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Estimating The Size Of Retained Canola Seed, Department Of Primary Industries And Regional Development, Western Australia

Grains and other field crops factsheets

The size of canola seed (or number of seeds per kilogram) is essential in calculating the seeding rate for the crop. The rate needs to be high enough to get good establishment and protect against pests, diseases, or other seeding issues.

To work out the seeding rate, the seed size or number of seeds per kilogram. This can be easily calculated by farmers who retained seed.

Summer- And Fall-Planted Cover Crops Across Nebraska: Assessing Performance Using Aerial Imagery And Evaluating Short-Term Soil Impacts, Grace Emperatriz Pacheco Jiron

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

Cover crops are widely recognized for improving soil health and promoting sustainability in agricultural systems. Despite the increasing use of monitoring tools like aerial imagery, their application in evaluating summer-planted cover crops in the Great Plains remains limited, hindering effective management strategies. Fall-planted cover crops provide long-term environmental benefits, including enhanced soil quality and erosion control; however, understanding their short-term effects on soil properties is crucial for encouraging adoption. This study assessed summer- and fall-planted cover crops across Nebraska, integrating aerial imagery and soil health analyses.

Over two years, fifteen summer-planted monocultures and five mixtures were evaluated for establishment, biomass …

Clomazone And Oxyfluorfen Combinations In A Flooded Rice System, Jason K. Norsworthy, Casey H. Arnold, Thomas R. Butts, Trenton L. Roberts, Chad W. Shelton

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Rice producers battle herbicide-resistant weeds worldwide while producing rice for ≥50% of the world’s population. Oxyfluorfen can provide rice producers with an alternative site of action for barnyardgrass control, as there are no documented cases of grass weeds being resistant to the herbicide in the mid-southern United States. Oxyfluorfen is anticipated to be labeled in the Roxy Rice Production System and may be sold as a clomazone/oxyfluorfen premixture; hence, experiments were conducted in 2021 and 2022 to evaluate preemergence-applied clomazone/oxyfluorfen ratios compared to clomazone alone on silt loam and clay soils. All ratios of the herbicides caused less than 7% …

Ur’S Witness Oak Project Honors Enslaved Ancestors, W. John Hayden

Biology Faculty Publications

This article is about one tree and one cemetery plot. Though the existence of some may have been forgotten, many more burial grounds for the enslaved are known and some of these may still have trees old enough to have “witnessed” the interments of those who toiled so hard, for so long. What better way to remember their contributions to the land that continues to nourish us than by maintaining a living legacy of Witness Tree progeny?

Arthropod Arbiters: Natural Enemy Communities Mediate The Effects Of Landscape And Local-Scale Complexity On Lygus-Induced Crop Loss In Organic Strawberries, Adrian Lu, David J. Gonthier, Amber Sciligo, Karina Garcia, Taiki Chiba, Gila Juárez, Claire Kremen

Entomology Faculty Publications

Sustainable pest management requires growers and regional land managers to consider the relationships among pest management practices, pest and natural enemy communities, crop loss, and multi-scalar habitat complexity. However, the causal links among these variables, in particular potential interactions between landscape and local-scale habitat complexity, remain underexplored. In the context of organically managed strawberry crops in California’s Central Coast, we tested the independent effects of landscape and local habitat complexity gradients on arthropod communities and crop loss using a piecewise structural equation model (PSEM). We found that landscape-scale woody habitat proportion indirectly decreased crop loss through its positive effect on …

Red Fox, Department Of Primary Industries And Regional Development, Western Australia

Biosecurity factsheets

This factsheet provides information on the red fox in Western Australia (WA).

The red fox (Vulpes vulpes) is a native of the northern hemisphere where it occurs throughout most of Europe, Asia, North America, and the northern coast of Africa. The red fox was first introduced to Australia (Victoria) from Britain as early as 1845 for hunting with foxhounds. Having become successfully established in Victoria by about 1870, it colonised most of mainland Australia over the next 70 years. Foxes are not found in the most northern regions of Australia, including northwest Kimberley.

In WA, the fox is a declared …

Rabbit Control: Fumigation, Department Of Primary Industries And Regional Development, Western Australia

Biosecurity factsheets

Fumigation for rabbit control involves the introduction of poisonous gas into a warren. It is one of the best control methods to use where low numbers of rabbits live in a few widely scattered warrens. The threat to non-target animals is minimal. This factsheet should be read in conjunction with registered product labels and directions for use. Check the Department of Health, Western Australia website (health.wa.gov.au) for public health requirements for the use of phosphine fumigation.

