Articles tagged with Weeds
A large-scale study is proposed to test the efficacy of strategies for preventing pesticide resistance in critical weed and insect species. The authors recommend providing resources for landscape-level studies and incentives for farmers to participate, highlighting the need for a multi-faceted approach to addressing this pressing issue.
A new study reveals that optimal timing of cultural management techniques such as careful rotary hoeing, delayed planting, and diverse crop rotations can significantly impact organic weed control. By reducing weed emergence and promoting soil fertility, these methods help crops become more competitive against weeds.
New research from the University of Adelaide shows that weedy marine plants will dominate coastal habitats in high CO2 conditions, replacing kelp forests that support higher biodiversity. Small weedlike species will fuel their growth due to carbon emissions, allowing them to outcompete and outgrow kelps.
A study published in Scientific Reports found that focusing solely on a species' rarity or economic impact can lead to an underestimation of its true value. Considering multiple values, such as cultural significance and economic importance, reveals that every species plays a crucial role in society.
Researchers aim to develop a new type of weed control system using genetic modification techniques. The goal is to introduce specific genetic controls that could change the sex ratio of waterhemp and Palmer amaranth populations, leading to population crashes.
Scientists found that common ragweed can drastically reduce soybean yield by 76% in some cases, highlighting its potential threat to soybean production. The study suggests that early detection of weed growth is crucial to predict crop yield losses and inform pesticide application decisions.
Kansas State University researchers found that pigweeds develop resistance to glyphosate by carrying hundreds of copies of the target gene in circular DNA structures. The team's discovery has implications for sustainable agriculture and strategies to negate resistance.
A University of Illinois study found that early-killed cereal rye reduces weed density by 20% and suppresses early-season weed growth by 85%. The cover crop management system also promotes easy edamame emergence, which is notoriously challenging for the soybean variety.
Drake Copeland's study suggests Palmer amaranth may be developing greater tolerance to herbicides, making it harder to control. The initial findings also indicate that PPO-resistant and susceptible biotypes respond differently to Group 15 herbicides.
Two University of Tennessee scientists, Thomas Mueller and Larry Steckel, received top honors from the Weed Science Society of America for their peer-reviewed articles on weed control and dicamba persistence. Their studies provide valuable insights into agricultural spray hoses and cover crops as a weed management tool.
Researchers have made a breakthrough in understanding how penoxsulam works to control weeds, which could lead to the development of new, safe herbicides. The study found that penoxsulam combines with an enzyme in the weed and prevents it from producing amino acids.
Researchers from the University of Sheffield have identified key drivers of herbicide resistance in crops, including higher volumes of herbicide use. The study found that farms using more herbicides had greater resistance, highlighting the need for diversifying management techniques to reduce evolution of resistance.
A nationwide study found that black-grass populations in England have evolved resistance to herbicides, leading to increased costs and lower crop yields. The research team recommends adopting weed-management strategies that rely less on chemicals.
Researchers at Cambridge University Press suggest a way to predict invasive weed behavior and development curve by analyzing herbarium records and data on past invaders. By understanding the variation in expansion phase length across species, they can identify traits linked to aggressive growth and expansion.
Robotic weeders are being increasingly adopted by farmers due to their ability to efficiently control weeds in specialty crops like lettuce, broccoli, and tomatoes. While they have limitations, the technology is improving with advancements in programming and sensor technology.
Researchers discovered effective weed control methods using EPTC, flumioxazin and napropamide to manage yellow nutsedge and black medic in winter strawberry crops. However, none of the studied herbicides adequately suppressed Carolina geranium, with halosulfuron causing significant injury to strawberry plants.
The European Union has approved the renewal of glyphosate for five years, recognizing its importance in maintaining food production and affordability. However, experts emphasize the need to balance this decision with reducing pesticide use and finding alternative weed control methods.
The USDA has announced grants to support integrated pest management (IPM) projects, aiming to increase production and ensure food security. These projects focus on developing safer, more effective pest management approaches for various crops, including fruits, vegetables, tree nuts, and nursery crops.
Researchers at Michigan State University have discovered a new concept called 'drift robustness', where small populations evolve to protect themselves from harmful mutations. This adaptation allows them to survive and thrive in environments where larger populations would struggle.
Weeds like common waterhemp and Palmer amaranth can reduce corn and soybean yields by up to 80%, while resistant weeds are developing resistance to available herbicides. To combat this, researchers suggest diversifying weed management practices with crop rotation, weed suppressive cultivars, and other tactics.
