Jose R. Pardales, Jr. ABSTRACT The factors which limited fruit and seed development in taro were determined through laboratory and field observations in the flowers of 18 selected cultivars from the taro germplasm in the Philippine Root Crop Research and Training Center in ViSCA, Baybay, Leyte. The limited fruit and seed set in some taro …
Alfredo B. Escasinas and Rodolfo G. Escalade ABSTRACT Differences in grain yield between the different methods of weed control were not statistically significant; however, highly significant differences were observed on the timing of weed control. Results showed that early application of weed control treatments resulted in increased grain and stover yields. Clean culture and application …
Ofelia I. Dedal, M.K. Palomarand C.M. Napiere ABSTRACT Xanthomonas manihotis Starr infected four species of euphorbiaceous plants, namely: Manihot glaziovii Muell.- Arg., Manihot esculenta Crantz (variegated ornamental cassava), Euphorbia puicherrima Willd., and Pedilanthus tithymaloides (L.) Poit. The diagnostic character of the disease on the alternate hosts was similar to that on cassava which served as …
Nelson M. Esguerra and Frank H. Haramoto ABSTRACT Distribution pattern and population fluctuation of the carmine spider mite and its predators were studied in unsprayed Solo papaya trees grown at the Kauai Branch Experiment Station of the University of Hawaii, at Kapaa from 1978 to 1979. In the field, the carmine spider mites were found …
Distribution and Population of Papaya Carmine Spider Mites and Their Predators Read More »
C. M. Napiere ABSTRACT Development of bacterial wilt was consistently earlier on plants inoculated with both bacterium (Pseudomonas solanacearum E.F. Smith) and nematode Meloidogyne incognita Chitwood) compared to those inoculated with the bacterium alone. The percentage mortality also increased with increasing nematode population in the bacterium-infested soil. The presence of M. incognita enhanced the development …
Varying lnoculum Levels of Bacteria-Nematodes and the Severity of Tomato Bacterial Wilt Read More »
Leonila A. Urdaneta and Reynaldo R. Javier ABSTRACT Nitrogen application, either with the use of ammonium sulfate or ipil-ipil leaves, significantly improved the yield and yield components of the three varieties of sweet potato. except in the number of non-marketable tubers. Among the varieties tested, BNAS-51 yielded the highest amount of marketable tubers with an …
Effects of Ipil-lpil and Ammonium Sulfate As Nitrogen Sources of Sweet Potato Read More »
M. K. Palomar, A. D. Solis and H. S. Bandala ABSTRACT Tuber rot or Java black rot, caused by Diplodia theobromae (Pat.) Nowell is the most prevalent storage disease of sweet potato. Affected tubers become dry, hard and coal-black in color. Isolations made from stored sweet potato revealed a high incidence (69%) of D. theobromae …
Sweet Potato Tuber Rot Disease in the Philippines Read More »
R. B. Capuno, B. E. Fabre and R. G. Escalade ABSTRACT Green manure increased the organic matter content of the soil. Soybeans, as green manure, provided the highest organic matter content (3.796%), followed by mungbean (3.268%) and bushbean (2.836%). The plot without green manure had the lowest organic matter content of 1.740%. The nutrients from …
Nelson M. Esguerra and Patrick R. Jackson ABSTRACT Arthropod populations and their structure in soil and litter at three elevations were studied at Wahila Ridge, Hawaii. Berlese funnel was used to extract the fauna from soil and litter samples. More species and higher population of arthropods were recovered in stream soil and litter than in …
Structure and Diversity of Arthropods at Wahila Ridge, Hawaii Read More »
Eufemia A. Almaden and Rebecco M. Santiago ABSTRACT Significant variations in the effects of spacing were observed on the vegetative growth and overall vigor of coconut seedlings in the nursery. Plants grown at a distance of 40 cm and farther (60 and 80 cm) had bigger girth diameter, more split leaves, and greater vigor index …
Response of Coconut Seedlings to Spacing and Application of Nitrogen and Potassium Read More »