UGA Extension Office

Agriculture & Natural Resources

Extension ANR Publications
Low-Volume Irrigation Systems for Blueberry with Chemigation and Fertigation Suggestions (B 1504) Drip, trickle, microemitters, and subsurface irrigation systems are considered low-volume irrigation. Low-volume irrigation systems are designed to improve irrigation efficiency, delivering water to the crop accurately with minimal water loss. Irrigation efficiency can be categorized into two main concepts: water loss and uniform application. If water loss is significant, or application uniformity is poor, efficiency will be low. Generally, the most significant loss of irrigation water is from overwatering, where the water percolates below the root zone, or from runoff. With good management, losses due to leaks, system drainage, and flushing of filters and lateral lines should not exceed 1%. Low-volume systems have the opportunity to achieve efficiency, and under careful management, will minimize losses from overirrigation. However, using low-volume systems requires increased irrigation frequency and soil moisture monitoring should be used to improve water-use efficiency. This publication covers system design, system efficiencies, components, chemical applications, diseases related to irrigation, and soil moisture monitoring.
Hurricane Michael’s Impact on Vegetable Production in Georgia (TP 105) Weather events such as hurricanes, tropical storms, and severe rainfall are common to the Southeastern U.S. These events have the potential to cause severe economic damage to the region’s vegetable industry. On Oct. 10-11, Hurricane Michael made landfall on the panhandle of Florida as a Category 4 hurricane and moved northeast through southwest Georgia, causing significant damage to large portions of the vegetable industry in Georgia. Vegetables can be severely affected by strong winds, heavy rainfall, and flooding events. Direct damage to crops may be caused by strong winds resulting in lodging and defoliation of plants, or heavy rainfall, which may cause flooding or severe runoff and soil erosion. Secondary effects include the loss of marketable fruit due to a lack of foliage. Without shade from foliage, the fruit of the plant is susceptible to sunburn damage as well as disease resulting from injury. In Georgia, Hurricane Michael had sustained winds of more than 80 mph, with gusts between 100-110 mph, which directly affected vegetable fields in the state. Crop damage after the initial storm will continue, mostly due to the sunburn of exposed fruit and disease caused by damage. Losses due to secondary rot and sunburn in some crops will likely result in higher losses. Growers are trying to minimize sunburn by using shading materials, and while these materials can mitigate short-term losses due to sunburn, their usefulness is often limited to a few days.
Whitefly-Transmitted Plant Viruses in South Georgia (B 1507) The silverleaf whitefly (SLWF), Bemisia tabaci, (also known as sweet potato whitefly) is a pest of a wide variety of horticultural and agronomic crops in southern Georgia. Adults and nymphs (Figure 1) have piercing-sucking mouthparts and feed on phloem, the transport tissue of plants, and remove plant sap. While this direct feeding can damage plants and lead to additional problems with the accumulation of honeydew and sooty mold, whiteflies also inject salivary fluids while feeding, which can result in plant disorders and transmission of plant viruses. When viral pathogens are present, their transmission creates the greatest threat to the economical production of many vegetable crops, particularly tomatoes, snap beans, most cucurbit crops, and occasionally, cole crops. The potential for whitefly pest problems and viral disease incidence in Georgia varies greatly by year, location, and production season. Recent experience indicates that greater viral incidence can be observed when pest populations are high, even though few viruliferous (virus-carrying) whiteflies are needed to inoculate individual plants.
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Extension News
  • Soil Mixes link UGA expert says good vegetables begin with good soil. By Josh Fuder | Published: 9/20/2018
  • Sun & Soil link Test soil and pick the perfect spot before putting seeds or plants in fall gardens. By Beverly Adams | Published: 9/17/2018
  • Winter Chores link Winter garden chores include cleaning and sharpening gardening tools and enriching garden soil. By Mary Carol Sheffield | Published: 2/1/2018
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Below are some of UGA Extension's most broadly useful resources for those involved in agriculture on the farm, in schools, and around the home.

Production Agriculture:
 
Statewide Variety Testing Which varieties should you plant? The variety testing team does the work and research for farmers.
 
UGA Weather Network Reliable weather information for agricultural and environmental applications, including soil temperature, rainfall, wind speed, and more.
 
Pesticide Safety Education Everything you need to achieve certification and maintain the knowledge to safely and effectively make use of restricted-use and all other types of pesticides.
Sustainable Agriculture A collection of resources for those interested in production and marketing practices that are profitable, environmentally sound, and that improve the quality of life for farmers, farm workers, and the community.
Ag Budgets and Economics Resources for production economics, farm management, marketing, situation and outlook, risk management, financial management, farm policy, labor, and taxation.
 
Farmgate Value Report Annual county-level reports documenting the value of all food and fiber commodities grown in the state.
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Home & Garden:
 
Soil Testing Ensure that your soil is productive! Get your soil tested to determine the amount and kind of nutrients that should be added for the best growth.
 
Pest Management Recommendations for pest control around homes, on pets, in the home garden, and more.
 
Household Water Quality Water quality has an immediate and a prolonged effect on the health of your household. This publication series contains basic information about home water quality and treatment.
 
Home Garden Publication Series Topics include garden planning, soil preparation, weed control, pollination, disease and insect control, harvesting, and preserving.
Georgia Green Industry Professional Development The UGA Center for Urban Agriculture offers professional training and certifications for the Georgia Certified Landscape Professional, Georgia Certified Plant Professional exam and Super Crew employee training series.
Schools:
Community and School Gardens This Community and School Gardens blog is designed to help community and school gardeners succeed by connecting them to UGA Extension and other research-based resources.
Lesson Plans and Teacher Resources Whether you'd like to help protect the environment, teach your students how to avoid chronic diseases with healthy food and physical activity, or train food handlers in your cafeteria, University of Georgia Extension can help.
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