385 results match your criteria: "Tropical Research and Education Center[Affiliation]"

Impacts of soil and water conservation measures on soil physicochemical properties in the Jibgedel Watershed, Ethiopia.

Environ Monit Assess

March 2023

College of Agriculture and Environmental Sciences, Natural Resources Management, University of Gondar, P. Box 196, Gondar, Ethiopia.

Soil erosion significantly affects agricultural production. Soil and Water Conservation (SWC) measures have been constructed to reduce soil loss. However, the impact of SWC measures on physicochemical soil properties has rarely been investigated in most parts of Ethiopia.

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Genome Resources for the Colletotrichum gloeosporioides Species Complex: 13 Tree Endophytes from the Neotropics and Paleotropics.

Microbiol Resour Announc

April 2023

Northeast Area Director's Office, U.S. Department of Agriculture, Agricultural Research Service, Beltsville, Maryland, USA.

Thirteen draft genome assemblies are presented for four Colletotrichum gloeosporioides complex species, namely, Colletotrichum aeschynomenes, Colletotrichum asianum, Colletotrichum fructicola, and Colletotrichum siamense, which were isolated from tropical tree hosts as endophytes.

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Liebm. (Araceae, Monocots), sometimes referred to as Swiss cheese plant, is one of the most common aroids used as an indoor and landscape ornamental plant (Cedeño et al. 2020).

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Asian bean thrips, Bagnall, are a serious pest of vegetable crops, especially leguminous crops, across the Asian continent. In Florida, it is a new invasive pest of snap beans. In 2019, it was recorded for the first time in the United States in snap bean () fields.

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Biocontrol Efficacy of TA-1 Against in Tomato.

Plant Dis

September 2023

Key Laboratory of Pesticide Toxicology & Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, Shandong 271018, China.

Root-knot nematodes (RKNs) are harmful plant-parasitic nematodes of tomatoes which can cause significant yield losses. Therefore, there is increasing interest in exploring the application of bacterial nematicides. The bacterium TA-1 is a broad-spectrum biological control agent; however, its effect on RKNs control remains largely unclear.

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Purpose: Root system architectures are complex and challenging to characterize effectively for agronomic and ecological discovery.

Methods: We propose a new method, Spatial and Texture Analysis of Root SystEm distribution with Earth mover's Distance (STARSEED), for comparing root system distributions that incorporates spatial information through a novel application of the Earth Mover's Distance (EMD).

Results: We illustrate that the approach captures the response of sesame root systems for different genotypes and soil moisture levels.

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Bacterial spot of tomato continues to pose a significant problem to tomato production worldwide. In Florida, bacterial spot of tomato caused by Xanthomonas perforans is one of the most important diseases responsible for tomato yield loss. This disease is difficult to control, and new strategies are continually being investigated to combat the devastating effect of this disease.

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Bio-based Polyurethane Based on a Dynamic Covalent Network with Damage Tolerance for Controlled Release of Fertilizers.

ACS Appl Mater Interfaces

December 2022

National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources; National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong 271018, China.

Bio-based polyurethanes are promising for the controlled release of nutrients and fertilizers, but their toughness and plasticity need to be improved. We developed a smooth, dense, elastic, and indestructible bio-based polyurethane (BPU) coating with a nutrient controlled release ∼150% superior, a tensile strength ∼300% higher, and a toughness ∼1200% higher than those for the original BPU coating. Through a one-step reaction of soybean oil polyols (accounting for more than 60%), isocyanate, and benzil dioxime, the dynamic covalent network based on oxime-carbamate replaces part of irreversible covalent cross-linking.

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Background: Vanilla is a globally important spice crop used in a variety of food, cosmetic, and pharmaceutical products. V. planifolia is the primary commercial species with V.

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Lychee fruit production (Litchi chinensis) has been threatened in many regions of the world where the presence has been reported of the litchii erinose mite, Aceria litchii (Keifer). This study aims to identify the arthropod community associated with A. litchii on lychee plants in Minas Gerais, Brazil, and to seek for potential natural enemies associated with this mite pest in this region.

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Redbay ambrosia beetle, , is an invasive wood-boring pest first detected in the USA in 2002 in Georgia. The beetle's dominant fungal symbiont, , causes laurel wilt, a lethal disease of trees in the Lauraceae. Over the past 20 years, and laurel wilt have spread to twelve southeastern states, resulting in high mortality of native species, including redbay (), swampbay (), and silkbay ().

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Bio-based controlled release fertilizers (BCRFs) are cost-effective and renewable thus gradually replacing petroleum-based controlled release fertilizers (CRFs). However, most of the study mainly focused on modifying BCRFs to improve controlled-release performance. It is necessary to further increase the functionality of BCRF for expanding the application.

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The south Florida pine rocklands is a critically endangered, fire-dependent ecosystem dominated by the overstory tree Pinus densa (South Florida slash pine). Because pine recruitment in this ecosystem has proven problematic, restoration efforts need to include replanting slash pine trees. Even though ectomycorrhizal fungi are known to be critical symbionts of young pines and are necessary for the development of healthy pines, virtually nothing is known about these mutualists and their role in pine establishment and survival in the pine rocklands.

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Volatiles from male honeydew excretions attract conspecific male spotted lanternflies, (Hemiptera: Fulgoridae).

Front Insect Sci

September 2022

Forest Pest Methods Laboratory, USDA-APHIS-PPQ-S&T, Buzzards Bay, MA, United States.

The spotted lanternfly (SLF), (Hemiptera: Fulgoridae), is a generalist phloem feeder that produces copious amounts of honeydew, which in turn coats the understory. These insects form large aggregations covering the trunks of some trees, while similar trees nearby mysteriously seem unattractive. We investigated whether volatiles from SLF honeydew are attractive to conspecifics by collecting honeydew from the field and testing it for SLF attraction in a two-choice olfactometer.

