Articles tagged with Weeds
Researchers found that glyphosate-resistant kochia has duplicated several EPSPS copies on a single chromosome, enabling it to survive higher doses of the herbicide. This increase in gene copies has created a nonsustainable way of controlling kochia with glyphosate-only programs.
Weed control in conventional farming methods has a negative impact on the environment. Research from the University of Copenhagen reveals that crops like corn, grains, and beans can suppress weed growth when sown in tighter grid patterns. This results in up to 72% reduction in weed biomass and a 45% increase in grain yields.
New research from The Ohio State University found that a combination of shredded newspaper and grass clippings is an effective mulch material, allowing squash bees to nest without negative impacts. This eco-friendly practice also improves plant growth and fruit production.
A recent study by an international team of researchers highlights the need for stricter regulations on invasive weed species in pastures. The findings suggest that these species can cause significant environmental harm and economic losses, with the US spending over $34 billion annually on management.
Weeds introduced to the UK centuries ago are still adapting and changing, with some species showing significant increases in leaf area and plant height. Researchers found that 70% of weeds in New South Wales have undergone substantial changes since introduction.
Researchers found that clove oil herbicide did not consistently improve weed control in organic Vidalia sweet onions. The study concluded that the herbicide was not effective enough to justify its expense due to issues with maintaining an emulsion and affecting onion yield.
Researchers found that the larvae of G. permixtana feed on Sagittaria trifolia, a new host plant in northern Iran, reducing arrowhead weed germination potential and providing an alternative solution for biological control.
Researchers report Palmer amaranth is invading Illinois fields, reducing soybean yields by 78% and corn yields by 91%. The plant's rapid growth and resistance to common herbicides make control challenging. Illinois farmers must take action before the weed takes over.
A new study found that pelargonic acid is an effective natural herbicide for controlling weeds in yellow squash, with minimal crop injury. The 10-lb/acre PA treatment produced the highest squash yields and fruit number compared to other application rates.
Researchers discovered specific soil microbes that hinder the growth of ragweed, a common weed in eastern US. By using plants that attract these microorganisms, farmers may be able to create 'weed-suppressive soils' and reduce weed growth.
A study published in Agricultural Systems found that planting cover crops increases eight of eleven ecosystem services, including carbon and nitrogen retention, erosion prevention, and weed suppression. The research highlights the importance of considering temporal dynamics when assessing management system effects on ecosystem services.
A team of scientists from Australia and Panama examined the reproductive mechanisms of Saccharum spontaneum to develop better management strategies. The study found that cutting stems into smaller pieces can help prevent flowering and seed dispersal, while timing management actions during specific seasons can also be effective.
A new offset round-bale unroller design has been deemed effective in making mulching more efficient, particularly with organic mulches. The technology allows for better between-row weed control and can be used with various types of mulches.
Research finds that horse manure disperses non-native weed seeds, including 16 noxious weeds in Australia and 105 invasive species in North America. Habitat disturbance from trampling also facilitates seed germination.
Researchers found that modifying rice crops to resist herbicide triggers gives weedy neighbors a fitness boost, enabling them to grow faster and produce more offspring. The study suggests this method could be used to enhance crop yields, but raises concerns about potential problems with weedy relatives.
A study published in HortScience found that flame cultivation can be a promising alternative to traditional weed control methods for cranberries. The method was tested on three types of handheld propane torches and showed minor response differences between cranberry varieties.
Experts warn of spreading herbicide-resistant weed species, including Palmer amaranth pigweed, threatening farmers' crop yields. New herbicides with alternative modes of action and residual activity are being developed to help manage resistant weeds.
Researchers suggest that extreme events like tropical storms and cloudy weather can trigger coral regrowth on degraded reefs. By adopting a more resilient management approach, it may be possible to restore living coral cover to these systems.
Evolutionary biologist Kenneth Olsen has examined the genetics of hull color in rice, finding that different mutations underlie the emergence of traits in both cultivated and weedy forms. The findings suggest that crops reverted to wild forms by reversing genetic changes, but with a more complex history than initially thought.
A new study has found that crabgrass produces chemicals that inhibit the growth of nearby staple crops like wheat, corn, and soybeans. The research, published in ACS' Journal of Agricultural and Food Chemistry, suggests that crabgrass is not just a nuisance but also a significant cause of crop loss on farms.
