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2024 Southeastern US Vegetable Crop Handbook

By: J. M. Kemble, M.B. Bertucci, T.R. Bilbo, Katie Jennings, Inga Meadows, C. Rodrigues, Jim Walgenbach, A. L Wszelaki

The Southeastern Vegetable Extension Workers Group (SEVEW) is proud to offer you the 25th edition of the Southeastern U.S. 2024 Vegetable Crop Handbook. We are excited to provide growers, crop advisers, county educators, Extension agents, and specialists throughout the southeastern United States with this handbook. This handbook represents a joint effort among Extension specialists and researchers from 15 land-grant universities in the U.S. who work in the area of vegetable production. These specialists and researchers represent a wide array of disciplines: agricultural engineering, entomology, food safety, horticulture (vegetable production), plant pathology, postharvest physiology, soil science, and weed science.

Herbicide Carryover in Hay, Manure, Compost, and Grass Clippings

By: Jeanine Davis, Sue Ellen Johnson, Katie Jennings

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.

Weed Management in Onions

By: Roger Batts, Wayne Mitchem, David Monks, Katie Jennings Weed Management in North Carolina

Most commercial onions produced in North Carolina are seeded in the fall and harvested in mid- to late-June. Weed competition can reduce onion yields up to 96 percent, and weeds must be controlled throughout the growing season. Learn about the cultivation and herbicide options growers can use to keep onions weed-free in both wide and narrow rows.

Weed Management in Broccoli, Cabbage, and Cauliflower

By: Roger Batts, Wayne Mitchem, David Monks, Katie Jennings Weed Management in North Carolina

Keeping weeds out early in the season is very important for cole crops that are marketed by size. Learn how to use both cultivation and herbicides to achieve good early-season weed control and avoid losses in yield and profits.

Weed Control in Watermelon

By: Katie Jennings, Matthew Bertucci

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.

Chapter 8: Crop Production Management - Sweetpotatoes

By: Katie Jennings, Lina Quesada-Ocampo, Jonathan Schultheis, Alex Woodley, Craig Yencho, Kenneth Pecota, Anders Huseth, Stephen Cole Smith, Mike Boyette

This chapter of the North Carolina Organic Commodities Production Guide covers key management practices for organic sweet potato tobacco production.

Insect and Disease Control of Fruits

By: Jim Walgenbach, Sara Villani, Steven Frank, Dominic Reisig, Katie Jennings, Bill Cline, Meredith Favre, Dave Ritchie

This publication covers insect and disease control in apples, blueberries, caneberries, grapes, peaches, pecans and strawberries.

Management of Palmer Amaranth in Sweetpotato

By: Stephen C. Smith, Katie Jennings

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.

Weed Management in Collards, Kale, Mustard, and Turnip Greens

By: David Monks, Wayne Mitchem, Roger Batts, Katie Jennings Weed Management in North Carolina

Cool-season leafy greens face a different weed spectrum than warm-season crops. The presence of weeds in harvested greens can result in lower prices or rejection at market. Learn about the cultivation and herbicide options that growers can use to avoid weed competition and contamination.

Managing Weeds in Childcare Center Gardens

By: Katie Jennings, Lucy Bradley Local Foods: Childcare Center Production Gardens

This publication focuses on managing weeds in the Outdoor Learning Environment (OLE) of childcare centers. Included are general strategies to help childcare centers identify and manage weeds in childcare center production gardens.

Synthetic Auxins

By: Doug Goodale, Joe Neal, Katie Jennings Herbicide Injury Factsheets

This factsheet describes the symptoms of a synthetic auxin (SA) herbicide injury.

Weed Management in Okra

By: Wayne Mitchem, David Monks, Roger Batts, Katie Jennings Weed Management in North Carolina

Being related to cotton, okra can be a poor competitor with weeds, particularly early in the growing season. As the crop is harvested, more sunlight can reach the soil and increase late-season weed interference. Learn about the cultivation options and herbicides that growers can use for weed control in okra.

Weed Control Options for Strawberries on Plastic

By: Katie Jennings Horticulture Information Leaflets

Growing strawberries as an annual crop on black plastic requires a different weed management strategy than the perennial matted row strawberries. Weeds that have hard seed coats, such as vetch and clover, emerge for long periods of time can establish in the row. They emerge in late fall or spring, grow under the plastic for a period of time, and emerge from any holes in the plastic.

