Fruit Facts, 1998-02, February | Department of Horticulture

February 1998 (2-98)

Prepared by John Strang and Jerry Brown, Extension Horticulturists; Dana Hadad; Dwight Wolfe, Horticulture Research Specialist; John Hartman, Extension Plant Pathologist; Tim Woods, Extension Agricultural Economists; John Strang, Editor, Marilyn Hooks and Elizabeth Griffin, Secretaries

Meetings

Feb. 17 - Botanical Herbs & Specialty Vegetables, Day tour of local horticultural businesses, Louisville, KY, 10:00-4:00p.m. and The Future of Growing Botanicals for the Medicinal Plant Industry 6:30-9:30p.m. Registration $5.00. Contact Roy Ballard 812/948-5470.

Feb. 19 - Ohio Berry Summit, Bloomfield Auditorium Ohio Department of Agriculture Building, Reynoldsburg, OH. Registration $10.00 which includes lunch and handouts. Contact Mike Pullins 614/249-2424 or Tom Wall 800/297-2072.

Feb. 26-28 - North American Farmer's Direct Marketing Conference and North American Strawberry Growers Annual Meeting, Victoria Conference Centre Empress Hotel, Victoria, British Columbia, Canada. Contact 250/656-0941.

Feb. 27 - Northern Piedmont N.C. Specialty Crops School. Ramada Inn, Exit #204 off of I-85, Oxford, NC, approximately 30 miles north of Durham. Registration $25.00. Contact Granville County Center 919/603-1350.

Mar. 9-10 - Management First for Apple IPM. Rough River Dam State Resort Park. See article and registration form in the January Fruit Facts. Contact Jerry Brown 502/365-7541 Ext. 204 or John Strang 606 257-5685.

Mar. 9 - Opportunities in Mushroom Production, New Albany, IN. Registration $5.00. Contact Roy Ballard 812/948-5470.

Jun. 14 - Kentucky Herb Festival, Lakeview Park, Frankfort, KY. Contact Sue Clifford 606/234-1452.

July 16-19 - International Herb Association Annual Conference, "Herb Smart Day" open to the public, July 19. Contact International Herb Association 847/949-4372, www.herb-pros.com.

Abound - A New Fungicide for Grapes

Derived from a new class of chemical compounds extracted from the wood decaying toadstool Strobilurus tenacellus, Abound fungicide, manufactured by Zeneca Ag Products is listed in our grape spray guide for 1998. The fungicide is formulated as a flowable fungicide containing 22.9% of the active ingredient azoxystrobin. Abound is a broad spectrum, preventive fungicide with systemic and curative properties. It can be alternated or tank mixed with other registered fungicides and should be used in a way that minimizes development of fungicide resistance to the chemical.

An integrated pest management (IPM) program for grapes is essential for success with this or any grape fungicide. The IPM program should include practices known to reduce disease development such as a) selection of varieties with disease tolerance or resistance, b) canopy management through pruning and thinning, c) proper timing and placement of irrigation, d) removal of plant debris where inoculum overwinters, and e) use of fungicides only when required.

Abound is useful for management of four different fungal pathogens of grape causing the following diseases: black rot (Guignardia bidwellii), downy mildew (Plasmopara viticola), Phomopsis cane and leaf spot (Phomopsis viticola), and powdery mildew (Uncinula necator). Abound has been tested experimentally in Tennessee and shown to provide downy mildew control equal to that of captan.

The first application of Abound can be made at bud break, and the last one 14 days prior to harvest, but during the season, no more than two sequential applications of the fungicide should be made and no more than six total applications can be made per season. For more details on timing and use of grape fungicides, consult the "Kentucky Commercial Small Fruit and Grape Spray Guide" (ID-94), available at your County Extension Office.

A note of caution: Abound fungicide is very phytotoxic to certain varieties of apples. Do not use the same spray equipment for grapes and apples if Abound is used on grapes. Although the Abound label lists peaches as a legal site for application, we have chosen to omit Abound from our tree fruit spray guides because in Kentucky, it is likely that the same spray equipment would be used for both apples and peaches. (Hartman)

Apple Scab Resistant Cultivars - Susceptibility to Other Diseases

Disease ratings of apple scab resistant cultivars that can be grown in Kentucky are found in the following table:

------------------------------------------------------------------------

Cedar Cedar Fire Powdery

Apple scab apple rust quince rust blight mildew

Apple suscept. suscept. suscept. suscept. suscept.

Cultivars ratings ratings ratings ratings ratings

----------- --------- --------- --------- --------- ---------

Britegold VR HS HS MR R

Dayton VR R ? ? R

Enterprise VR VR ? ? R

Freedom VR S ? MR R

Gold Rush VR HS ? ? S

Jonafree VR HS S S R

Liberty VR VR S MR S

Macfree VR VR HS MR S

Moira VR R HS S S

Murray VR R HS MR ?

