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Many farmers and home gardeners have reported damage to vegetable and flower crops after applying horse or livestock manure, compost, hay, or grass clippings to the soil. The symptoms reported include poor seed germination; death of young plants; twisted, cupped, and elongated leaves; misshapen fruit; and reduced yields. These symptoms can be caused by other factors, including diseases, insects, and herbicide drift. Another possibility for the source of these crop injuries should also be considered: the presence of certain herbicides in the manure, compost, hay, or grass clippings applied to the soil.
English ivy (Hedera helix) is a shade-tolerant, woody perennial vine. When established it creates a dense ground cover with attractive dark green foliage. But, left un-checked this introduced plant invades woodlands, climbs (and kills) trees and is considered an invasive species. Pursuing the internet you can find several “recommendations” for controlling English Ivy. Some good, some are questionable. This publication describes cultural and chemical control options.
Manual removal of weeds is time consuming, expensive, and often results in damage to landscape plants when intertwined roots of both the weed and the ornamental plant are pulled up. Nonselective herbicides (which must be selectively applied to avoid injury to desirable plants) are typically used for postemergence annual and perennial weed control. This publication covers choosing the right herbicide for this situation.
A quick guide providing commonly used herbicides used in forest site preparation and release treatments. Tables are broken into (1) conifer site preparation, (2) hardwood plantation site preparation, (3) hardwood natural regeneration site preparation, (4) conifer early release, (5) early hardwood release, (6) cut surface herbicides used for intermediate or crop tree release. Each table provides the herbicide active ingredient, trade names of labels approved for forestry applications, best time of year to use the herbicide, target species, and species that are resistant to the herbicide. The trade names are linked to the most recent specimen label so users may look up the details of that brand for safety, mixing, and delivery methods. The links use the CDMS database for specimen labels: http://www.cdms.net/Label-Database.
This appendix from the Extension Gardener Handbook will help readers to understand the impact of pesticides on our environment, know when to use a pesticide, how to read its label, and how to apply it safely and to understand the signal words and their associated levels of toxicity.
This publication discusses weeds common to watermelon and how to control them. Weed management strategies include mechanical control, cultural control, and herbicide recommendations for grasses and broadleaf weeds such as Palmer amaranth and sedge weed species.
General guidelines on how to conduct a bioassay for herbicide residues in soil.
This publication alerts prospective gardeners to some of the most common contaminants in urban soils, such as lead and other toxic metals, solvents, pesticides and total petroleum hydrocarbons. This will help minimize potential risks to gardeners and to those who consume garden produce. The document includes information regarding site characterization, common contaminants, soil testing, interpretation of results and strategies for reducing exposure risks.
This pesticide factsheet covers the use and characteristics of the herbicide, glyphosate.
This pesticide factsheet covers the use and characteristics of the preemergence herbicide Barricade, Prodiamine or Regalkade G (prodiamine).
This pesticide factsheet covers the use and characteristics of Dimension (dithiopyr).
This pesticide factsheet covers the use and characteristics of Sureguard (flumioxazin).
This pesticide factsheet covers the use and characteristics of Scythe (pelargonic acid) or Axxe (ammonium nonanoate).
This pesticide factsheet covers the use and characteristics of Casoron (dichlobenil).
Hand-applied herbicide technologies are varied and effective tools which allow the landowner to selectively control vegetation in a variety of circumstances. This publication discusses the advantages and disadvantages of hand-applied herbicides, as well as application methods.
This factsheet describes the symptoms of a glyphosate herbicide injury.
When it comes to weeds, “start clean – stay clean” should be the moto of every nursery manager. This is especially true for producers of herbaceous perennials. Although we can control most grassy weeds with postemergence herbicide; otherwise, we have few herbicides to use when weeds get out of hand. Furthermore, the herbicides labeled for use in herbaceous ornamentals are either safe on many ornamentals and do not control many weeds, or control lots of weeds but are safe on only a few ornamentals. Consequently, to manage weeds effectively a comprehensive nursery weed management program including exclusion, sanitation, preemergence herbicides, some postemergence herbicides and hand weeding will be needed.
This pesticide factsheet covers the use and characteristics of Marengo (indaziflam).
This pesticide factsheet covers the use and characteristics of Sedgehammer (halosulfuron).
This pesticide factsheet covers the use and characteristics of Reward (diquat dibromide).
This factsheet describes the symptoms of cellulose-inhibiting herbicide injuries.
This factsheet describes the symptoms of a photosystem I (PS I) inhibitor herbicide injury.