Researchers at the University of Illinois suggest reforming regulatory lists using a science-based process and assessing potential invasiveness. This could lead to better protection for natural areas against invasive species, but may not threaten the development of new biofuels crops.
Scientists assembled the transcriptome and genome of the noxious weed Brachypodium sylvaticum, providing insights into its invasive capabilities and adaptation to new environments. The study offers a model for studying ecological and evolutionary aspects of invasion.
A new regulatory methodology is proposed to improve the evaluation of invasive potential in biofuel feedstocks. The current method has a significant gap in protection against natural areas invasions, leading to massive financial effects.
A study by Washington State University finds that genetically modified crops have led to a 25% increase in herbicide use, driven by the emergence of glyphosate-resistant weeds. The annual herbicide usage has grown from 1.5 million pounds in 1999 to 90 million pounds in 2011.
A Purdue University study found that soil microbes can affect how glyphosate affects plants, potentially making resistant weeds more resistant to disease pressure. This discovery challenges existing understanding of glyphosate resistance and highlights the importance of considering soil microbes in weed management.
UC Santa Barbara scientists have found that the tamarisk leaf beetle has evolved to delay its entry into hibernation, allowing it to survive and reproduce in the southern US. This adaptation enables the beetle to effectively control the invasive tamarisk plant, providing a cost-effective solution for containing the weed.
The use of old herbicides is increasing due to emerging weed resistance, prompting companies to develop new crop varieties with resistance to these chemicals. This shift aims to maintain control over weeds while reducing the reliance on chemical herbicides.
Researchers at UOG are using classical biological control with Puccinia spegazzinii to combat the aggressive climbing vine, which threatens plant biodiversity on Pacific islands. The rust fungus is highly damaging to Mikania's leaves, petioles, and stems, eliminating the need for toxic herbicides.
Increased use of glyphosate-type herbicides has led to a dramatic increase in genetically-resistant weeds, according to Penn State researchers. Integrated weed management programs, including planting cover crops and using mechanical control methods, can lower herbicide use by up to 94% while maintaining profit margins.
A new study published in HortScience finds that the Ridge-Furrow-Ridge Rainwater Harvesting (RFRRH) system with mulches increases soil water content, crop yield, and reduces labor costs. The system also manages weed control without irrigation.
A new study by Italian scientists shows that biodegradable mulches can effectively control weeds in container-grown arborvitae, with results comparable to chemical herbicides. The researchers found no impact on substrate temperature or water content, and noted that transpiration is the main component of water loss from these plants.
A team of researchers led by Dean Riechers proposes using tank-mixing auxinic herbicides with glyphosate as a short-term solution to combat growing herbicide resistance. The approach aims to broaden the spectrum and postemergence weed control, particularly in corn, soybean, and cotton crops.
Biotech has added billions to farmers' incomes globally, with the four main crops of soybeans, corn, cotton, and canola experiencing significant increases. The study found that biotech benefits were particularly pronounced in developing countries, with GM insect-resistant cotton and herbicide-tolerant soybeans driving these gains.
A USDA aerial photography survey found that the invasive leafy spurge weed is displacing native mountain big sagebrush seedlings in Idaho. The survey used high-resolution digital cameras to sample large areas of the western US.
Researchers found that ground beetles significantly reduce grass weed populations in UK farmland, improving agricultural productivity. By controlling weeds, ground beetles can help farmers reduce herbicide use and increase crop yields.
A study published in the Nature journal Scientific Reports found that many tea and herbal products contain unlisted ingredients, including weeds and plants from various families. The research used DNA barcoding technology to identify unknown species in 70 tea products and 60 herbal products, revealing a total of 25 unexpected ingredients.
Scientists from LMU Munich have developed a concise and efficient method for synthesizing the alkaloid loline and related compounds. The new approach enables the production of these compounds in sufficient quantities to investigate their various aspects, including their interactions with insects and bacteria.
Researchers found that resistant horseweed has a pump in the tonoplast membrane that actively moves glyphosate into the vacuole, making it unavailable for translocation. Sensitive plants can't keep up with this rapid shuttle of glyphosate, allowing them to be killed by the herbicide.
A Purdue University study finds that climate change allows yellow starthistle to outcompete native species, leading to economic and ecological damage. As carbon dioxide levels rise, the invasive weed grows up to six times its normal size, while native grassland species remain relatively unchanged.