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Using liquefied biomass hydrogel to mitigate salinity in salt-affected soils.

Chemosphere

December 2022

Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, 32611, USA.

Salinity affects over 33% of irrigated farmland globally. Developing a low-cost, safe, and effective material as a soil salinity mitigation option would be of significant importance. This study proposed to synthesize a hydrogel using liquefied biomass from sugarcane bagasse, polyvinyl alcohol, and sodium tetraborate decahydrate.

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Interspecific hybridization in Cucurbita crops (squash) is desirable for widening genetic variation and for the introgression of useful alleles. Immature embryos generated from these wide crosses must be regenerated using appropriate embryo rescue techniques. Although this technique is well established for many crops, a detailed description of the appropriate methodology for squash that would allow its routine application is lacking.

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Combined effects of hydrothermally-altered feldspar and water regime on cadmium minimization in rice.

Environ Res

December 2022

Federal University of Lavras, Department of Soil Science, School of Agriculture, Lavras, Minas Gerais, 37200-900, Brazil. Electronic address:

The accumulation of cadmium (Cd) in grains and edible parts of crops poses a risk to human health. Because rice is the staple food of more than half of the world population, reducing Cd uptake by rice is critical for food safety. HydroPotash (HYP), an innovative potassium fertilizer produced with a hydrothermal process, has the characteristics of immobilizing heavy metals and potential use for remediating Cd-contaminated soils.

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Picture-winged flies (Diptera: Ulidiidae) are the most damaging insect pests of sweet corn (Zea mays L.) produced in Florida for the fresh market. Management of these pests, referred to as corn silk flies, relies on frequent pyrethroid applications targeting adults.

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Electroantennographic Responses of Wild and Laboratory-Reared Females of Eichhoff and (Fabricius) (Coleoptera: Curculionidae: Scolytinae) to Ethanol and Bark Volatiles of Three Host-Plant Species.

Insects

July 2022

Red de Manejo Biorracional de Plagas y Vectores, Instituto de Ecología AC (INECOL)-Clúster Científico y Tecnológico BioMimic®, Carretera Antigua a Coatepec 351, El Haya, Xalapa 91073, Veracruz, Mexico.

Chemical ecology studies on ambrosia beetles are typically conducted with either wild or laboratory-reared specimens. Unlike laboratory-reared insects, important aspects that potentially influence behavioral responses, such as age, physiological state, and prior experience are unknown in wild specimens. In this study, we compared the electroantennographic (EAG) responses of laboratory-reared and wild and to 70% ethanol and bark odors (host kairomones) of , , and aged for 2, 24, and 48 h.

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Halo blight, caused by pv. , is one of the major bacterial diseases on snap bean in Florida, and the outbreaks of this disease have occurred more often in recent years. Current management of this disease primarily depends on application of fixed copper-based bactericides but climate change and resistance development in the pathogen populations still cause hardship for management of this disease, especially in south Florida.

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Exposure to fluopimomide at sublethal doses causes oxidative stress in Caenorhabditis elegans regulated by insulin/insulin-like growth factor 1-like signaling pathway.

Environ Toxicol

October 2022

Key Laboratory of Pesticide Toxicology & Application Technique, College of Plant Protection, Shandong Agricultural University, Tai'an, 271018, People's Republic of China.

Fluopimomide is an innovative pesticide, widely used for agricultural pest management; however, little is known about its effect on non-target organisms. This study was designed to assess the potential risk of fluopimomide and the molecular mechanisms using Caenorhabditis elegans, a common model animal. The oxidative stress-related indicators were analyzed in C.

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The Caribbean fruit fly, Anastrepha suspensa (Loew) (Diptera: Tephritidae), is a quarantine pest of Citrus spp. and a production pest of guava and other specialty fruits in Florida. Effective monitoring lures and traps are needed for early pest detection and timely initiation of control measures.

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High-quality genome assembly and pan-genome studies facilitate genetic discovery in mung bean and its improvement.

Plant Commun

November 2022

Institute of Cereal and Oil Crops, Hebei Academy of Agricultural and Forestry Sciences/Hebei Laboratory of Crop Genetics and Breeding, Shijiazhuang 050035, China. Electronic address:

Article Synopsis
  • Mung bean is a valuable legume used for food, medicine, and as a vegetable, and researchers have created a comprehensive reference genome (Vrad_JL7) with about 40,125 annotated protein-coding genes.
  • They analyzed genetic data from 217 accessions primarily from China, identifying over 2.2 million high-quality SNPs and uncovering two distinct Chinese genetic groups, suggesting its domestication in South Asia and introduction into East Asia via the Silk Road.
  • A pan-genome was constructed, showing a majority of core genes, with notable variations related to flowering adaptation and 2,912 SNPs linked to important agricultural traits, offering valuable insights for mung bean breeding.
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One negative consequence of international trade of agricultural commodities is the inadvertent global spread of crop diseases. Yam ( spp.) is a staple food crop in many countries and is traded globally.

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Whole Genome Re-sequencing and Bulk Segregant Analysis Reveals Chromosomal Location for Papaya Ringspot Virus W Resistance in Squash.

Front Plant Sci

May 2022

Horticultural Sciences Department and the Tropical Research and Education Center, University of Florida, Homestead, FL, United States.

Squash () is among the most important cucurbit crops grown worldwide. Plant pathogen, Papaya ringspot virus W (PRSV-W) causes significant yield loss in commercial squash production globally. The development of virus-resistant cultivars can complement integrated disease management and mitigate losses due to viral infections.

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