Researchers found that preemergence weed control in fall or early February is crucial to address kochia emergence and seed production. Effective methods include cover crops, tillage, and stale seedbed techniques.
Researchers found cereal rye consistently reduced Amaranthus spp. weed density, even without herbicides. Cereal rye has potential to control weeds by reducing population density within the first month of planting, potentially reducing selection for resistant weeds.
A study found that total weed density was greatest when soil was tilled early in the growing season, while late-season tillage resulted in fewer weeds. This suggests that adjusting tillage timing can improve weed management and crop yields.
Research reveals Palmer amaranth life history traits influence its growth and reproduction in various cropping systems. Crop rotation and canopy better explain trait differences.
Scientists at the University of Bonn have created a robotic system that uses short laser pulses to weaken weed vitality, eliminating the need for herbicides. The innovative technology has the potential to transform the field of sustainable agriculture.
A new assay developed by University of Illinois researchers can identify Palmer amaranth DNA in mixed seed samples, overcoming slow and unreliable testing methods. The low-cost technique uses quantitative PCR to detect genetic variations unique to Palmer, enabling farmers to certify their product as Palmer-free.
Researchers explored three organic methods to suppress weeds: using cover crops instead of disks, turning them under, or flatening with a crimper. While some found cover crops to be effective in reducing weeds, the team also noted that unexpected weather conditions and soil fertility issues impacted results.
A recent study has discovered the ancestry of Asian rice and its weedy cousins, revealing that rice has a natural tendency towards becoming weeds. The research found that both strains evolved from different crop varieties, with relatively few changes needed to turn the crop plant into a weed.
Researchers found that letting cover crops grow longer produces the best results in suppressing weeds while also retaining soil moisture. The optimal timing is crucial, as over-flattening can lead to unwanted seed production, while under-flattening may regrow the cover crop.
Researchers found that snap bean yields were not significantly affected by no-till cover crops, despite the benefits of weed suppression. The study suggests that timing and management techniques are crucial for successful integration of cover crops into vegetable production systems.
Researchers from UT Institute of Agriculture won the Outstanding Paper Award in Weed Technology for their study on cover crops and herbicides. The study found that combinations of grass and legume cover crops provided effective control over glyphosate-resistant Palmer Amaranth, with cereal rye and wheat showing the best results.
A new MSU study found significant yield gaps between alternative agricultural practices in small experimental plots and commercial fields. The research highlights the challenges of scaling up low-input and organic farming methods to achieve similar yields as conventional practices.
Researchers at the University of Illinois have found that pollinator habitat seed mixes sold by companies in the Midwest contain seeds of Palmer amaranth and other invasive weeds. The USDA does not license or inspect these seed companies, leading to the unintended introduction of these weeds to thousands of acres of land.
A study by Cornell University researchers suggests that certain weeds, like milkweed, can be beneficial to crops and the environment. By incorporating these weeds into agricultural systems, farmers may reduce their reliance on pesticides and herbicides, while also supporting biodiversity and pollinator health.
Researchers have developed an algorithm to detect fake reviews on ecommerce sites, analyzing behavior and content features to identify deceptive posters. The method outperforms earlier detection algorithms, providing a more accurate picture of product ratings.
Researchers have found that snotty gobble can kill gorse, blackberry, and Scotch broom without damaging native shrubs. The study suggests snotty gobble could be an effective native biocontrol agent for major invasive shrubs in Australia.
The University of Tennessee Weed Diagnostics Center provides a range of services, including basic weed identification and DNA-based herbicide resistance testing. The center aims to help users implement optimal management strategies to keep weeds under control and conserve resources.
In Botswana, scientists have successfully controlled invasive aquatic weeds like salvinia, water lettuce, and water hyacinth through biocontrol and legislation. The country's efforts have improved water resource use, wildlife conservation, and tourism, contributing 25% to GDP.
A study has determined that anaerobic soil disinfestation (ASD) is an effective and sustainable method for controlling weeds and nematodes in fresh-market tomatoes. ASD was found to provide comparable or higher fruit quality and mineral content compared to traditional chemical soil fumigation methods.
Scientists discovered that aquatic ferns' hairy leaves can selectively absorb oil while repelling water. They developed a synthetic version of these hairy surfaces called 'nanofur', which is superhydrophobic and superoleophilic.
