Recherche
Voici les éléments 11-20 de 23
On-farm evaluation of pepper grafting technology for managing soil-borne diseases of sweet peppers during hot-wet season in highland tropics
(International Society for Horticultural Science, 2012-08-31)
A major constraint limiting yield and production of sweet pepper (Capsicum annuum) during the hot-wet season in the highland tropics is the high incidence of soil-borne diseases including bacterial wilt-BW (Ralstonia solanacearum) and Phytophthora blight-PB (Phytophthora capsici). High temperature and humidity during the wet season favor development of these soil pathogens. A technology on grafting sweet pepper scion onto chili pepper rootstock with resistance to both diseases and flooding was developed at AVRDC – The World Vegetable Center since 2002. Several chili pepper lines were identified with high resistance to BW and PB. From 2007 to 2008, on-farm trials were conducted in Nantou, Central Taiwan to evaluate disease resistance and subsequent yield of sweet pepper cultivars grafted onto resistant chili pepper rootstocks. In both years, the incidence of PB and BW was significantly (P<0.05) lower in grafted than non-grafted plants. Marketable fruit yields averaged over four sweet pepper cultivars (scions) were significantly (P<0.05) greater in plants grafted onto seven chili rootstock lines compared to non-grafted plants. Outstanding and high yielding sweet pepper cultivars were ‘Andalus’ and ‘Hazera’. Six outstanding chili pepper rootstock lines with low incidence of BW and PB were identified in these trials. This study indicates that grafting technology is effective in reducing soil-borne diseases of sweet pepper which leads to increased yield and production during the hot-wet season in tropical highlands....
Technical performance of developed appropriate technologies: Its utilization as an approach for sustainable Philippine agricultural mechanization
(Association of Agricultural Technology in Southeast Asia (AATSEA), 2022-07)
The study related to the technical performance of the different appropriate technologies developed in Iloilo City, Philippines to introduce the agriculture sector machinery and equipment access and solutions towards ...
Results of a value adding test to produce alternative fuels and raw materials (AFR) for industrial purposes and for household energy supply with appropriate technology
(2009-10)
The application of “Waste-to-Energy” is hardly practiced in developing countries. However, a utilization as “Alternative Fuels and Raw materials” (AFR), for instance in cement kilns or for household energy supply (e.g. for ...
Environmental effects on the resistance of rice seedlings to complete submergence
(Crop Science Society of America (CSSA), 1972-03-01)
The survival of rice seedlings (Oryza sativa L.) after complete Submergence in water decreased with increased duration of submergence; with increased depth, temperature, and turbidity of water; and with increased rates of N fertilization. Survival increased with high light intensity and plant carbohydrate content. Factors that influence the survival of submerged plants also determine the amounts of N and carbohydrate in the plant....
Horticultural characterization of AVRDC moringa germplasm in the Philippines and Taiwan
(International Society for Horticultural Science, 2015-12-06)
The major objective of this study was to evaluate a subset of the AVRDC Moringa oleifera germplasm collection for important horticultural traits in the Philippines and Taiwan. The 18 AVRDC moringa accessions originated from India, Laos, Philippines, Taiwan, Tanzania, Thailand and USA. Three-month-old seedlings were transplanted onto single-row raised beds spaced 1.5 m apart. Plants were arranged in a randomized block design with three replications. Data were collected on plant height, stem diameter, number of branches, canopy width, fresh and dry biomass (stems and leaves), days to flowering, and pod/seed yield. In Taiwan, one month after transplanting four accessions attained a plant height of above 1 m. Number of side branches ranged from 9 to 14 per plant. Differences in plant height and stem diameter were significant at 70 days after transplanting (DAT). Tallest plants (2.9 m) were observed in LSQUOMo-35RSQUO from Tanzania while LSQUOMo-8RSQUO from Thailand produced the largest stem diameter (36 cm). Leaf fresh weight and dry biomass was highest (15.8 and 9.2 t ha<sup>-1</sup>, respectively) for LSQUOMo-35RSQUO at 70 DAT. Survival and stand count decreased after two strong typhoons and severe flooding in 2009 and 2010. In the Philippines, accessions LSQUOMo-2RSQUO (USA) and LSQUOMo-40RSQUO (India) produced the tallest plants 28 weeks after second pruning. Mean stem diameter ranged from 3.5 cm (LSQUOMo-34RSQUO) to 8.5 cm (LSQUOMo-4RSQUO). LSQUOMo-38RSQUO (Thailand) produced the highest number of branches. Two accessions from Thailand (LSQUOMo-4RSQUO and LSQUOMo-14RSQUO) resulted in the highest leaf fresh weight, which exceeded 20 t ha<sup>-1</sup> from two prunings, while LSQUOMo-29RSQUO (India) produced the highest dry leaf biomass. Most accessions tolerated waterlogged conditions with 60-100% plant survival stand count. The results indicate that there are moringa accessions with promising horticultural traits for the high rainfall climate of Southeast Asia....