A study by ecologists at the University of Texas at Austin found that a lawn of regionally native grasses requires less maintenance than traditional turfgrass, providing a lush carpet while outperforming it in weed resistance. The new approach could have a significant impact on pocketbooks and the environment.
Researchers tested corn gluten meal on direct-seeded squash and found that banded applications increased crop safety and yields. The study suggests that CGM can be a safe alternative to traditional herbicides for organic vegetable production.
Researchers are examining a cropping system using molasses to stimulate microbial activity, which could replace the fumigant methyl bromide. The study also explores recently developed fumigants dimethyl disulfide and methyl iodide.
The AgroAtlas project aims to promote world food security in Newly Independent States-countries by providing a geographic distribution of crops, diseases, pests, and wild relatives. The interactive website shows the distributions of 100 crops, 640 crop diseases, and 560 wild crop relatives growing in Russia and neighboring countries.
A new study finds that weed-eating fish like parrotfish and surgeonfish can only keep coral reefs clear of weeds before they take over. Beyond a certain density, the fish no longer control the weeds, allowing the corals to be lost.
Reduced tillage can increase weed populations, particularly perennial species like Canada thistle and bindweed, which are difficult to control. Integrated systems that include on-site or locally sourced manure can improve the economics of organic production.
Researchers confirm waterhemp's first evolution of resistance to HPPD-inhibiting herbicides, requiring a more integrated approach to management. The development of new options and changing practices are needed to combat the increasing threat of multiple-herbicide resistant weed populations.
Researchers at Dow AgroSciences and the University of Missouri have engineered soybean plants that can tolerate an alternative herbicide called 2,4-D, which may help slow the spread of superweeds. This new approach could reduce the need for multiple herbicides and lead to cost savings for farmers and consumers.
Researchers found that approximately 44% of fields demonstrate rapid atrazine degradation activity due to recent use, soil pH, and organic matter content. Growers can predict enhanced degradation with multiple atrazine applications and high soil pH above 6.3.
A recent University of Illinois study shows that sweet corn can be grown successfully with reduced atrazine use, but may not often be able to do so. The study found that weed control falls apart quickly when atrazine is removed, increasing the risk of yield losses.
Research found that several herbicides used on corn are safe for Miscanthus x giganteus, a potential bioenergy feedstock. This discovery offers growers hope in managing weeds without harming the crop's yield and growth.
Researchers have found that paper mulches can be an effective alternative to traditional polyethylene mulches in commercial vegetable production. Four types of paper mulches were compared with black plastic mulch and found to control weeds as well as or better than polyethylene in some situations.
A US-based lab is searching for natural enemies of the invasive silverleaf nightshade weed, which can outcompete native plants and poison livestock. The lab aims to use biologically based approach to control the weed's spread in Europe and the US.
Research by USDA scientists found that winter canola can be used to control weeds, supplement animal feed and produce biodiesel. This has encouraged wheat farmers in Okanogan County to diversify their market options and align with USDA's priority of developing new sources of bioenergy.
Researchers have identified a natural substance in a fungus that infects a common weed, showing potential as the first stinkbug repellent. The substance repelled up to 90% of stinkbugs and was almost twice as effective as naphthalene, a gold-standard for measuring insect repellents.
A new species of beetle, Himalusa thailandensis, has been found to feed on the invasive skunk vine, causing significant foliar damage. This discovery presents a potential biocontrol solution for controlling the spread of this invasive weed in the southern United States.
A five-year study found that one-time tillage did not negatively impact grain yield or soil structure in no-till crops. However, it may help manage perennial weeds and reduce phosphorus stratification. The researchers concluded that tilling should only be done to address specific problems, as it increases erosion risk.
The USDA has released a new biocontrol, Megamelus scutellaris, to help control the invasive water hyacinth. The planthopper is highly host-specific and does not pose a threat to native or economically important species.
Researchers at the University of Illinois have found Sudangrass to be an effective solution for controlling Canada thistle, with a 95% control rate in test plots. The smother crop can be mowed and left as a surface mulch or grazed, making it suitable for both organic and conventional farmers.
Atrazine is the single most widely used herbicide in sweet corn, accounting for only 9% of total weed management costs. The study found that phasing out atrazine would burden growers with particularly weedy fields and early season crop production.
A weed calculator developed by ARS scientist Matt Rinella predicts that eliminating leafy spurge and spotted knapweed could raise up to 200,000 cows a year in the western US. The calculator allows ranchers to estimate weeds' economic impact and make informed management decisions.