The Tarlac College of Agriculture is a public state college in the Philippines. It is mandated to provide professional, technical and instruction for special purposes and to promote research extension services and progressive leadership in agriculture, agricultural education, home technology and other related fields. Its main campus is in Malacampa, Camiling, Tarlac. Wikipedia.
Agsaoay M.V.,Tarlac College of Agriculture |
Briones R.C.,Tarlac College of Agriculture
Journal of the International Society for Southeast Asian Agricultural Sciences | Year: 2012
This study was conducted in two locations; San Manuel and Capas, Tarlac from 2008-2010. It aimed to determine the population density of major insect pests attacking okra as affected by time of planting, establishment of critical pest level (CPL) of Amrasca biguttula and other associated insect pests, and to assess phenologically the rate of first instar larval/nymph emergence from an eggmass. Feeding tests of insect pests with host were conducted in an experiment nethouse with sufficient batches of trials which had established the critical pest level. Amrasca sp. and Dysdercus cingulatus were found with high population density during the dry seasons planting of 2009-2010, while Spodoptera litura registered a population mean ranging from 11.75 to 23.66 regardless of observation sites. High population of Amrasca sp. was evident during January and onwards as affected by temperature and as shown from the gathered population data which confirmed that planting of okra during dry seasons would entail significant damage of the crop. With a series of feeding interaction tests conducted for Amrasca biguttula, its critical threshold level was established with a population ratio of 45.53 per 50 plants with an allowable yield reduction threshold of 10 percent (%). The generated data is recommended for adoption which contributes to reduced frequency of chemical application and production of quality exportable green okra. Moreover, phenological forecast on the hatchability of the eggs of two major insect pests; Amrasca bigutula and Dysdercus cingulatus were found correlated with temperature while A. biguttula was found correlated with crop age and temperature.
Boncato T.,Tarlac College of Agriculture |
Ellamar J.,Tarlac College of Agriculture
Acta Horticulturae | Year: 2015
Tomato production in the province of Tarlac is characterized by extreme seasonality. In the dry season, there is abundant supply for tomatoes but in the wet season, yield is low, hence, there is limited supply in the market with poor quality of produce that contributes to severe price fluctuations. Production is concentrated during the cool months from October to February which resulted to market glut from January to April and meager supply during the rainy months of June to November (Aganon, 2003). Off-season tomato is now adopted by some farmers in the province of Tarlac using grafted tomato plantlet onto 'EG 203' rootstock (an eggplant cultivar adaptable under Philippine condition that tolerates flooding and bacterial wilt and other soil-borne diseases). This grafting technology on tomato has been developed by the Asian Vegetable Research and development Center (AVRDC, 1994) which included the use of protective structures. This technology promotes offseason tomato production technologies in a commercial scale in the province of Tarlac. Results of the study showed that improvised materials such as bamboo combined with round bars covered with 32-mesh nets per m2 produced yield ranging from 3-4.5 kg plant-1. Moreover, essential observation generated using this technology showed a longer harvesting period compared to non-grafted tomato. The use of bamboo stick to support the plant also improved the yield of the grafted seedlings. Off season tomato planting and marketing can result in profitable tomato production during the hot rainy periods in the Philippines.
Boncato T.A.,Tarlac College of Agriculture |
Aganon C.P.,Central Luzon State University |
Mateo L.G.,Central Luzon State University |
Burleigh J.R.,World Vegetable Center |
And 2 more authors.
Acta Horticulturae | Year: 2014
Tomato production during the hot, wet season (June to November) in lowland areas of Central Luzon, Philippines normally is avoided because the risk of crop failure is high. Flooding from monsoon rains, root diseases, and heat limit crop production. Grafting, bedding, and shelters have been suggested as methods to commercialize tomato production during this period. Fresh weight of marketable fruit from plants grafted onto eggplant 'EG203' was greater than weight from non-grafted plants in six of eight trials. In two of three trials, marketable fruit weight from plants grafted onto tomato 'H7996' was greater than weight from plants grafted onto eggplant EG203. In three of five trials, fruit weight from plants grown under shelter was greater than in open fields. While these studies illustrated the risk of this technology, they also demonstrated that combinations of high-yielding scions and rootstocks, reduced construction costs, and timely planting and marketing can result in profitable tomato production during the hot rainy periods in the Philippines.
Mendoza A.P.,University of the Philippines at Diliman |
Mendoza A.P.,Tarlac College of Agriculture |
Valdez A.R.L.,University of the Philippines at Diliman |
Arceo C.P.,University of the Philippines at Diliman
IMECS 2011 - International MultiConference of Engineers and Computer Scientists 2011 | Year: 2011
This paper aims to verify numerical existence of boundary controls that steer the de St. Venant system in finite time, from a given unsteady subcritical state to another. The method of characteristics is used in obtaining the numerical solution. The problem is divided into two parts: first, an unsteady subcritical flow is steered towards a steady one; then such flow is steered towards another unsteady subcritical state.