Assessing technology and socioeconomic constraints and prospects of low-cost drip irrigation for vegetable farming in Southeast Asia
(AVRDC – The World Vegetable Center, 2013)
Farmers’ enthusiasm in using low-cost drip irrigation as seen at many on-farm research and demonstration sites across Southeast Asia clearly indicates a high potential of the technology to smallholding vegetable growers. ...
Adaptability and horticultural characterization of Moringa accessions under Central Philippines conditions
(AVRDC – The World Vegetable Center, 2013)
This study was conducted to determine the adaptability and describe the horticultural characteristics of Moringa oleifera Lam. accessions under central Philippines conditions. Eighteen Moringa accessions obtained from AVRDC – The World Vegetable Center were evaluated in observational trials at Central Philippine University, Iloilo City, Philippines in 2009. The accessions originated from India (3), Laos (1), Philippines (1), Taiwan (1), Tanzania (1), Thailand (10), and USA (1). Three-month-old seedlings were transplanted in nonreplicated plots at a spacing of 2 m between rows and 1.5 m between plants. Data were recorded on growth and stand survival, plant height, stem diameter, number of branches, fresh leaf yield, pod and seed production, and incidence of insect pests and diseases. Percentage seed germination ranged from 40 to 100%, with eight accessions having 100% and eight accessions 80% germination. Two accessions from Thailand had poor germination (40%). All seeds that germinated developed into healthy seedlings with 80 to 100% survival. At 28 weeks after second pruning, accessions Mo-2 (USA) and Mo-40 (India) produced the tallest plants (5.6 and 5.1 m, respectively), whereas Mo-34 (India) produced the shortest plants (2.9 m). Mean stem diameter ranged from 3.5 cm (Mo-34) to 8.5 cm (Mo4-Thailand). Mo-38 (Thailand) produced the highest number of branches (5.3), whereas Mo-33 (Philippines) showed the lowest number of branches (2.0) per plant. Two accessions from Thailand resulted in the highest leaf fresh weight, which exceeded 2 kg/plant from two prunings. Eight accessions produced leaf fresh biomass that exceeded 1 kg/plant. Mo-3 (Taiwan) developed the highest number of pods, whereas Mo-34 produced the highest number of seeds. Red mites (Tetranychus urticae), Coccinellid beetles (Coccinellidae), leaf-footed bug (Leptoglossus phyllopus) and whiteflies (Bemisia sp.) were present, but caused only minor damage to plants. Stem rot was the only disease observed in a few plants....
Performance of vegetable soybean cultivars under organic crop management system
(AVRDC – The World Vegetable Center, 2013)
The objective of this study was to evaluate growth and yield performance of vegetable soybean (Glycine max) cultivars under organic crop management practices. Four cultivars: Kaohsiung No. 6 (KS 6), Kaohsiung No. 9 (KS 9), Tainan ASVEG No. 2 (TNAV 2), and Japan aromatic flavor variety Cha-mame were grown in spring and fall seasons in organic experimental farm at AVRDC – The World Vegetable Center in 2006-2007. Organic crop management practices consisted of rhizobium seed inoculation, application of balanced solid and liquid organic fertilizer, integrated pest management involving sex pheromone, yellow and blue sticky paper traps, and bio-pesticide sprays (Neem and Bt); and bio-agents (Trichoderma spp., Bacillus subtilis and. Streptomyces spp. for fungal disease management. Yield performance showed that TNAV 2 produced the highest total pod yield, followed by KS 9 and Cha-mame. However, differences were not significant. TNAV 2 matured late whereas Cha-mame matured early. Over three growing seasons, Cha-mame produced the highest graded pod yield, followed by TNAV 2 and KS 9. This study indicates that both vegetable soybean cultivars Cha-mame and TNAV 2 have greater yield potential than other cultivars when produced under organic farming system....
Testing of briquette production for household use by informal waste workers at the Calajunan dumpsite in Iloilo City, Philippines
(2011)
Three recommended mixtures for briquette production were tested by eight identified informal waste workers within a 10-day briquette production test at the Calajunan dumpsite in Iloilo City, Philippines. The test revealed ...
How to promote a job change of dumpsite waste pickers? Evidence from a field experiment in the Philippines
(2014-05)
Switching a waste disposal policy from open dumping to sanitary landfilling requires a job change of waste pickers. We conducted a field experiment at Iloilo in the Philippines which offers dumpsite waste pickers a new job ...