Fumigation may be used in areas where access is limited, such as fence lines, around trees, and on riverbanks, but it may be difficult …

Insect Pests And Their Management In Oats, Department Of Primary Industries And Regional Development, Western Australia

Grains and other field crops factsheets

Field pests

Damage from invertebrate pests is generally not a major factor for oat crops, however there is a zero tolerance to live pests in export hay.

Significant damage can occur if pest populations build up. Planning rotations to minimise pest carryover, timely sowing, adequate crop nutrition, and good control of weed and root diseases will assist in reducing the likelihood of crop damage by insect pests. Check crops regularly throughout their growth for field insects.

• Control redlegged earth mite and lucerne flea during the seedling stage if necessary.

• Aphids should be checked for and controlled from flag …

Factors Affecting Herbicide Performance, Department Of Primary Industries And Regional Development, Western Australia

Grains and other field crops factsheets

Herbicide performance can vary greatly depending on factors including compatibility of herbicides, water quality, sprayer decontamination, and controlling stressed weeds. This page outlines these issues and demonstrates how to assess herbicide performance to achieve the best from your herbicides.

What Do Turtleheads & Cotton Have In Common?, W. John Hayden

Biology Faculty Publications

I will not be offended if, dear reader, your response to the question posed in the title is something along the lines of, “Hmmm, probably not very much!”

Oxyfluorfen Use In Combination With Clomazone Or Quinclorac, Jason K. Norsworthy, Casey H. Arnold, Thomas R. Butts, Chad W. Shelton

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Oxyfluorfen is a herbicide that inhibits protoporphyrinogen IX oxidase and has shown significant potential in its ability to control barnyardgrass. Oxyfluorfen is categorized as a Group 14 herbicide by the Herbicide Resistance Action Committee (HRAC)/Weed Science Society of America (WSSA). Despite its current lack of labeling for use on rice in the mid-southern United States due to its potential to cause crop injury, the introduction of a trait in rice that confers resistance to oxyfluorfen could provide producers with an effective alternative site of action for weed control. Field experiments were conducted during the 2021 and 2022 growing seasons near …

A Dendrochronological Analysis Of Longleaf And Associated Pines From The Blackwater Ecological Preserve In Southeastern Virginia, Sarah Durham

Biological Sciences Theses & Dissertations

The field of dendrochronology utilizes annual tree ring growth data to create chronologies, which function as proxies to measure the effect of climate on radial growth. In the southeastern United States, dendrochronological studies involving the effect of climate on the growth of Pinus species exist, but significant gaps persist. For this study, I: 1) created chronologies of earlywood, latewood, and total ring-width growth for longleaf pine (Pinus palustris Mill.), loblolly pine (P. taeda L.), and pond pine (P. serotina Michx.) and 2) conducted a climate analysis on each species to determine how climatic factors affected radial …

Blackbird, Department Of Primary Industries And Regional Development, Western Australia

Biosecurity factsheets

The introduced common blackbird (Turdus merula) is a pest in eastern Australia. It damages commercial fruit crops and may compete with native birds. The species is prohibited in Western Australia and individuals found here are destroyed.

The Western Australian Organism List (WAOL) contains information on the area(s) in which this pest is declared and the control and keeping categories to which it has been assigned in Western Australia (WA). For more information, see our website at dpird.wa.gov.au.

Feral Goat, Department Of Primary Industries And Regional Development, Western Australia

Biosecurity factsheets

The goat (Capra hircus) was one of the first animals to be domesticated, 8 to 10 thousand years ago. Archaeological work indicates the earliest attempts at domestication were in dry hills surrounding the Mediterranean basin. The ability of goats to utilise the coarse browse of mountainous areas made them suitable for domestication, in preference to sheep. With large-scale domestication of goats throughout the world, goats escaped and established feral goat herds on most continents. Overgrazing by goats has caused severe environmental damage, worldwide.

