatellite markers. The sugarcane collections exhibited moderate to high diversity with mean of H’ = 0.72 for qualitative and H’ = 0.75 for quantit...
Identity and Population Density of Thrips hawaiiensis (Insecta: Thysanoptera) in Conventional “Magallanes” Pummelo Orchard in Carmen, Davao del Norte, Philippines
Roderick M. Granada, Flor A. Ceballo, and Pio A. Javier
Received: August 22, 2019/ Revised: August 20, 2021/ Accepted: August 26, 2021 (https://doi.org/10.62550/HJ22098019)
A conventional “Magallanes” Pummelo orchard in Brgy. Minda, Carmen, Davao del Norte, Philippines was selected to assess thrips species composition, population density, and associated natural enemies. The insecticide treated pummelo orchard was situated adjacent to vast Cavendish banana plantations. Thrips were collected weekly from September 2017 to July 2018 from five different randomly selected flowering pummelo trees by destructive sampling and yellow sticky trap methods. Thrips were sorted and examined under the microscope. Findings of the study showed that Thrips hawaiiensis (Morgan), (Thripidae: Thripinae) was the only species of thrips infesting “Magallanes” pummelo. This constitut...
A conventional “Magallanes” Pummelo orchard in Brgy. Minda, Carmen, Davao del Norte, Philippines was selected to assess thrips species composition, population density, and associated natural enemies. The insecticide treated pummelo orchard was situated adjacent to vast Cavendish banana plantations. Thrips were collected weekly from September 2017 to July 2018 from five different randomly selected flowering pummelo trees by destructive sampling and yellow sticky trap methods. Thrips were sorte...
Efficacy Study of Selected Maize (Zea mays L.) Genotypes Against the Asian Corn Borer, Ostrinia furnacalis (Guenée)
Yoryncita C. Marfori, Merdelyn T. Caasi-Lit, and Tonette P. Laude
Received: March 11, 2020/ Revised: February 24, 2021/ Accepted: July 15, 2021 (https://doi.org/10.62550/CU11024020)
Laboratory and screen house studies were conducted to assess the efficacy of selected twenty-six maize varieties against Asian corn borer (ACB), Ostrinia furnacalis (Guenée). Hierarchical tree based on resistance parameters clearly revealed that the twenty-six maize varieties are best classified into three groups, viz. resistant, intermediate, and susceptible. In laboratory test, the varieties RCS2, RCS4, RCS5, 'IPB Var13', Bt2, Bt3, and Bt4 were consistently identified as highly resistant. Further examinations in stalk feeding assay showed that the resistant varieties had sharp decline in larval survival (LS) on the 2nd to the 5th day of larval feeding in stalk tissue. On the other hand,...
Laboratory and screen house studies were conducted to assess the efficacy of selected twenty-six maize varieties against Asian corn borer (ACB), Ostrinia furnacalis (Guenée). Hierarchical tree based on resistance parameters clearly revealed that the twenty-six maize varieties are best classified into three groups, viz. resistant, intermediate, and susceptible. In laboratory test, the varieties RCS2, RCS4, RCS5, 'IPB Var13', Bt2, Bt3, and Bt4 were consistently identified as highly resistant. F...
Optimization of Ethanol Production from Enzymatically Saccharified Biomass of Acid-Pretreated Rice Straw
Muzammal Mateen Azhar, Qurban Ali, Arif Malik, Elham Khalili, Muhammad Arshad Javed, and Muhammad Saleem Haidar
Received: January 10, 2021/ Revised: June 01, 2021/ Accepted: August 05, 2021 (https://doi.org/10.62550/AV10004020)
The substrate of rice (Oryza sativa) straw employed in this study was procured from local market and stored in polyethene bags until needed. The study was conducted to find out the effects of process optimization of ethanol production from enzymatically saccharified biomass of acid-pretreated rice straw. The results indicated that acid pretreatment has reduced lignin content about 50%. Resultantly, pretreatment raised cellulose contents up to 52% making it suitable for enzymatic saccharification. Optimization of saccharification illustrated that parameters such as biomass, enzyme concentration, temperature, incubation time and agitation indeed affected the action of cellulase on pretreate...
The substrate of rice (Oryza sativa) straw employed in this study was procured from local market and stored in polyethene bags until needed. The study was conducted to find out the effects of process optimization of ethanol production from enzymatically saccharified biomass of acid-pretreated rice straw. The results indicated that acid pretreatment has reduced lignin content about 50%. Resultantly, pretreatment raised cellulose contents up to 52% making it suitable for enzymatic saccharificat...
