Agricultural Science Commons^™

Selecting And Propagating Clones Of Bigtooth Maple (Acer Grandidentatum Nutt.), Melody Reed Richards

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Numerous wild bigtooth maple (Acer grandidentatum Nutt.) specimens in northern Utah have potential for use in landscapes, but improvements in selection and propagation need to be developed before these specimens can be introduced to the green industry. Criteria-based evaluations centered on aesthetics, function, and fall color were performed to objectively select superior bigtooth maple specimens. Out of 56 trees initially selected for red fall color, six were selected for propagation based on all three criteria. Five of the six selected trees yielded viable bud take via chip budding. Optimum time for chip budding propagation was determined by four experiments. …

Control Of Invasive Liriomyza Leafminer Species And Compliance With Food Safety Standards By Small Scale Snow Pea Farmers In Kenya, Zachary Maina Gitonga, Adenirin Chabi-Olaye, Dagmar Mithöfer, Julius Juma Okello, Cecilia Nyawira Ritho

All Peer-Reviewed Publications

The Kenyan horticultural industry faces a new challenge following invasion by the quarantine Liriomyza leafminer species Liriomyza huidobrensis, Liriomyza sativae and Liriomyza trifolii which have recently become pests of economic importance. Controlling Liriomyza leafminers poses serious difficulties due to their biology and quarantine status. This paper examines farmers' awareness of the pests and difficulties faced in controlling them. (1) A questionnaire survey showed that snow pea farmers in Kenya rely mainly on pesticides for control of invasive Liriomyza leafminers; (2) Sixty five percent of respondents perceived pesticides to be ineffective; (3) As a result, 74% of respondents increased the frequency …

Genetic Diversity Of Selected Sea Oats (Uniola Paniculata L.) Lines Using Amplified Fragment Length Polymorphism (Aflp), Sarah E. Bertrand

Honors Capstones

No abstract provided.

Arkansas Corn And Grain Sorghum Performance Tests 2010, R. D. Bond, D. G. Dombek, J. A. Still, R. M. Pryor

Arkansas Agricultural Experiment Station Research Series

Corn and grain sorghum performance tests are conducted each year in Arkansas by the University of Arkansas Division of Agriculture. The tests provide information to companies marketing seed within the state and aid the Arkansas Cooperative Extension Service in formulating recommendations for producers.

Guano Exploitation In Madagascar, Christina Buliga

Independent Study Project (ISP) Collection

Agriculture in Madagascar continues to remain largely undeveloped. Out of the eighty percent of Malagasy individuals that live in rural areas an overwhelming sixty five percent practice subsistence agriculture. With respect to the country as a whole this means that out of Madagascar's 58.2 million hectares of available land only 5.2 percent (3 million hectares) are farmed. And out of these 3 million hectares only 67% are cultivated permanently and only 11% are fertilized.

While there are several reasons for why Madagascar’s agriculture has remained largely undeveloped and for why Madagascar continues to rely on imported crops to meet its …

Arkansas Wheat Cultivar Performance Tests 2009-2010, J. T. Kelly, R. G. Miller, R. D. Bond, E. A. Milus, R. K. Bacon

Arkansas Agricultural Experiment Station Research Series

Wheat cultivar performance tests are conducted each year in Arkansas by the Arkansas Agricultural Experiment Station, Department of Crop, Soil and Environmental Sciences. The tests provide information to companies developing cultivars and/or marketing seed within the state and aid the Arkansas Cooperative Extension Service in formulating cultivar recommendations for small-grain producers.

Intsormil-Centa Generan Nuevas Variedades De Sorgo Para Grano Y Forraje Tipo “Bmr”, René Clará Valencia

INTSORMIL Impacts and Bulletins

Científicos del proyecto INTSORMIL-CENTA con base en el Centro Nacional de Tecnología Agropecuaria y Forestal (CENTA) de El Salvador, han trabajado cinco años para formar variedades de sorgo para grano y forraje de libre polinización que puedan ser mas nutritivas a los animales bovinos. En este sentido se ha incorporado el gen “bmr-12”, enviado por el Dr. Gebisa Ejeta de la Universidad de Purdue, U.S.A., a las variedades comerciales CENTA S-2, CENTA S-3, CENTA RCV y VG 146, al mismo tiempo se han formado nuevas variedades con este mismo gen. El la primera generación, se obtuvieron 76 nuevas …

Summaries Of Arkansas Cotton Research 2009, Derrick M. Oosterhuis

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Susceptibility Of Isofamilies Of Spodoptera Frugiperda (Lepidoptera: Noctuidae) To Cry1ac And Cry1fa Proteins Of Bacillus Thuringiensis, Carlos A. Blanco, Maribel Portilla, Juan Luis Jurat-Fuentes, Jaime F. Sanchez, Diego Viteri, Paulina Vega-Aquino, Antonio P. Teran-Vargas, Ausencio Azuara-Dominguez, Juan D. Lopez Jr., R. S. Arias, Yu-Cheng Zhu, David Lugo-Barreras, Ryan Jackson