Goats arrived in Australia with the first fleet. They were introduced to many areas by early settlers …

Resistance To Acetyl Coenzyme A Carboxylase (Accase) Inhibitor In Lolium Multiflorum: Effect Of Multiple Target-Site Mutations, Gulab Rangani, Ana Claudia Langaro, Shilpi Agrawal, Reiofeli Algodon Salas-Perez, Juan Camilo Velasquez, Christopher E. Nelson, Nilda Roma-Burgos

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Italian ryegrass (Lolium multiflorum Lam.) is a persistent weed species that poses significant management challenges in key agricultural crops such as wheat, corn, cotton, and soybean. This study investigated the prevalence of resistance to ACCase inhibitor herbicides, specifically diclofop and pinoxaden, among field-collected Italian ryegrass populations. The survey revealed widespread resistance to diclofop and emerging cross-resistance to pinoxaden. To elucidate the physiological mechanism of ACCase herbicide resistance, we investigated mutations in the carboxyl-transferase (CT) domain of the ACCase enzyme, a critical region for herbicide sensitivity. Using dCAPS assays and CT domain sequencing, several known resistance-conferring mutations were detected in …

Creating Sustainable School And Home Gardens: Beneficial Biological Control Insects, Kaitlin Campbell, Rita Hagevik, Kathy Cabe Trundle

All Current Publications

On small scales, like school and home gardens, encouraging biological control agents can be highly effective, reducing the need for insecticides that harm the environment, humans, and beneficial insects. This fact sheet provides information on using beneficial insects in your garden and offers a field guide to identify them.

Satellite Observations Indicate That Chia Uses Less Water Than Other Crops In Warm Climates, Brian Kirsch, Joshua B. Fisher, Thomas Piechota, Mohammad Hassani, Diego C. Suardiaz, Radhika Puri, Joseph Cahill, Hagop S. Atamian

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Many parts of the world face severe and prolonged drought conditions, stressing the sustainability of water resources and agriculture. Transitioning to water-efficient crops is one strategy that can help adapt to water scarcity. An emerging drought-tolerant crop of interest is chia (Salvia hispanica). Yet, no study has compared its large-scale water use dynamics to those of widely established crops across the globe. Here, we use satellite data over multiple years to assess the water use efficiency of chia, alfalfa, corn, and soybean globally. Results show that chia consumed 13-38% less water than alfalfa, corn, and soy and assimilated …

Evaluation Of Cotton Advanced Lines/Varieties For Genetic Diversity And Correlation Studies Of Cotton Leaf Curl Virus Disease With Yield Contributing Traits In Cotton, Nouman Bilal, Wajid Nazeer, Abdul Latif Tipu, Shoaib Liaqat, Muhammad Sarwar, Ansar Ali, Khadim Hussain, Maria Basheer

Journal of Bioresource Management

Plant genetic diversity aids in the creation of new varieties that are more resistant to pests and unfavorable climatic conditions. In order to discover varied parents and assess their cross-performance, the current study was carried out. The findings showed a substantial positive connection (0.81) between green bolls, plant height (0.57), and open bolls, as well as a significant positive correlation (0.52) between open bolls. On the other hand, a highly significant negative connection was discovered between the number of open bolls (-0.59), number of green bolls (-0.72), plant height (-0.78), and major stem nodes (-0.70) for the cotton leaf curl …

Foliar Application Of Vermitea On Wheat Against Salt Stress Under Hydroponic Condition, Basir Ahmed, Anser Ali, Muhammad Sarwar, Wajad Nazeer, Imdad Ullah

Journal of Bioresource Management

Salinity is one of the major issues that drastically reduce wheat production. In a hydroponic investigation, vermitea was employed to evaluate the impact of salinity on wheat. The vermitea is a by-product of the vermicomposting process that has both macro- and micronutrients. When these plants reached full maturity, they were harvested. The evaluation was based on their morphological characteristics, such as root/shoot dry weight, root/shoot ratio, plant height, root/shoot length, number of spikelets per spikelet, spike length, number of grains per spikelet, and biological yield per plant. The leaves relative water contents and other biochemical parameters including K+, Na+, chlorophyll …

Comparative Study Of The Effects Of Conservation Methods On Herbal Plants, Djamila Boukraâ, Djilali Bouhadi, Sara Boudraf

Journal of Bioresource Management

This study aimed to compare the effects of different conservation methods on the biochemical quality and antioxidant activity of mint, celery, parsley, and laurel. The plants were subjected to oven-drying at two temperatures (30 and 50°C), microwave drying at different powers (100, 300 and 600W), refrigeration for 24 hours, and freezing for 24 hours, 7 days and 40 days). The moisture content and dry weight were measured for each method. The total phenolic content, flavonoids level, and antioxidant activity were evaluated in fresh and dried plants. This study revealed a significant relationship between temperatures, time of conservation, species and phytochemical …

