William C. Nesmith
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View article: Bacterial Spot Resistance, Yield, and Quality of Bell and Specialty Peppers
Bacterial Spot Resistance, Yield, and Quality of Bell and Specialty Peppers Open
Bacterial spot epidemics, caused by Xanthomonas campestris pv. vesicatoria (Xcv), are still considered serious risks for commercial pepper ( Capsicum annuum ) growers in a number of eastern, southern and midwestern states. Newly released b…
View article: 428 In Search of the Kentucky Tomato
428 In Search of the Kentucky Tomato Open
We began trials of vine-ripened, staked tomato cultivars in 1998 to identify a variety suitable for marketing as a premium “Kentucky Tomato”. In conversations with marketing specialists at the Kentucky Dept. of Agriculture and merchandisin…
View article: Yields and Disease Resistance of Fall-harvested Transgenic and Conventional Summer Squash in Kentucky
Yields and Disease Resistance of Fall-harvested Transgenic and Conventional Summer Squash in Kentucky Open
Virus and fungal disease pressures limit fall production of summer squash ( Cucurbita pepo L.) in Kentucky. Twenty-five summer squash cultivars (nine zucchini, eight yellow straightneck, and eight yellow crookneck entries) were evaluated f…
View article: Comparison of Resistant Cultivars for Management of Bacterial Spot in Peppers
Comparison of Resistant Cultivars for Management of Bacterial Spot in Peppers Open
Bacterial spot epidemics, caused by Xanthomonas campestris pv. vesicatoria (Doidge) Dye, continue to plague bell pepper ( Capsicum annuum L.) growers in a number of southern and midwestern states. A 3-year study designed to compare cultiva…
View article: Introducing Tomcast and Action Thresholds for Processing Tomatoes in Western Kentucky
Introducing Tomcast and Action Thresholds for Processing Tomatoes in Western Kentucky Open
Farmers' field trials conducted in western Kentucky counties in 1995 and 1996 showed that dramatic reductions in insecticide usage are possible using scouting and action thresholds. Five-acre plots were scouted and treated according to act…
View article: FIELD EVALUATION OF NEW BELL PEPPER CULTIVARS FOR BACTERIAL LEAF SPOT RESISTANCE
FIELD EVALUATION OF NEW BELL PEPPER CULTIVARS FOR BACTERIAL LEAF SPOT RESISTANCE Open
Kentucky growers currently produce about 1300 acres of bell peppers worth $2 million for both fresh market and processing. Bacterial leaf spot (BLS) caused by Xanthomonas campestris pv. vesicatoria has been the scourge which continues to l…
View article: Field Tolerance of Bell Pepper Cultivars to Bacterial Leaf Spot under Epidemic Conditions
Field Tolerance of Bell Pepper Cultivars to Bacterial Leaf Spot under Epidemic Conditions Open
Bacterial leaf spot (BLS) caused by Xanthomonas campestris pv. vesicatoria is the scourge that has devastated and continues to limit expansion of both fresh-market and processing pepper production in Kentucky. Fourteen new BLS-resistant va…
View article: Submitting Plant Specimens for Disease Diagnosis
Submitting Plant Specimens for Disease Diagnosis Open
Accurate diagnosis of a plant disease depends on having a fresh sample representative of the problem. To get an accurate diagnosis when your plant has a disease problem, you need to collect the right kind of sample.\nYou also need to provi…
View article: Black Root Rot in Tobacco
Black Root Rot in Tobacco Open
Black root rot is an important disease of tobacco in Kentucky, causing estimated annual losses in excess of $6,000,000. It rarely causes spectacular damage in any one burley field since the recommended burley varieties have some degree of …
View article: Bacterial Spot of Pepper and Tomato
Bacterial Spot of Pepper and Tomato Open
Bacterial spot can result in severe damage to sweet pepper, tomato or pimento crops to the extent that it is a limiting factor to successful production. The bacterium (Xanthomonas vesicatoria) attacks leaves, fruits and stems causing blemi…
View article: Blackleg and Soft Rot Disease of Potato
Blackleg and Soft Rot Disease of Potato Open
Blackleg and soft rot are bacterial diseases that, in some years, causes heavy losses in Kentucky potato patches. They may cause missing hills when it destroys the seed piece or the sprouts before they emerge from the ground. The bacteria …
View article: Root Knot Nematode in Gardens and Commercial Vegetables
Root Knot Nematode in Gardens and Commercial Vegetables Open
The root knot nematode (Meloidogyne spp.) causes damage by its feeding and reproduction on plant roots. There are several pathogenic species of this nematode but the two most commonly found in Kentucky are the southern root knot nematode, …
View article: Managing Leaf Spot Diseases of Alfalfa
Managing Leaf Spot Diseases of Alfalfa Open
Approximately 25-30 diseases attack and reduce the yield, quality or stand longevity of alfalfa in Kentucky. The largest number of these diseases are leaf spot. Generally, the leaf spots diseases are more important in reducing quality due …
View article: Tomato Wilt Problems
Tomato Wilt Problems Open
Fusarium oxysporum f. sp. lycopersici and Verticillium albo-atrum are two fungi that cause similar wilt diseases in tomato. Fusarium is more common in replant fields and gardens while Verticillium has been destructive on greenhouse tomatoe…
View article: Current Disease Problems in Alfalfa
Current Disease Problems in Alfalfa Open
Alfalfa is attacked by many fungi, bacteria, viruses and nematodes which USDA estimates reduces hay yields by 24% annually in the U.S. Even greater losses occur in Kentucky. However, it is the diseases of the root and crown which cause the…
View article: The Importance of Reporting Soil Properties in Insecticide and Acaricide Tests and Methods of Determination
The Importance of Reporting Soil Properties in Insecticide and Acaricide Tests and Methods of Determination Open
A large number of tests are performed annually to evaluate the efficacy of chemicals for controlling plant pathogenic microorganisms and insects in the soil. Many of these testsare reported with minimal or no reference to soil conditions. …
View article: Cultural Practices Affect Cold Hardiness and Peach Tree Short Life1
Cultural Practices Affect Cold Hardiness and Peach Tree Short Life1 Open
To determine whether cold hardiness of peach [ Prunus persica (L.) Batsch] is affected by cultural practices, 2-year-old ‘Coronet’ trees growing in a peach tree short-life site were treated by soil fumigation with 1,2-dibromo-3-chloropropa…