Nova Easygro VR VR ? MR S

Novamac VR VR HS ? ?

Prima VR HS HS MR R

Priscilla VR VR HS MR R

Pristine VR S ? ? S

Redfree VR VR R S S

Richilieu VR HS S ? ?

Sir Prize VR HS HS MR R

Trent VR R HS MR R

Williams Pride VR S ? ? R

-----------------------------------------------------------------------

VR = very resistant. No control needed.

MR = moderately resistant. Control only needed with fire blight susceptible rootstocks or under high disease pressure

R = resistant. Control only needed under high disease pressure.

S = susceptible. Control usually needed where disease is prevalent.

HS = highly susceptible. Control always needed where disease is prevalent. These cultivars should receive first priority when control is called for.

This information, adapted for "Fruit Facts," was obtained from the internet site maintained by the Kearneysville Tree Fruit Research and Education Center of West Virginia University (http://www.caf.wvu.edu/kearneysville/tables/totscabsus.html). (Hartman)

Orchard Chemical Suppliers

The following list has been compiled in response to Kentucky grower and County Agricultural Extension Agent requests for outlets from which to purchase many of the pesticides listed in fruit extension publications. In some areas of the state it is very difficult to find pesticides recommended for fruit crops. No supplier endorsement is implied here and a concerted effort was made to locate all of the major fruit chemical suppliers in the state. In addition several suppliers in surrounding states are also listed.

One grower concern was, would the supplier sell and deliver less than case quantities? This is noted in the table. Another question suppliers were asked was who they would sell to.

Full Service -

deliver less than

Orchard chemical suppliers case quantities Sales made to:

Agri-Chem, Inc. No growers

1301 US Hwy. 62 West

Princeton, KY 42445

502/365-7232

Akridge Farm Supply Subject to retail outlets

724 Fairview Ave. Availability growers

Eddyville KY

502/388-2910

Akridge Farm Supply

P.O. Box 175

Fredonia, KY. 42411

502/545-3332

Bluegrass Feed Can not ship retail,

P.O. Box 1095 wholesale possible

Louisa, KY 41230 (Call first)

606/638-3333

Cayce Lime & Fertilizer In local growers

179 Simpson Street area

Fulton, KY 42041

502/838-6261

(fruit chemicals not stocked/will

order in)

CORY/TERRA Yes wholesale

13000 Middletown Industrial Blvd. retail outlets

Suite K growers

Louisville, KY 40223

502/245-5934 800/424-2679

CORY TERRA Yes wholesale

6739 Guion Rd. retail outlets

Indianapolis, IN 46268 growers

800/672-4273

Grower Service Corporation Not normally wholesale

574 Horton Court To grower only

Lexington, KY. 40511 if a retail outlet

606/254-3811 is not in area

Helena Yes wholesale

P.O. Box 366 retail outlets

Springfield, KY growers

606/336-3947 800/633-1881

Miles Farm Supply No growers

2760 Keller Rd.

Owensboro, KY 42301

502/926-2420

UAP-Richter/ John Phillips Will deliver growers 1061 Henderson - Ford if possible, retail, Mooresville, Indiana, 46158 (ship UPS) wholesale phone and fax 317/831-2559

voice pager 888/474-6470 toll free

Ryan's Agri & Pest Supplies Yes wholesale

1130 West High Street retail outlets

Lexington, KY 40508 producer

606/233-0057

Robinson Milling Co. Possibly retail

P.O. Box 357

Somerset, KY 42502

606/678-4106, or 4107

Salem Fruit Growers Coop. Assoc. Will ship growers

12093 Lisbon Rd. retail

P.O. Box 3

Greenford, OH 44422

800/423-3609

Security Seed & Chemical Co., Inc. No wholesale

1095 Majaun Road retail outlets

Lexington, Ky producer

606/255-7636

Security Seed & Chemical Co., Inc. In local wholesale

1916 Dawson Springs Road area retail outlets

Hopkinsville, KY 42240 growers

502/885-3650

Security Seed & Chemical Co., Inc. No wholesale

1920 Dawson Road retail outlets

Russellville, KY 42276 producers

502/726-4133

(fruit chemicals not stocked/will

order in)

Security Seed & Chemical Co., Inc. In local retail outlets

1902 Guthrie Avenue area farmers

St. Bethlehem

Clarksville, TN 37177

615/552-0107

Southern States Cooperatives growers

A considerable number of these

are spread across the state and

are the source of some pesticides

for fruit crops.

TERRA Yes wholesale

200 Jamestown Rd retail outlets

Cobden, IL 62920 growers

618/893-4852

Tri State Delta Chemical Will ship wholesale to

United Horticultural Supply UPS grower only,

574 Horton Court if a retail

Lexington, KY 40511 outlet is not

606/254-3811 in area