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The fall armyworm, Spodoptera frugiperda (J. E. Smith), is one of the most important insect pests on the American continent. Its control has relied primarily on multiple applications of insecticides that can amount to 1,000 g of active ingredient per hectare on some of approximately 30 crops the insect damages. The use of genetically engineered crops that express Bacillus thuringiensis (Bt) Berliner toxins, Bt-corn, Zea mays L.; and Bt-cotton, Gossypium hirsutum L.; are other ways to control this insect. However, fall armyworm is one of the Lepidoptera species least susceptible to Bt proteins, and a case of high tolerance to …

Anopheles Larval Abundance And Diversity In Three Rice Agro-Village Complexes Mwea Irrigation Scheme, Central Kenya, Joseph M. Mwangangi, Josephat Shililu, Ephantus J. Muturi, Simon Muriu, Benjamin Jacob, Ephantus W. Kabiru, Charles M. Mbogo, John Githure, Robert J. Novak

All Peer-Reviewed Publications

Background. The diversity and abundance of Anopheles larvae has significant influence on the resulting adult mosquito population and hence the dynamics of malaria transmission. Studies were conducted to examine larval habitat dynamics and ecological factors affecting survivorship of aquatic stages of malaria vectors in three agro-ecological settings in Mwea, Kenya. Methods. Three villages were selected based on rice husbandry and water management practices. Aquatic habitats in the 3 villages representing planned rice cultivation (Mbui Njeru), unplanned rice cultivation (Kiamachiri) and non-irrigated (Murinduko) agro-ecosystems were sampled every 2 weeks to generate stage-specific estimates of mosquito larval densities, relative abundance and diversity. …

2010 Barley Variety Sowing Guide For Western Australia, Blakely Paynter, Andrea Hills, Peter Clarke, Jason Bradley, Vivien A. Vanstone, Harmohinder Dhammu, Sanjiv Gupta

Bulletins 4000 -

This variety guide is designed as a quick reference to help growers, consultants and advisers determine which barley variety to grow in their region. It provides grain yield comparisons, disease ratings, herbicide tolerance data and agronomic information for all malting barley varieties, as well as established and new feed varieties.

B. R. Wells Rice Research Studies 2009, R. J. Norman, K. A. K. Moldenhauer

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Soybean Diseases : A Pictorial Guide For South Dakota, Lawrence E. Osborne, Darrel Deneke, Thomas Chase, Marie Langham

SDSU Extension Circulars

This publication was assembled to provide growers and crop managers in South Dakota and nearby states with easy-to-use and handy diagnostic information for a number of major or potentially problematic soybean diseases. It is intended to provide a starting point for management decisions.

Growing Biserrula To Improve Grain And Livestock Production, Angelo Loi, Natalie Hogg, Clinton Revell, Diana Fedorenko

Bulletins 4000 -

Biserrula pelecinus is a new genus of pasture legume which was developed for commercial agriculture by a team of Perth-based legume pasture scientists in the early 1990s. Biserrula is an annual pasture legume that is found in natural grasslands of the Mediterranean Basin, frequently on acidic soils derived from granite. It was this feature that first caught the eye of researchers who were attempting to develop species that could tolerate the soil stresses of acidity and low moisture-holding capacity. These stresses are common in WA and when they occur together they are problematical for the survival of annual medics and …

Geographic Distribution, Host Range And Perennation Of Cotesia Sesamiae And Cotesia Flavipes Cameron In Cultivated And Natural Habitats In Kenya, Duna Madu Mailafiya, Bruno Pierre Le Ru, Eunice Waitherero Kairu, Paul André Calatayud, Stéphane Dupas

All Peer-Reviewed Publications

Field surveys were carried out in four agroecological zones to assess the geographic distribution, host range and perennation of Cotesia sesamiae and Cotesia flavipes in cultivated and natural habitats in Kenya. The distribution of the two Cotesia species in different ecological regions was most affected by the suitability of the local stem borer species for parasitoid development, and temperature, as both species were found in localities dominated by their suitable host(s) where temperature favoured their occurrence. Fourteen years after its release, C. flavipes has maintained a high level of specificity to its target host Chilo partellus on maize and sorghum …

Following Tetraploidy In Maize, A Short Deletion Mechanism Removed Genes Preferentially From One Of The Two Homeologs, Margaret R. Woodhouse, James C. Schnable, Brent S. Pedersen, Eric Lyons, Damon Lisch, Shabarinath Subramaniam, Michael Freeling