Authentication Of Shallots From Brebes Using Gas Chromatography Fingerprinting Technique Combined With Chemometrics, Yana Setyani Pradina, Adelia Puteri, Gina Fauzia Rachma, Nazwa Balqis, Gerli Puspita Anggraini, Hendri Wasito

Makara Journal of Science

Shallots from Brebes, also called Bima Brebes, have a more pungent aroma compared to other varieties. Its high demand results in increased prices in the market, leading to frequent cases of fraud wherein Bima Brebes shallots are replaced with other types of shallots. This study aimed to develop an analytical method using gas chromatography–flame ionization detector (GC-FID) fingerprinting combined with chemometrics to authenticate Bima Brebes shallots. Essential oils were extracted through ultrasonic hydrodistillation, followed by organoleptic, refractive index, GC-FID fingerprinting and chemometric analysis. The yield value of the five studied shallot varieties ranged from 0.02% to 0.08% w/w. Meanwhile, the …

Phenotypic Correlation, Path Analysis, And Quantitative Trait-Based Selection Of Elite Wheat Genotypes Under Heat Stress Conditions In The Terai Region Of Nepal, Radhakrishna Bhandari, Binod Panthi, Shivalal Nyaupane, Sandesh Shrestha, Prabin Sharma, Rajesh Kumar Gupta, Sansar Sahani, Mukti Ram Poudel

Makara Journal of Science

Wheat is one of the most important cereal crops worldwide, but the production and productivity of wheat is affected by heat stress. A field experiment using an alpha lattice design with seven blocks was conducted on 35 elite wheat genotypes in the Terai region of Nepal to identify the most appropriate trait resulting in a high-yielding wheat genotype with high tolerance to heat stress. Correlation analysis revealed that booting-to-heading duration (BtoH), booting-to-anthesis duration (BtoA), plant height (Ph), spike length (SL), spike weight (SW), thousand grain weight (TGW), straw yield (SY), and total biomass yield (TY) had a significant positive correlation …

L-Phenylalanine And Trans-Cinnamic Acid Combined With Fe3o4-Nps Treatment Induce Oxidative Stress And Enhances Alkaloid Production In Narcissus Tazetta L. By Increasing Pal And N4omt Gene Expression, Ladan Bayat, Azra Saboora, Ezat Asgarani, Mahboobeh Zarrabi

Turkish Journal of Botany

The medicinal properties of narcissus plants are attributed to the presence of Amaryllidaceae alkaloids. Elicitors, such as nanoparticles, are employed to enhance the production of secondary metabolites through signaling and the generation of reactive oxygen species. We investigated the effects of Fe3 O4 nanoparticles (Fe3 O4 -NPs), trans-cinnamic acid (tCA), and L-phenylalanine (L-Phe) precursors on various physiological and biochemical parameters in Narcissus tazetta L., with a particular focus on alkaloid content. Fe3 O4 - NPs treatment significantly increased photosynthetic pigments, secondary metabolites (including alkaloids, phenolic compounds), total soluble carbohydrates, and polysaccharides. The activities of antioxidant enzymes (SOD, CAT, POD), phenylalanine …

Genome-Wide Identification, Phylogeny, And Pharmacological Analysis Of Date Palm Cyclic Nucleotide-Gated Ion Channel (Cngc) Gene Family In Response To Fungi, Mumtaz Ali̇ Saand, Marina Memon, Ameer Ahmed Mi̇rbahar, Qurban Ali̇ Magsi, Athar Abbas Babar, Sahib Abbas Ghanghro

Turkish Journal of Botany

Cyclic nucleotide-gated ion channel (CNGC) is one of the important calcium conducting channels and involves in numerous biological functions such as plant development, phytohormone responses, plant-pathogen interactions. Nevertheless, identification of CNGC gene family has yet not been carried out in date palm crop. In this study, genome-wide identification, and pharmacological analysis of date CNGCs was conducted against fungal pathogens. The 26 PdCNGC genes were identified by using extensive bioinformatics tools. Gene ontology (GO) analysis showed that signal transduction, transmembrane transport and ion binding proteins were at the top in biological process and molecular functions of PdCNGCs. Protein-protein interaction of PdCNGCs …

