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Relationship Between Morphological Characteristics and Varietal Resistance of Sweet Potato to Scab Infection Caused by Sphaceloma batatas Saw

Volume 9 No. 2 April – June 1987 / By

Gracia B. Bajit and Ruben M. Gapasin ABSTRACT The morphological characteristics of sweet potato cultivars which are resistant and susceptible to Sphaceloma batatas Saw. were determined. Susceptible cultivars have thinner cuticle, more stomates in the leaves, and more lenticles in the petioles and stems than resistant cultivars. The scab pathogen had longer incubation period, lower …

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Relationship Between Taro Feathery Mosaic Disease and Its Insect Vector, Tarophagus Proserpina Kirk

Volume 9 No. 2 April – June 1987 / By

Manuel K. Palomar ABSTRACT Adults and nymphs of the taro planthopper, Tarophagus Proserpina Kirk., were equally efficient in transmitting taro feathery mosaic disease. Both the minimum acquisition feeding period and minimum inoculation feeding period were about 5 min. A single insect could induce the disease in a healthy plant and percentage infection increased as the …

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Biology, Host Range and Natural Enemies of the Coconut Spider Mite, Oligonychus velascoi Rimando

Volume 9 No. 2 April – June 1987 / By

Tita L. Cayme and Dely P. Gapasin ABSTRACT The total developmental period of the coconut spider mite, Oligonychus velascoi Rimando was 6.3 and 6.9 days for those reared on detached and undetached leaflets, respectively. The slight difference observed in the life cycle of mites using the two rearing methods indicates that both techniques are satisfactory …

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Heavy metal tolerance of filamentous fungi from the sediments of Visayas State University wastewater pond

Volume 43 No. 1 January - June 2021 / By

Richie Mar M. Eliseo and Jayzon G. Bitacura ABSTRACT The ability to tolerate high concentrations of heavy metals is one important characteristic of organisms that can be used for bioremediation. In this study, the heavy metal tolerance of filamentous fungi isolated from the VSU wastewater settlement pond was investigated. Specifically, the research was done to …

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Consumption of Secondary Food Crops by Low-and High-Income Households

Volume 9 No. 1 January – March 1987 / By

Jose M. Alkuino, Jr. ABSTRACT The study attempted to identify the kinds of secondary food crops consumed by households when the normally consumed staple food is scarce or when such households experience an income squeeze. One thousand two hundred households in the Visayas region were included in the survey. The respondents were divided into high- …

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Comparative Composition, Abundance and Dominants of Meiofauna Between a Muddy and a Sandy Substrate in Silut Bay, Cental Philippines

Volume 9 No. 1 January – March 1987 / By

Bernardita C. Pilapil ABSTRACT The tropical meiofauna communities of a muddy and a sandy portion in Shut Bay, Liloan, Central Philippines were compared. The sandy substrate supports a more varied meiofauna community than the muddy substrate although faunal composition between the two substrate types differs only slightly. Ten meiofauna groups (Copepoda, Bivalvia, Nematoda, Gastrotricha, Ostracoda, …

Comparative Composition, Abundance and Dominants of Meiofauna Between a Muddy and a Sandy Substrate in Silut Bay, Cental Philippines Read More »

Effects of Lime on the Growth and Yield of Corn in Maasin City

Volume 9 No. 1 January – March 1987 / By

G. L. Amora , R. G. Escalada and B. F. Quirol ABSTRACT Lime application did not affect the period from planting to seedling emergence, tasseling, and maturity; number of leaves at tasseling; plant height at maturity; and the number and weight of ears per plant and weight of 1000 grains. However, application of 3.3, 11.6 …

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Infectivity and in vitro Production of Sweet Potato Scab Fungus (Sphaceloma batatas Saw.) Inoculum

Volume 9 No. 1 January – March 1987 / By

Rodolfo A. Paningbatan ABSTRACT Sweet potato stem agar and exposure to continuous darkness supported the most abundant conidial production of Sphaceloma batatas. Saw. Sweet potato stem agar produced 19 times more conidia than sweet potato tuber agar and almost 3 times more conidia than potato dextrose agar. Sporulation in carrot agar peaked at 12-15 days …

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Handling of Coconut Water and Clarification of Coco-Vinegar for Small-Scale Production

Volume 9 No. 1 January – March 1987 / By

Truong Van Den and Melimer E. Marquez ABSTRACT The study aimed to develop an appropriate small-scale technique of producing sparkling clear vinegar from coconut water. Results indicate that (1) at least 8% w/v alcohol solution is required to produce the standard vinegar with 4% w/v acetic acid by the traditional method, and (2) the alcohol …

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Synthesis of Ethyl Fatty Alkyl Ethers from Coconut (Cocos nucifera L.) Fatty Alcohols

Volume 9 No. 1 January – March 1987 / By

Alice R. M. Acabal and William G. Padolina ABSTRACT Ethyl fatty alkyl ethers were synthesized using coconut fatty alcohols as the starting raw materials. The fatty alcohols were converted into their corresponding bromides which were then made to react with ethanolic potassium hydroxide. The average percent yield of ethyl fatty alkyl ethers was 74.30%. The …

Synthesis of Ethyl Fatty Alkyl Ethers from Coconut (Cocos nucifera L.) Fatty Alcohols Read More »

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