Herbicide Management Articles
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Local advice on managing blackgrass
Blackgrass is a weed that troubles many, and controlling it is an increasing challenge, particularly with the small armoury of products available, and the growing issue with resistance. Paul Drinkwater, Crop Production Manager for Abbots Ripton Farming Company, explains how, in his 40 years of being in the Cambridgeshire area, the blackgrass problem has evolved. “My role sees me manage ...
By Certis UK
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Maximising herbicide efficiency - Case Study
The most important component in achieving an effective and efficient spray solution will always be the water source, so in hard water areas, using a good quality water conditioner is essential to prevent chemical breakdown and maximise herbicide performance. Around the country water can range from soft to hard and its pH can also vary depending on location. From Yorkshire down to the south coast ...
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Organic Soil for Healthy Crops and Gardens, Black Worm Castings, Vermaplex
Creating a healthy organic garden is easier than you think. It all starts with the soil. As a gardener or farmer your goal is healthy plants that yield plentiful of flowers, fruits and vegetables. Your first priority should be the soil, it is the key ingredient to a thriving garden. Plants receive their nutrients from the soil. They are dependent on a soil full of microorganisms such as ...
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Giant black-grass requires lock stock approach
Nigel Riches, Arable Technical Specialist for Certis, explains what he’s been seeing in the field. “Black-grass is a problem that in the past has generally been confined to the main arable areas, in the east of the country. “But increasingly we’re seeing this pernicious weed spreading further west each season. Where previously black-grass has not been a big issue in the ...
By Certis UK
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Global transcriptomic profiling in barramundi Lates calcarcifer from rivers impacted by differing agricultural land‐uses
Most catchments discharging into the Great Barrier Reef (GBR) lagoon have elevated loads of suspended sediment, nutrients, and pesticides, including photosystem II inhibiting herbicides, associated with upstream agricultural land use. To investigate potential impacts of declining water quality on fish physiology, RNASeq was used to characterize and compare the hepatic transcriptomes of ...
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Potential risks to freshwater aquatic organisms following a silvicultural application of herbicides in Oregon's Coast Range
Glyphosate, aminomethylphosphonic acid (AMPA), imazapyr, sulfometuron methyl (SMM), and metsulfuron methyl (MSM) were measured in streamwater collected during and after a routine application of herbicides to a forestry site in Oregon's Coast Range. Samples were collected at three stations: HIGH at the fish/no‐fish interface in the middle of the harvest/spray unit; MID at the bottom of the ...
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Glyphosate and AMPA chronic risk assessment for soil biota
Glyphosate is a broad‐spectrum herbicide used widely in agriculture, horticulture, private gardens and in public infrastructure, where it is applied to areas such as road sides, railway tracks and parks to control the growth of weeds. The exposure risk from glyphosate and the primary soil metabolite aminomethylphosphonic acid (AMPA) on representative species of earthworms, springtails, ...
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Interactive effects of temperature and glyphosate on the behavior of blue ridge two‐lined salamanders, Eurycea wilderae
The objective of the present study was to evaluate the potential interactive effects of stream temperatures and environmentally relevant glyphosate‐based herbicide concentrations on movement and anti‐predator behaviors of larval Eurycea wilderae (Blue Ridge two‐lined salamander). Larval salamanders were exposed to one of four environmentally relevant glyphosate concentrations (0.00 µg a.e./L, ...
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The influence of reduced light intensity on the response of benthic diatoms to herbicide exposure
Herbicide pollution events in aquatic ecosystems often co‐occur with increased turbidity and reduced light intensity. It is therefore important to determine whether reduced light intensity can influence herbicide toxicity, especially to primary producers such as benthic diatoms. Benthic diatoms collected from four rivers were exposed to herbicides in 48 h rapid toxicity tests under high light ...
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Plant Sciences in Agriculture
Plant pathogens Microorganisms, also called as microbes, live in every part of the biosphere, including soil, water, and air. Plant pathogens are the microbes that infect plants and cause diseases. In history, some plant diseases led to tremendous negative impacts on society. In 1845, potato blight disease was prevalent in all potato growing regions in Ireland. Phytophthora infestans, a fungus, ...