Gamma-Aminobutyric Acid Induction Of Triticale Protective Systems Under Drought, Salt Stress Or A Combination Of The Two, Yuriy Kolupaev, Ivan V. Shakhov, Alexander I. Kokorev, Liana I. Relina, Alla I. Dyachenko, Alexander P. Dmitriev

Turkish Journal of Botany

Gamma-aminobutyric acid (GABA) is currently considered to be an important stress metabolite with regulatory functions in plants. Exogenous GABA is known to be able to enhance the tolerance of different plant species to drought and salt stress. However, its effects on the functioning of stress-protective systems in triticale, an intergeneric wheat-rye hybrid with specific adaptation strategies to abiotic stresses, remained completely unstudied. We studied the effects of exogenous GABA (0.5 mM) on the growth as well as on the antioxidant and osmoprotective systems of triticale seedlings (cv. 'Rarytet') under simulated drought (15% PEG 6000), salt stress (100 mM NaCl), or …

Pollination Is A Major Driver Of Germination In Comanthera Bisulcata And May Improve Everlasting Flowers (Sempre-Vivas) Conservation In Brazilian Campos Rupestres, Maria Luiza De Azevedo, Maria Neudes De Sousa Oliveira, André Rodrigo Rech, Gudryan Jackson Baronio, Jose Carlos Barbosa Dos Santos, Evandro Luiz Mendonca Machado, Israel Marinho Pereira, Eric Bastos Gorgens

Turkish Journal of Botany

The campos rupestres, ecosystems that are both unique and highly diverse, are home to a variety of endemic species, including Comanthera bisulcata (Eriocaulaceae). This species, of economic importance, has its inflorescences used in handicrafts due to the fact that they retain the appearance of living structures even after being harvested and dried. The trade of these inflorescences depends almost exclusively on extraction, an activity of great importance for the traditional communities of the Espinhaço Meridional municipalities, in Minas Gerais. However, research is essential to improve the management of this native species. In this study, we highlight the importance of pollination …

A New Species Of Nigrospora (Apiosporaceae) In Corylus Heterophylla In China, Jing Wang, Zhong-Xuan Liu, Wei Yu, Chao Kang, Yi Hua Yang

Turkish Journal of Botany

Corylus heterophylla, the majestic hazelnut tree, stands as one of the esteemed quartet of grand nuts reigning across the landscapes of temperate Asia, Europe, and North America. But its relationship with endophytic fungi remains thinly explored. This study successfully identified a new species designated as Nigrospora coryli through conjoint analysis of morphology and systematics. The genetic regions examined encompassed ITS, TUB2, and TEF1-α.The detailed morphological description, colour photographs of Macro- and microcharacters are presented.

Climate Smart Agriculture, J. David Aiken

Cornhusker Economics

There are several programs encouraging producers to reduce their carbon intensity, including United States Department of Agriculture climate-smart agriculture programs, the 2024 Nebraska Climate Action Plan, and the 2024 Nitrogen Reduction Incentive Act. The hope is that producers with lower carbon intensity (CI) scores will receive a premium for their products. Producers would be well advised to learn more about these programs, as reducing carbon intensity in agriculture seems to be an emerging agricultural policy trend that will be with us for some time to come.

Development Of Intensive Grassland Systems: From Science To Practice, D G. Mccall, G W. Sheath

IGC Proceedings (1977-2023)

Level of nnimal production from grassland is determined by the amount of pasture grown, pasture utilisation and animal conversion efficiency. The key components affecting production are pasture growth and animal conversion efficiency. These arc mainly influenced by environment, genetics and through inputs to maintain soil fertility or animal health. Systems development aims to link pasture growth and animal conversion through efficient strategies for pasture utilisation. The means of influencing pasture utilisation is through adjustments to animal feed demand, feed supply or grazing management. Stock policies that adjust the pattern and level of feed demand are of greatest significance in developing …

The Ecology Of Grazing Management, R K. Heitschmidt

IGC Proceedings (1977-2023)

The broad objective of this paper is to review the fundamental principles of grazing management as a means of assessing the inherent value of intensive and extensive grazing systems. Conceptual analyses of intensive and extensive grazing systems reveal that the fundamental differences between intensive and extensive grazing systems are related to differences in non-grazing rather than grazing tactics. Intensive grazing systems employ a wide array of non-grazing tactics in an attempt to overcome the inherent ecological constraints that limit secondary (i.e., livestock) productivity in extensively grazed systems. Moreover, analyses of the ecological or true efficiency of various agricultural production systems …