Department of Agronomy and Horticulture: Faculty Publications

Previous work in Arabidopsis showed that after an ancient tetraploidy event, genes were preferentially removed from one of the two homeologs, a process known as fractionation. The mechanism of fractionation is unknown. We sought to determine whether such preferential, or biased, fractionation exists in maize and, if so, whether a specific mechanism could be implicated in this process. We studied the process of fractionation using two recently sequenced grass species: sorghum and maize. The maize lineage has experienced a tetraploidy since its divergence from sorghum approximately 12 million years ago, and fragments of many knocked-out genes retain enough sequence similarity …

Capacitan A Panificadores Para Utilizar Sorgo, Roxana Ortiz

INTSORMIL Impacts and Bulletins

Cerca de 300 pequeños empresarios del pan serán capacitados sobre elaboración de harina de sorgo, usos en preparación de alimentos y bebidas étnicas por el Centro Nacional de Tecnología Agropecuaria y Forestal (CENTA) Enrique Álvarez Córdova, a través del Laboratorio de Tecnología y Alimentos.

Poisonous Rangeland Plants In San Luis Obispo County, Sara Litten, Amanda Ou

Animal Science

Poisonous Rangeland Plants in San Luis Obispo County is a comprehensive educational guide to rangeland plants that are toxic to domestic livestock. This guide begins with an exploration of how the biological systems are affected by the poisonous plant toxins. The biochemistry behind these toxins is included in the discussion. Next, reference material for fourteen plants that inhabit San Luis Obispo County is provided. This information includes specific toxins found in poisonous plants, affected animals, symptoms of poisoning, stages of growth, lethal dose, and distribution of the plant in California. This section of the guide is filled with helpful photos …

Good Agricultural Practices For Food Safety Of Fresh Produce, Laurie Hodges

Department of Agronomy and Horticulture: Faculty Publications

What are the guiding principles of food safety for fresh produce?

• Once contaminated, removing or killing pathogens on produce is very difficult.

• Preventing microbial contamination at all steps, from production to distribution, is strongly favored over treatments to eliminate contamination that may have occurred.

• Document the implementation of prevention programs, and educate workers at all levels of the agricultural and packing environments on food safety.

Key Signatures of a Credible Food Safety Program

The following is a condensed checklist of practices and conditions that reduce the potential for fresh produce to be exposed to pathogenic microbes. Review …

Isoschaftoside, A C-Glycosylflavonoid From Desmodium Uncinatum Root Exudate, Is An Allelochemical Against The Development Of Striga, Antony M. Hooper, Muniru K. Tsanuo, Keith Chamberlain, Kay Tittcomb, Julie Scholes, Ahmed Hassanali, Zeyaur R. Khan, John A. Pickett

All Peer-Reviewed Publications

In East African small-holder farming of maize, the cattle forage legume, Desmodium uncinatum is used as an intercrop due to its allelopathic inhibition of parasitism by Striga hermonthica, an obligate parasitic weed that can devastate the maize crop. Bioassay-guided fractionation of the root extract of D. uncinatum revealed isoschaftoside to be the main compound in the most potent fraction inhibiting growth of germinated S. hermonthica radicles. Bioassays repeated with isoschaftoside isolated from a different plant source, Passiflora incarnata, proved it to be a biologically active component. Analysis of the root exudates produced by hydroponically grown D. uncinatum showed isoschaftoside to …

Participatory Evaluation Of Integrated Pest And Soil Fertility Management Options Using Ordered Categorical Data Analysis, Hugo De Groote, Esther Rutto, George Odhiambo, Fred Kanampiu, Zeyaur Khan, Richard Coe, Bernard Vanlauwe

All Peer-Reviewed Publications

Maize is becoming the major food crop around Lake Victoria. Major constraints to its production are Striga, stem borer, and declining soil fertility. Innovative integrated technologies have been developed: the 'push-pull' system (intercropping with Desmodium and surrounded by Napier grass), soybean and Crotalaria rotations, and imidazolinone-resistant (IR) maize seed. In 12 demonstration trials in four villages in Siaya and Vihiga districts (Kenya) and two villages in Busia (Uganda) in 2003 and 2004, 504 farmers evaluated all cropping systems and a mono-cropped continuous maize, each cropped with IR or local maize, and supplemented or not with fertilizer, totaling 16 treatments. Farmers …

Urban Farm: Naturally Grown Local Food, Stephanie Shepard

Interior Design Program: Terminal Projects

There are many things to be said for the benefits of urban farming. From feeding the hungry, to providing an educational experience for a community that otherwise has no agricultural knowledge, to reducing heat island effect, the gain is almost immeasurable.

According to the United States Census Bureau, 35.9 million people live below the poverty line in America. Requests for emergency food assistance has increased by an average of 14% a year since 2004 and about 20% of those requests generally go unmet. In addition, national food banks report that 23.3 million people turned to their services in 2009, an …

Arkansas Turfgrass Report 2009, Douglas Karcher, Aaron Patton, Michael Richardson

Arkansas Agricultural Experiment Station Research Series

No abstract provided.