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EPA Replies in Support of its Motion for Voluntary Vacatur and Remand
On December 17, 2015, in the U.S. Court of Appeals for the Ninth Circuit Case Nos. 14-73353, et al. (consolidated), the U.S. Environmental Protection Agency (EPA) filed a reply in support of its motion for voluntary vacatur and remand of its decision granting a registration to intervenor DowAgroSciences LLC (DowAgro) for Enlist Duo herbicide under the Federal Insecticide, Fungicide, and ...
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Tracking Your Data In All Your Unusual Places
Let’s be honest: I say “level measurement,” you think “fluid in a tank.” It’s ok; most people do. And if we’re really honest with each other, you can admit that you probably were thinking about an industrial tank, related to factory production of some kind. And again, it’s ok. But there’s so much more to level measurement! One of fastest ...
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Recovery of Terrestrial Plants in Vegetative Vigor and Seedling Emergence Tests from Exposure to Atrazine
Ten species of terrestrial plants, including six dicotyledonous and four monocotyledonous species, were exposed to a direct overspray of atrazine according to U.S. EPA seedling emergence and vegetative vigor study guidelines and subsequently evaluated for potential recovery. For each species, NOER, ER10, ER25, and ER50 values were calculated (where possible) for a variety of guideline required ...
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Environmental Groups File Opening Briefs Challenging EPA’s Decision to Register Enlist Duo
On October 23, 2015, in the U.S. Court of Appeals for the Ninth Circuit, the Natural Resources Defense Council (NRDC) and other environmental groups including the Center for Food Safety (CFS, et al.) (together, Petitioners) filed separate opening briefs in Case Nos. 14-73353 and 14-73359 (consolidated) arguing that the U.S. Environmental Protection Agency’s (EPA) decision to register Dow ...
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Impacts of 2,4‐D aquatic herbicide formulations on reproduction and development of the fathead minnow (Pimephales promelas)
The authors studied the effects of two 2,4‐Dichlorophenoxyacetic acid, dimethylamine salt (2,4‐D) herbicide formulations on fathead minnow reproduction, embryonic development, and larval survival. Groups of reproductively mature fathead minnows were exposed for 28 days to 0.00, 0.05, 0.50, and 2.00 ppm 2,4‐D (target), in a flow‐through system. Weedestroy® AM40 significantly (p < 0.05) ...
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Field degradation of aminopyralid and clopyralid and microbial community response to application in Alaskan soils
High latitude regions experience unique conditions that affect the degradation rate of agrochemicals in the environment. In this study, data collected from two field sites in Alaska (Palmer and Delta) were used to generate a kinetic model for aminopyralid and clopyralid degradation and to describe the microbial community response to herbicide exposure. Field plots were sprayed with herbicides ...
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Adsorption and degradation of phenoxyalkanoic acid herbicides in soils: A review
The primary aim of this review on the phenoxyalkanoic acid herbicides (2,4‐D, MCPA, dichlorprop‐P, mecoprop‐P, 2,4‐DB and MCPB) was to compare the extent of their adsorption in soils and degradation rates to assess their potential for groundwater contamination. We found that adsorption decreased in the sequence 2,4‐DB > 2,4‐D > MCPA > dichlorprop‐P > mecoprop‐P. Herbicides are predominantly ...
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Ninth Circuit Denies Requests to Stay Use of Enlist Duo Herbicide During Judicial Review
On August 11, 2015, the U.S. Court of Appeals for the Ninth Circuit denied a motion for a stay pending review filed on December 18, 2014, by the Natural Resources Defense Council (NRDC), as well as a subsequent stay motion filed on February 6, 2015, by the Center for Food Safety and other petitioners (Case Nos. 14-73353 and 14-73359, consolidated). Both motions requested that the court stay an ...
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The role of a hybrid phytosystem in landscape water purification and herbicides removal
The performance of a hybrid phytosystem in landscape water purification and herbicides removal was investigated. The phytosystem operating in an arboretum is located in the Minhang Campus of Shanghai Jiao Tong University, China. The phytosystem is composed of two purification stages: sedimentation Stage 1 without external air supply; and Stage 2 with an external air supply. Stage 2 is also ...
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An Automated Extraction Solution for Imidazolinone Herbicides
Abstract Imidazolinone herbicides are a family of five compounds including: Imazapyr, Imazapic, Imazethapyr, Imazamox, and Imazaquin. These herbicides are used to control a wide range of broadleaf weeds, by inhibiting the Acetohydroxy Acid Synthesis (AHAS), which is the first common enzyme in the biosynthesis of branched chain amino acids. In this study, the performance and versatility of the ...
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