This pesticide factsheet covers the use and characteristics of Basagran T/O (bentazon).
This pesticide factsheet covers the use and characteristics of Tower (dimethenamid-p).
This factsheet describes the symptoms of a synthetic auxin (SA) herbicide injury.
This factsheet describes the symptoms of an ALS inhibitor herbicide injury.
This pesticide factsheet covers the use and characteristics of Goal and GoalTender (oxyfluorfen).
This factsheet describes the symptoms of a carotenoid pigment inhibitor herbicide injury.
This pesticide factsheet covers the use and characteristics of the preemergent herbicide Princep, Simazine (simazine).
This pesticide factsheet covers the use and characteristics of Gemini (isoxaben + prodiamine).
This factsheet describes the symptoms of root-inhibiting herbicide injuries.
This pesticide factsheet covers the use and characteristics of Gallery (isoxaben).
This factsheet describes the symptoms of a lipid biosynthesis (Acetyl CoA carboxylase or ACCase) inhibitor herbicide injury.
This factsheet describes the symptoms of a photosystem II (PS II) inhibitor herbicide injury.
This pesticide factsheet covers the use and characteristics of Pendulum, Aquacap, Corral (pendimethalin).
This pesticide factsheet covers the use and characteristics of Lontrel (clopyralid).
This factsheet describes the symptoms of a dichlobenil herbicide injury.
Immediately after a flood, most farmers, nursery crops producers and grounds maintenance staff have much more urgent matters to worry about than weeds. But, eventually the questions arise: Has my preemergence herbicide washed away? How do I know? Should I re-treat? What’s going to happen now? Unfortunately there is no way to provide definitive answers to these questions. But this publication offers some tips and suggestions that will help you plan a response.
This factsheet discusses ALS-inhibiting herbicide injury on soybean.
This pesticide factsheet covers the use and characteristics of Devrinol (napropamide).
This pesticide factsheet covers the use and characteristics of Finale XL or Cheetah Pro (glufosinate).
This pesticide factsheet covers the use and characteristics of Ornamental Herbicide II (oxyfluorfen + pendimethalin).
This factsheet describes the symptoms of a metribuzin herbicide injury.
This pesticide factsheet covers the use and characteristics of StriCore (pethoxamid).
This factsheet describes the symptoms of a shoot inhibitor herbicide injury.
This factsheet discusses HPPD and clomazine injury on soybean.
This pesticide factsheet covers the use and characteristics of Regal O-O (oxyfluorfen + oxadiazon).
This factsheet describes the symptoms of a protoporphyrinogen oxidase inhibitor herbicide injury.
This pesticide factsheet covers the use and characteristics of Envoy Plus (clethodim).
This table presents information on preemergence herbicides for herbaceous ornamentals.
Palmer amaranth is the most common and most troublesome weed in North Carolina sweetpotato. This publication discusses Palmer amaranth identification, reproduction and growth habit, impacts on sweetpotato yield and quality, and weed management options.
This factsheet discusses glyphosate injury on soybean.
This factsheet discusses glufosinate injury on soybean.
This factsheet discusses protoporphyrinogen oxidase (PPO)-inhibiting herbicide injury in soybean.
This pesticide factsheet covers the use and characteristics of Freehand (dimethenamid-p + pendimethalin).
This pesticide factsheet covers the use and characteristics of Pennant Magnum (S-metolachlor).
Research has shown that up to 75% of the preemergence herbicides broadcast-applied to container nursery crops falls to the ground between the pots. As the size of the crop increases, the space between pots increases - -resulting in greater and greater percentages of the applied herbicide falling between pots. This factsheet covers how to apply preemergence herbicides to individual pots uniformly and accurately.
This factsheet discusses PS-II-inhibiting herbicide injury on soybean.
This factsheet describes the symptoms of natural oil and acid herbicide injuries.
This pesticide factsheet covers the use and characteristics of Surflan (oryzalin).
This factsheet discuses very-long-chain fatty acid synthesis-inhibiting herbicide injury on soybean.
This pesticide factsheet covers the use and characteristics of Broadstar (flumioxazin).
This table presents information on postemergence herbicides registered for use on woody ornamentals.
This pesticide factsheet covers the use and characteristics of Fuerte (fumioxazin + prodiamine).
A table of efficacy rankings for preemergence herbicides labeled for use in nursery crops and/or ornamental landscape plantings.
This table presents information on preemergence herbicides registered for use on woody ornamentals.