Departments Of Defense And Agriculture Team Up To Develop New Insecticides For Mosquito Control, David Hoel, Julia Pridgeon, Ulrich R. Bernier, Kamal Chauhan, Kumudini Meepagala, Charles Cantrell

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Mosquito-borne pathogens are among the most important sources of human disease that cause morbidity and mortality worldwide. They include the viruses responsible for deadly outbreaks of yellow fever, Rift Valley fever, eastern equine encephalitis, Japanese encephalitis and dengue, and an assortment of other serious illnesses caused by the etiological agents of West Nile fever, St Louis encephalitis, Murray Valley encephalitis, Venezuelan equine encephalitis and chikungunya disease. Dengue viruses, of which there are 4 serotypes, cause an estimated 50-100 million new illnesses each year (and 25,000 deaths) while the latest chikungunya epidemic has lasted longer, affected more people, and occurred over …

Effect Of African Nightshade Species (Solanaceae) On Developmental Time And Life Table Parameters Of Tetranychus Evansi (Acari: Tetranychidae), Lucy Kananu Murungi, Aggrey Nyende, John Wesonga, Peter Masinde, Markus Knapp

All Peer-Reviewed Publications

The effect of five African nightshade (Solanum sp.) species on the biological and demographic parameters of the tomato spider mite, Tetranychus evansi Baker and Pritchard, was examined in the laboratory at 25 ± 1°C, 70-80% RH and 12L:12D photoperiod. Duration of each development stage, reproduction rate, longevity, intrinsic rate of natural increase (rm), and doubling time (DT) of the tomato spider mite on the five nightshade species were calculated. The results indicated that S. villosum, S. scabrum, S. tarderemotum and S. americanum are more suitable for T. evansi due to a shorter developmental period, longer adult longevity, higher reproduction and …

Intsormil Helps Improve Varieties Of Grains In Developing Countries, Lori Mcginnis

INTSORMIL Impacts and Bulletins

International efforts to aid food production in developing countries are based within the Institute of Agriculture and Natural Resources at the University of Nebraska–Lincoln.

The International Sorghum and Millet Collaborative Research Support Program (INTSORMIL CRSP) was established at UNL’s East Campus in 1979. Its goal is to improve the devel- opment of sorghum, millet, and other grains in Central America and Africa, said John Yohe, director since 1988.

Proceedings Of The 37th Annual Meeting, Southern Soybean Disease Workers (March 10-11, 2010, Pensacola Beach, Florida), Jason Bond, Boyd Padgett, Clayton A. Hollier, Alemu Mengistu, Cliff Coker, Stephen R. Koenning

Southern Soybean Disease Workers: Conference Proceedings

Contents

SSDW treasury report

Southern United States Soybean Disease Loss Estimates for 2009. Compiled by SR Koenning

Green Bean symposium (Jason Bond, moderator)

Factors Contributing to Green Plants at Maturity. DJ Boquet, RL Leonard, GB Padgett, RW Schneider, J Griffin, J Davis, and R Vaverde

The Green Stem Disorder Enigma in Illinois. C Hill and G. Hartman

The Influence of Fungicides, Herbicides, and Their Interactions on Green Bean Syndrome. GB Padgett, DJ Boquet, RW Schneider, and MA Purvis

Association of Stink Bug Injury with A "Green Plant" Malady in Soybean. JH Temple, BR Leonard, J Davis, P Price, and J …

Lincoln South Rotary Program, February 2010 [Lincoln, Nebraska, Usa]: Global Food Security--Intsormil, Elvis A. Heinrichs

INTSORMIL Impacts and Bulletins

Short Heinrichs spoke to the Lincoln South Rotary Club in February 2010 about global food security. What is food security? The availability of food and access to it. Many countries have food available but the population has no access to it. Heinrichs gave the group some sobering statistics regarding hunger in the world. Nine hundred forty-seven million people in the world are undernourished. One hundred forty-six billion kids under age 5 are underweight. One in seven people are hungry, and one in six people do not have safe drinking water. Ten million kids die each year from hunger related causes. …

First Report Of Two Curtoviruses In Spinach And Common Beet In Arizona, Claudia Nischwitz

All Current Publications

No abstract provided.

Arkansas Cotton Variety Test 2009, Fred M. Bourland, A. B. Beach, D. P. Roberts Jr.

Arkansas Agricultural Experiment Station Research Series

The primary goal of the Arkansas Cotton Variety Test is to provide unbiased data regarding the agronomic performance of cotton varieties and advanced breeding lines in the major cotton-growing areas of Arkansas. This information helps seed companies establish marketing strategies and assists producers in choosing varieties to plant.