Georgia Vegetable
Extension-Research Report
2006

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Edited by William Terry Kelley and David B. Langston, Jr

The University of Georgia
College of Agricultural & Environmental Sciences
Cooperative Extension
Agricultural Experiment Station
U.S. Department of Agriculture

Table of Contents

Cultural Practices

Effect of Harpin Protein ('Messenger') on Bell Pepper Plant Growth, Plant Disease, and Fruit Yield ..............1
Juan C. Diaz-Perez
Comparison of Two Types of Tillage Systems for Vegetable Production.............................................................3
Paul E. Sumner and Robert D. McNeill, IV
Greater Plant Populations May Increase Broccoli Yeild.......................................................................................6
William Terry Kelley and Denne Bertrand
Rescue and Nutriphite Do Not Significantly Effect Yield of Cantaloupe and Cucumber.....................................9
William Terry Kelley and Denne Bertrand
Evaluating Gas Fumigants Released Through Various Mulches 2006...............................................................11
Paul E. Sumner and Stanley Culpepper
Application of Experimental Granular Soil Ammendments on Bell Pepper in Spring.........................................19
William Terry Kelley and Denne Bertrand
Effects of Experimental Granular Soil Ammendments on Fall Bell Pepper........................................................21
William Terry Kelley and Denne Bertrand
Application of Experimental Liquid Soil Ammendments on Bell Pepper in Spring ............................................23
William Terry Kelley and Denne Bertrand
Effects of Experimental Liquid Soil Ammendments on Fall Bell Pepper.............................................................25
William Terry Kelley and Denne Bertrand

Disease Control

Evaluation of Brassica Cover Crops for Control of Soilborne Pest and Diseases on Pepper............................27
W. S Monfort, A. S. Csinos, A. R. Barrentine, and Lara Lee Hickman
Evaluation of Brassica Cover Crops for Control of Soilborne Pest and Diseases on Subsequent Squash.......31
W. S Monfort, A. S. Csinos, A. R. Barrentine, and Lara Lee Hickman
Evaluation of Brassica Cover Crops for Control of Soilborne Pest and Diseases on Subsequent Squash.......36
W. S Monfort, A. S. Csinos, A. R. Barrentine, and Lara Lee Hickman
Evaluation of Brassica Cover Crops for Control of Soilborne Pest and Diseases on Tomato...........................40
W. S Monfort, A. S. Csinos, A. R. Barrentine, and Lara Lee Hickman
The Effect Time of Chemigation and Rate and Method of Metam Sodium Application on Root Knot Nematode Soil Population and Phytophthora Capsici and Rhizoctonia Solani Survival in Raised
Plastic-Mulched Soil Beds.....................................................................................................................................44

B. L. Candole, A. S. Csinos, and D. Wang
Isagro Ricerca Soil Drench Applications for Management of Phytophthora Capsici on Yellow Squash and Tomato....................................................................................................................................................................50
A. S. Csinos, Scott Monfort, Unesee Hargett, and Lara Lee Hickman
Nufarm Soil Drench and Foliar Application for Management of Phytophthora Capsici ...................................55
A. S. Csinos, Scott Monfort, Unesee Hargett, and Lara Lee Hickman
PCAP Trial #1 Black Shank Farm-Bayer-Cerexagri Evaluation of Fungicides for Control of Phytophthora Capsici....................................................................................................................................................................58
A. S. Csinos, Lara Lee Hickman, and Unessee Hargett
Chemical Management of Phytophthora Blight of Squash ................................................................................ 62
B. L. Candole, Lara Hickman, A. S. Csinos, and Unesee Hargett
PCAP Trial #3 Valent, Agriquest, Viva for Management of Phytophthora Capsici..........................................65
A. S. Csinos, Lara Lee Hickman, and Unessee Hargett
PCAP Trial #4-Spring Nufarm for the Management of Phytophthora Capsici..................................................69
A. S. Csinos, Lara Lee Hickman, and Unessee Hargett
Efficacy of Fungicides Against Phytophthora Capsici of Peppers......................................................................73
A.S. Csinos and B. L. Candole
Evaluation of Fungicides and Spray Programs for Control of Powder Mildew in Butternut Squash in Georgia 2006 ......................................................................................................................................................................76
David B. Langston, Jr.
Evaluation of Fungicides and Spray Programs for Control of Downy Mildew of Cucumber in Georgia I, 2006.....................................................................................................................................................................77
David B. Langston, Jr.
Evaluation of Fungicides and Spray Programs for Control of Downy Mildew of Cucumber in Georgia II, 2006.....................................................................................................................................................................78
David B. Langston, Jr.
Evaluation of Fungicides and Spray Programs for Control of Downy Mildew of Cucumber in Georgia III, 2006.....................................................................................................................................................................80
David B. Langston, Jr.
Evaluation of Fungicides and Spray Programs for Control of Powdery Mildew in Summer Squash in Georgia, 2006.....................................................................................................................................................................81
David B. Langston, Jr.

