Volume 9 No. 4 October – December 1987

Alfredo G. Dingal, Nestor L. Pido and Daniel G. Ecleo ABSTRACT Sett type of tugui [Dioscorea esculenta (Lour) Burk.] could be arranged in order of increasing mortality and decreasing yield as follows: wholes, heads, tails and middles. Whole setts and middle setts had the highest and the lowest percentage emergence, respectively. The inability of some …

Note: Effect of Sett Type on the Performance of Tugui [Dioscorea esculenta (Lour) Burk.] Read More »

A.P. Bangi, E.D Bello and G. Bramhall ABSTRACT Three models based on Bramhall’s drying-effort method for calculating kiln-schedule modifications were developed to determine the reliability of the method to the kiln drying of some Philippine hardwood lumber species. The general form of the models is based on Bramhall’s vapor-pressure gradient concept of bound-water diffusion, and …

Mathematical Models for Predicting Kiln-Drying Time and Modifying Kiln Schedules for Some Philippin Hardwoord Species Read More »

Crisanta E. Sajise ABSTRACT The effects of storage temperature, moisture, packaging material and duration of exposure to inoculum on the development and severity of Fusarium rot on tomato fruits were investigated. Apparent infection rate and disease severity values were significantly higher at room temperature (27.5°C). However, disease development was completely inhibited at 10°C but most …

Factors Affecting the Rate of Fusarium Rot Development in Harvested Tomato Fruits Read More »

Erlinda A. Vasquez, Emiliana N. Bernardo and Lorenza B. de Pedro ABSTRACT The two species of coccinellid predators (Chilomenes sexmaculata Fabr. and Coleophora inaequalis Fabr.) treated with decamethrin and permethrin showed slightly longer total developmental period, higher mortality rate and lower fecundity rate than the untreated ones, particularly C. inaequalis. No significant differences were found …

Effects of Decamethrin and Permethrin on the Biology of Two Coccinelid Predatos of Black Bean Aphids Read More »

Edgardo E. Tulin and Emma S. Data ABSTRACT Delayed processing significantly affected the starch and total sugar contents of cassava and sweet potato roots. However, these is no apparent trend to show the relationship between delayed processing and starch or sugar content of the roots. Alcohol production was significantly influenced by late processing in sweet …

Effect of Delayed Processing on Alcohol Yield of Fresh Root Crops Read More »

Federico G. Villamayor, Jr. and Veronica L. Reoma ABSTRACT Two experiments were conducted to determine the effect of land preparation and postplanting tillage on weed control and cassava yield. The first experiment showed that weed biomass and cassava yield were not affected by the method of land preparation. Postplanting tillage, however, significantly affected weed biomass …

Effects of Land Preparation and Postplanting Tillage on Weed Control and Cassava Yield Read More »