Southeastern Ornamental Horticulture Production and Integrated Pest Management

News alerts and tips from Southeastern universities.

Weeds of Container Nurseries in the United States – Online ID Key

Weed control can be one of the most costly risks in the production of container-grown nursery crops. Any control program begins with the correct identification of the weeds present, along with an understanding of their life cycles and modes of reproduction and spread. Treated here are the most common weeds of outdoor container nurseries, as well as a selection of recently introduced species with the potential to spread. This work is based in large part on Weeds of Container Nurseries (Neal & Derr 2005), but builds on that treatment through the addition of multi-access keys, taxa, and images. The content is optimized for mobile use and should be accessible from standard browsers on nearly any device, whether desktop, tablet, or smartphone.

Access the key here: http://www.cals.ncsu.edu/plantbiology/ncsc/containerWeeds/index.html

Future. We consider this work a “living” resource and seek to continue to add images, tweak content, improve keys, etc. over time. Future versions will be identified by sequentially increasing version numbers.

Copyright. Re-use of any image in this work, for any purpose what-so-ever, is prohibited without the express written permission of the copyright owner. For permission to re-use any image, please contact the copyright owner directly.

Spraying Insecticide? There’s an App for That

U.S. Department of Agriculture (USDA) scientists have released two mobile phone applications, or “apps,” to make things easier for anyone who needs to adjust insecticide spray equipment.

The apps were developed by Agricultural Research Service (ARS) scientists Bradley Fritzand Wesley “Clint” Hoffmann at the agency’s Areawide Pest Management Research Unit in College Station, Texas. The apps are designed to ensure that aerial and ground-based crews can hit targets and minimize pesticide drift by keying in specifics on the type of equipment and pesticide they are using.
ARS is USDA’s principal intramural scientific research agency, and the research supports the USDA goal of promoting agricultural sustainability.
With dozens of manufacturers producing dozens of different types of spray technology—each with its own nozzle type, flow rate, and pressure setting range—the equipment setup can get pretty complicated. Aerial sprayers also must factor in wind speed, air temperature, flight speed and humidity.
The apps incorporate the latest science of spray technology, including “spray nozzle atomization” models developed by ARS at College Station. They can be used with a smartphone and accessed right from a field or the cabin of a small aircraft. More than half of all aerial applicators responding to a survey by the National Agricultural Aviation Association reported using smartphones. Data also can be saved for later use and e-mailed to colleagues.
One app is designed for ground-based spraying for mosquitoes and other threats to public health. It covers 60 different sprayers made by 19 manufacturers and was developed jointly with the Department of Defense‘s Navy Entomology Center of Excellence in Jacksonville, Fla. The user selects the appropriate sprayer and is guided through the process of selecting specific operational settings, such as the nozzle type, flow rate and spray pressure setting.
The other app, for aerial spraying, walks users through the process of adjusting nozzles and settings so pesticides are delivered at optimal droplet sizes. Droplet size is critical in aerial operations to ensure “on-target deposition” and minimize pesticide drift. The user specifies the nozzle manufacturer from a menu and is steered through a series of screens and prompts that, based on the specific operating conditions, helps him or her select the right size of the nozzle opening, spray pressure, nozzle orientation and airspeed.

The apps are available online through the Apple iTunes App Store and the Google Play Android Marketplace by searching for “Aerial Sprays” for the aerial application app and “Vector Sprays” for the ground-based sprayer app.

Read more about this research in the November/December 2012 issue of Agricultural Research magazine.

The Economic Outlook for the Green Industry in 2012-13

In this webinar, Dr. Charlie Hall will provide projections for the economy in 2013 and how the economy will impact the green industry next year. Special post-election commentary will forecast what effects might be expected given the so-called fiscal cliff that is looming.

Title: “The Economic Outlook for the Green Industry in 2012-13”
Date: Thursday, November 15, 2012
Time: 11:00 AM – 11:45 AM CST

Register now by clicking the link below:
https://www1.gotomeeting.com/register/607656176

After registering you will receive a confirmation email containing information about joining the Webinar.