Researchers found that tembotrione and other HPPD-inhibiting herbicides provided comparable control to atrazine, with crop yields also comparable. In Oregon fields, several alternative treatments worked well, but limitations were noted in Midwest regions.
A new technique using 'smokewater' has been found to disrupt dormancy in blackgrass seeds, making them vulnerable to herbicides. The method could help reduce crop losses due to weed growth, which is expected to increase with climate change.
Researchers compared bioplastics with biofabrics, finding that biofabrics increased soil moisture and suppressed weed emergence. Biofabrics also showed better durability and decomposition properties than bioplastics.
A recent University of Illinois study found that waterhemp populations in the Midwest are resistant to multiple classes of herbicides, including HPPD-inhibitors and ALS-inhibitors. Researchers recommend using integrated pest management strategies, such as mechanical soil preparation and seed control, to reduce resistance.
A study evaluated organic trailing blackberry production practices, recommending weed mat management to increase production and profits. Soil pH, organic matter content, and macronutrient concentrations were affected mainly by year and weed management strategy.
PPO herbicides show improved performance when applied at noon, outperforming early morning and late evening applications by 15-20% and 10%, respectively. This timing affects weed control in glyphosate-tolerant soybeans.
A University of Illinois study explores effective weed management in commercial edamame production, revealing that integrated tactics and specific herbicide combinations can increase marketable pod yield. Gardensoy 43 cultivar showed promise as a competitive option, reducing weed biomass by 29 percent.
New research reveals Palmer amaranth can cause significant soybean yield loss in Illinois, up to 30% in short periods, highlighting the need for early detection and management strategies.
Weed blasting, a new control method for organic farmers, has been shown to be surprisingly effective in reducing final weed biomass by 69-97% compared to non-weeded control plots. The method involves blasting weed seedlings with tiny fragments of organic grit using an air compressor.
Researchers from Wake Forest Baptist Medical Center reviewed the scientific evidence for top-selling over-the-counter dietary supplements sold to improve male sexual health. While some natural supplements show promise, they lack robust human evidence and can be pure or weak.
Scientists evaluated nine spring and six fall crop cultivars for suitability as baby-leaf salad greens in the Pacific Northwest. Pak choi 'Joi Choi' and Mustard 'Komatsuna' showed high marketable weight, quick harvest time, and good weed competitiveness.
The Bill & Melinda Gates Foundation approved $1.5 million funding for King Abdullah University of Science and Technology (KAUST) to combat Striga hermonthica, a destructive parasitic weed in sub-Saharan Africa. The research aims to enhance food security for millions by providing lifesaving control methods.
The US Department of Agriculture has funded a three-year study to make organic rice production more economically viable for farmers. The research aims to address key challenges such as weed control, nitrogen supply, and stand establishment, which are major issues affecting organic rice farming.
A five-year study found that tillage timing significantly impacts nitrogen availability and loss in organic farming systems. The researchers discovered that fall tillage followed by a period of fallow led to vulnerable bursts of nitrogen that were susceptible to leaching.
Researchers identified the earliest example of small-scale cultivation in the world at a 23,000-year-old site in the Galilee. The team found evidence of repeated sowing and harvesting of domesticated cereals, including wheat and barley, as well as proto-weeds that grew alongside them.
Researchers from Tel Aviv University and international partners uncover proof of trial plant cultivation 11 millennia earlier than conventional ideas suggest. The study reveals early humans had gathered over 140 species of plants, including weeds mixed with edible cereals, indicating basic knowledge of agriculture and foresight.
Researchers found sandwich systems, combining living mulch with modified tillage, improve soil conditions, decrease pests, and increase biodiversity. The system showed the most promise by eliminating vegetative cover competition and increasing soil respiration.
Farmers using multiple herbicides per application (83 times less likely to have resistance) and rotating herbicide mixing are the most effective tools in managing herbicide resistance. Management factors, not environmental or landscape variables, play a crucial role in preventing resistance.
A US research team has identified promising edamame lines for commercial production in the Midwest, with improvements needed to overcome challenges such as poor seed germination and emergence. The study suggests that edamame plants can grow quicker than grain-type soybean, but require shorter plant sizes for efficient mechanical harvest.
A traditional herb-derived remedy has been combined with two plants to create an antimalarial tea, which has been licensed and sold as a treatment for malaria in West Africa. The medication, derived from Cochlospermum planchonii, Phyllanthus amarus, and Cassia alata, was traditionally used to alleviate malarial symptoms.