The Tennessee Pest Management Network is a component of the Southern IPM Center.


Below is a listing of information of possible interest to you:

A Report of STREPTOMYCIN RESISTANT STRAINS of Fireblight in New York

New Boxwood disease

a new Armored Scale found in Michigan

Onion Disease in Mexico

Kudzu bug / bean plastid see pages 9 and 10 in "What's Happening"

Scab (Fusarium head blight)FHB of Wheat

by Melvin Newman
The recent rains have increased the risk of wheat scab and the resulting mycotoxin called Deoxynivalenol (DON). The risk of scab development will increase if warm, moist conditions persist. Wheat grown after corn is at a higher risk because the same Fusarium fungus that causes scab also causes a stalk and ear rot of corn and produces spores on the corn debris that is left on the soil surface. Scab is also greater under no-till and minimum till wheat after corn.

Certain fungicides when sprayed at the right time can reduce head scab and reduce the about of DON in the grain. Many times grain buyers will not purchase grain that has higher than 5 PPM DON levels. Most producers have already sprayed their wheat but some are still wanting to spray a fungicide. Triazole fungicides such as Prosaro (6.5-8.2 fl. oz./a), and Caramba (14 fl. oz./a) have the best activity (suppression only) against scab. Folicur (4 oz./a) and generic formulations of tebuconazole has lesser activity, but may be less expensive. Strobilurin fungicides (although very effective against most other wheat diseases) registered for wheat disease control either have very little activity against scab and have the potential to increase mycotoxin (DON) levels in wheat. Some producers that have already sprayed a strobilurin fungicide (Headline, Quadris, Quilt Xcel or any other fungicides containing a strobilurin fungicide) at an earlier growth stage (example: F8 flag leaf emergence or even earlier) should now consider spraying again with one of the above Triazole fungicides to protect against severe scab.

The best time to apply one of these Triazole fungicides for scab control is at the mid-flowering stage (F 10.5.1). The fungicide labels for these chemicals state that applications should not be made within 30 days of harvest. So, about 5 days after blooming, fungicide applications should be stopped to avoid this restriction and because infection by the scab fungus has probably already occurred . Also, labels state that one should not apply fungicides within 100 feet of any aquatic area.

Brown Marmorated Stink Bug The brown marmorated stink bug is causing problems as a nuisance pest and as a pest of several crops such as apples.

POTATO VIRUS Y - USA: NEW STRAINS

Resources for Cultivated Palms

New Soybean Disease Hits Brazil - "Soja Louca 2" or "Crazy Soybean 2"

Soybean Frogeye Leafspot is becoming resistant PEST ALERT in pdf format.

Cogongrass a potentially invasive pest for Tennessee

GOSS'S WILT, MAIZE - USA: (MINNESOTA) posted 2-15-2010

POTATO VIRUSES - CANADA: (PRINCE EDWARD ISLAND)

CLUBROOT, OILSEED RAPE - CANADA: (ALBERTA)

BACTERIAL BLIGHT, TOMATO, CABBAGE - BAHAMAS: (NORTH ANDROS) Source: Bahama Islands Info 1-11-2010

Downy Mildew of Spinach - New Strain California

Verticillum Wilt of Lettuce and Spinach California

Vet claims goat was a health risk at Fair CASEOUS LYMPHADENITIS in Goats

Scab Smart Grain producers and others looking for the latest information on the management of fusarium head blight (scab) now have a valuable new online tool.

Soybean Rust Alert 8-17-09

Blueberry scorch virus, Blueberry shock virus in Michigan

Valdensinia leaf drop of blueberry - Canada

MULTIPLE CAUSES SUSPECTED of COLONY COLLAPSE DISORDER (CCD), APIS

Wingless Ladybugs Promise Lasting Pest Control

National Online Bed Bug Registry locates hotels with dreaded infestations a link directly to the registry Registry Link

New unidentified thrips damaging cotton in South Texas Caliothrips sp.

Downy Mildew Cucurbits posted 7-4-09

Downy Mildew Basil posted 7-4-09

Pasteuria Bioscience Receives EPA Registration for Nematode Control An environmentally-friendly agent for sting nematode control.

World Wheat - New Fungus

Possible increase in tomato blight caused by wet weather source in Alabama

Association of ‘Candidatus Liberibacter solanacearum’ with Zebra Chip Disease of Potato Established by Graft and Psyllid Transmission

Tomato necrotic spot virus - California: new ilarvirus

Japanese and Oriental Beetle Traps Bull Run Japanese and Oriental Beetle Trap containing an active ingredient not included in any previously registered products approved by EPA.

Critical Issues: Emerging and New Plant and Animal Pests and Diseases RFA released 03-06-09

Tomato Torrado Virus - PANAMA, AUSTRALIA: FIRST REPORTS

USDA CONTINUES EFFORTS TO KEEP INVASIVE SPECIES OUT OF THE UNITED STATES 01-22-09

New Strain of Downy Mildew found in Spinach 01-09-09

An emerging Virus of Concern, COLOMBIAN DATURA VIRUS in PDF format

Late blight of tomato and potato (NEW STRAIN), Another article Posted 1/9/09

Goss's bacterial wilt confirmed in Indiana corn Aug. 18, 2008

Goss's wilt prevalent in western Iowa corn Aug. 11, 2008


Direct any additional questions concerning Tennessee's program to:

Darrell D. Hensley
University of Tennessee
Entomology and Plant Pathology
2431 Joe Johnson Drive, 205 PSB
Knoxville, TN 37996-4560
Phone 865-974-7958
Fax 865-974-8868
email = dhensley@utk.edu

Funding for the national network of Pest Management Centers was authorized by Section 406 of the Agricultural Research, Extension, and Education Reform Act of 1998. As the result of a second competitive process in 2003, four IPM Centers across the United States were again funded in FY 2003, with the Southern Region Center located at the NSF Center for IPM at North Carolina State University.