“Bringing Nature Home”, sponsored by the Georgia Exotic Pest Plant Council

Do you care about protecting our native plant habitats from invasive plants? How can you tell which plants are invasive? Do you want to know how you can help? First step is to come to the Georgia Exotic Pest Plant Council Annual Conference on November 8th.

The GA-EPPC, Georgia Exotic Pest Plant Council, is having its Annual Meeting and Conference on Thursday, November 8th, 2012, from 9am to 4pm. The conference will be held at Stuckey Conference Center, UGA 1109 Experiment Street Griffin, Georgia.

GA-EPPC’s goals are to focus attention on the adverse effects invasive plants have on the diversity of Georgia’s native plants and animals; the use of invasive plant management to prevent habitat loss; the socioeconomic impacts of these plants; changes in the seriousness of the different invasive plants over time and the need to exchange information to help land owners and managers set priorities for invasive plant management.

For more information please visit http://www.gaeppc.org/

Alternatives to Synthetic Herbicides for Weed Management in Container Nurseries

Weed management is one of the most critical and costly aspects for container nursery production. High irrigation and fertilization rates create a favorable environment for weed growth in addition to crop growth. Weeds can quickly out-compete the crop for light and other resources, reducing the rate and amount of crop growth as well as salability (Berchielli-Robertson et al., 1990; Norcini and Stamps, 1992). Weed management in nursery production is most effectively achieved by preventative practices, primarily with the use of pre-emergent herbicides (Gilliam et al., 1990; Gallitano and Skroch, 1993).

However, there are valid reasons for managing weeds using alternatives to synthetic herbicides (Sidebar 1). Ornamental crops encompass a wide array of species, and herbicide products must be tested on each for effective, safe and legal use. Even when a product is labeled for a crop, it may not be sufficiently effective for the weeds present or may induce crop damage under certain circumstances. Finally, use of synthetic herbicides in greenhouses and other enclosed structures is often prohibited on product labels.

Check out the entire publication here.

 

Research Needs Survey

We need YOUR input. The UGA Horticulture Department and Center for Applied Nursery Research ask you to take 2 minutes or less and fill out a 4 question – one page survey on your most pressing industry needs pertaining to research. This is your opportunity to let us know what you need – so do not be shy!

http://www.surveymonkey.com/s/DRWZ552

Many thanks,
Matthew

Alternatives in Cool-season Flowers for the Landscape

Allen D. Owings, Regina P. Bracy and Roger Rosendale

The LSU AgCenter Hammond Research Station evaluates approximately 300-350 cool-season bedding plants in landscape settings each year from October through May.

Of the annual flowers for the cool season of the year, most people are familiar with pansies, snapdragons, petunias, garden mums and older varieties of dianthus. But there are many more.

To read the entire article, click here.

 

Free Webinar: Disease Management for Winter Annuals

Jean Williams-Woodward, University of Georgia Extension Plant Pathologist, will present common winter annual flower diseases, what to watch for, and how to control them. This Webinar is free to all Landscape Contractors and Extension Professionals.

A complete schedule and archive of Landscape Professional webinars may be found at http://ugaurbanag.com/webinars

These webinars are easily viewed with a smart phone or iPad so you can be on the run.

 

Redheaded pine sawfly

 

The redheaded pine sawfly, Neodiprion lecontei, is a pest of pines in ornamental landscapes, nurseries, and plantations. Adults emerge in spring and a second generation occurs in mid summer.  Eggs are laid on many 2 and 3 needled pine species such as Jack pine, loblolly pine, and red pine.  Sawflies are not flies and the larvae do not turn into butterflies. They are non-stinging herbivorous wasps.  They can defoliate trees and bushes in the landscape. Since they are gregarious it is sometimes possible to prune off an infested branch and remove all the larvae.  Management for sawflies is similar as for caterpillars though not all the insecticides will work so check the label.  Horticultural oil is a good bet especially for small larvae. Formulations that contain azadirachtin or spinosad are also effective.  For sawflies and caterpillars, management of full grown caterpillars is generally not warranted;  the damage is already done and they are hard to kill.

For pictures of redheaded pine sawfly larvae and more information visit: http://ecoipm.com/

 

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