Insect Management

Evaluation of Selected Synthetic and Biorational Insecticides for Control of Cabbage Looper and Imported Cabbageworm....................................................................................................................................................82
Alton N. Sparks, Jr.
Evaluation of Insecticide in Broccoli 2006......................................................................................................85
David G. Riley
Evaluation of Insecticide Treatments in Broccoli 2006.................................................................................88
David G. Riley
Control of Caterpillar Pests of Collards with Bacillus Thruingiensis...........................................................90
Alton N. Sparks, Jr.
Evaluation of Insecticide Treatments in Cabbage I......................................................................................93
David G. Riley
Evaluation of Insecticide Treatments in Collard - Fall 2006 .......................................................................97
David G. Riley
Evaluation of Insecticide Treatments in Cabbage........................................................................................99
David G. Riley
Efficacy of Foliar Applied Venom and V-10170 for Management of Silverleaf in Squash............................................................................................................................................................101
Alton N. Sparks, Jr.
Efficacy of Venom and V-10170 Applied Through Drip Irrigation system for Management of Silverleaf in Squash...........................................................................................................................................................104
Alton N. Sparks, Jr.
Evaluation of Insecticide Treatments in Snap Bean, 2006.........................................................................106
David G. Riley and Jackie Davis
Efficacy of Foliar Insecticides for Control of Silverleaf Whitefly on Snap Beans....................................107
Alton N. Sparks, Jr.
Pepper Leaf Bioassay for Insecticides for Beet Armyworm, 2006............................................................109
David G. Riley
Efficacy of Whorl Stage Insecticide Applications Against Fall Armyworm in Sweet Corn.......................111
Alton N. Sparks, Jr.
Efficacy of Registered Insecticide Chemistries for Control of Corn Earworm in Silking Sweet Corn.....113
Alton N. Sparks, Jr.
Field Evaluation of Insecticide Resistance in Diamondback Moth and Implications for Future Management..................................................................................................................................................116
Alton N. Sparks, Jr. and Keith Rucker
Efficacy of Silk Channel Treatments With Oil for Control of Corn Earworm in Sweet Corn...................120
Alton N. Sparks, Jr.
Management of Silverleaf in Squash with Soil and Foliar Applied Insecticides........................................123
Alton N. Sparks, Jr.
Evaluation of Foliar and Drip Injected Insecticides in Squash, 2006.........................................................127
David G. Riley
Control of Caterpillar Pests of Collards with Foliar Insecticides...............................................................129
Alton N. Sparks, Jr.
Evaluating Foliar Insecticides for Control of Thrips and other Insects on Snap Beans ..........................131
Robert M. McPherson

Weed Management

Cucumber, Squash, and Watermelon Transplant Tolerance to Preplant Applications of 2,4-D .............137
A. W. MacRae and A. S. Culpepper
Cabbage, Mustard Greens, and Turnip Greens Herbicide Screening Study...........................................140
A. W. MacRae and A. S. Culpepper
Summer Solarization and Fallow Tillage to Control Yellow Nutsedge and Nematodes...........................144
W. C. Johnson, III and R. F. Davis
Evaluating Placement Depth of Dimethyl Disulfide Plus Chloropicrin Under LDPE and VIF Mulch....152
S. Culpepper, A. Davis, and A. MacRae

Postharvest

Shelf Life Study of Bell Pepper Using Various Methyl Bromide Alternative Weed Control Tactics 2005
and 2006.......................................................................................................................................................154

Paul E. Sumner and Stanley Culpepper

Variety Trials

Broccoli Trials Show Differences Among Varieties................................................................................. 157
William Terry Kelley and Denne Bertrand
Squash Variety Trial, 2006.........................................................................................................................160
George Boyhan, Chris Hopkins, and Randy Hill
Cantaloupe Variety Trial, 2006..................................................................................................................163
George Boyhan, Reid Torrance, Cliff Riner, and Randy Hill
Watermelon Variety Trial Yields Poor Results in 2006............................................................................165
George Boyhan
Several Hot Pepper Varieties Prove to be Good.......................................................................................170
William Terry Kelley and Denne Bertrand
'Jade Cross' Produces Highest Brussels Sprout Yield...........................................................................172
William Terry Kelley and Denne Bertrand
Some Cauliflower Varieties Better Suited for Georgia than Others........................................................174
William Terry Kelley and Denne Bertrand
Cabbage Variety Trials Reveal Marked Differences in Georgia............................................................176
William Terry Kelley and Denne Bertrand
Several New Pumpkins Perform Well In Georgia-North Carolina Variety Trials..................................178
William Terry Kelley and Greg D. Hoyt

Notice to Users

Use of products mentioned in this publication must be consistent with the
manufacturer’s current label as registered with the appropriate agencies. Mention of a product does not constitute an endorsement or guarantee by the University of Georgia or any other agencies and personnel nor discrimination of similar products not mentioned. Trade names and brand names are used only for informational purposes.

Authors are responsible for statements made and for the accuracy of the data presented. The editors, affiliated associations, typists, etc., assume no responsibility for typographical or other errors found in text or tables. Copies of this publication or parts of it should not be made without the consent of authors. Reprints of reports may be obtained from the authors.

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Cooperative Research - Extension Publication No. 5-2007

June 2007

Issued in furtherance of Georgia Agricultural Experiment Stations research work, Cooperative Extension work, Acts of May 8 and June 30, 1914, The University of Georgia College of Agricultural and Environmental Sciences and the U.S. Department of Agriculture Cooperating.

Scott Angle
Dean and Director