Weed Management in Lettuce

By: David Monks, Wayne Mitchem, Roger Batts, Katie Jennings Weed Management in North Carolina

Weed competition in lettuce reduces both yield and head quality. This cool-season crop faces competition from winter annuals as well as early summer weeds. Learn about the cultivation and herbicide options that growers can use to control weeds in lettuce, including advice for lettuce grown with plastic mulch.

Protoporphyrinogen Oxidase (PPO) Inhibitors

By: Doug Goodale, Joe Neal, Katie Jennings, Wayne Mitchem Herbicide Injury Factsheets

This factsheet describes the symptoms of a protoporphyrinogen oxidase inhibitor herbicide injury.

Photosystem II – Triazine Herbicides

By: Joe Neal, Douglas Goodale, Katie Jennings, Wayne Mitchem Herbicide Injury Factsheets

This factsheet describes the symptoms of a photosystem II (PS II) inhibitor herbicide injury.

Acetolactate Synthase (ALS) Inhibitors

By: Doug Goodale, Joe Neal, Katie Jennings Herbicide Injury Factsheets

This factsheet describes the symptoms of an ALS inhibitor herbicide injury.

Glyphosate

By: Joe Neal, Doug Goodale, Katie Jennings Herbicide Injury Factsheets

This factsheet describes the symptoms of a glyphosate herbicide injury.

Root Inhibitors

By: Joe Neal, Doug Goodale, Katie Jennings Herbicide Injury Factsheets

This factsheet describes the symptoms of root-inhibiting herbicide injuries.

Carotenoid Pigments

By: Joe Neal, Doug Goodale, Katie Jennings, Wayne Mitchem Herbicide Injury Factsheets

This factsheet describes the symptoms of a carotenoid pigment inhibitor herbicide injury.

Cellulose Inhibitors, Indaziflam, and Isoxaben

By: Joe Neal, Doug Goodale, Katie Jennings, Wayne Mitchem Herbicide Injury Factsheets

This factsheet describes the symptoms of cellulose-inhibiting herbicide injuries.

Alternative Product Demonstration and Research Guidelines for Extension Agents

By: Deanna Osmond, Luke Gatiboni, Robert Richardson, Hannah Burrack, Lindsey Thiessen, Joe Neal, Katie Jennings

This publication provides guidance to Extension agents on how to design and conduct trials and demonstrations on alternative products for plant and soil health and pest and disease control purposes. It provides standardized experimental design criteria and best practices for planning and executing trials for these products.

Shoot Inhibitors

By: Doug Goodale, Joe Neal, Katie Jennings, Wayne Mitchem Herbicide Injury Factsheets

This factsheet describes the symptoms of a shoot inhibitor herbicide injury.

Biomass Production of Biofumigant Cover Crops - 'Caliente' Mustard and Oilseed Radish

By: Ryan A. Pekarek, Greg Hoyt, David Monks, Katie Jennings

A new group of cover crops for winter and summer use include mustards, oilseed radishes and turnips. When young, these plants resemble turnip greens, are very succulent and have a low C:N ratio, resulting in rapid decomposition when incorporated into the soil. However, if allowed to mature, bolt and flower, they produce a large amount of biomass in a short period of time and become woody, resulting in slower decomposition than when killed at an immature stage.

Metribuzin

By: Doug Goodale, Joe Neal, Katie Jennings, Wayne Mitchem Herbicide Injury Factsheets

This factsheet describes the symptoms of a metribuzin herbicide injury.

Challenges with Herbicide Resistance and Value of Cultural Practices in Managing Weeds: Examples from Research in North Carolina

By: Ramon Leon Gonzalez, David Jordan, Katie Jennings, David Monks, Matthew Vann, Loren Fisher, Wesley Everman, Charlie Cahoon, Matt Inman, Chris Reberg-Horton, Rachel Vann, Denis Mahoney, Drew Hare, Alan York

A few weed species in North Carolina have become pervasive across the state and are frequently found in different crops. They form dense populations and reduce yields, making production more challenging. This publication discusses herbicide-resistant biotypes in agronomic and vegetable crops in North Carolina and reviews herbicide resistance management recommendations.

Natural Oils and Acids

By: Doug Goodale, Joe Neal, Katie Jennings, Wayne Mitchem Herbicide Injury Factsheets

This factsheet describes the symptoms of natural oil and acid herbicide injuries.