Plant Diseases

Plant Diseases http://pubs.ext.vt.edu/category/plant-diseases.html en Fri, 01 May 2009 01:00:00 -0400 http://cyber.law.harvard.edu/rss/rss.html Winter Injury and Cool Temperatures Create Ideal Conditions for Botrytis in Strawberries* http://pubs.ext.vt.edu/2906/2906-1395/2906-1395.html Winter injury has left many dead leaves that will serve as a major source of Botrytis spores in the early spring season. Likewise, a number of plantings recently experienced freeze injury to emerged blooms. These dead flowers can become infected with Botrytis; the pathogen can grow down the peduncle and into the upper crown tissue to cause a Botrytis crown rot.

]]> Tue, 18 Aug 2009 11:48:18 -0400 http://pubs.ext.vt.edu/2906/2906-1395/2906-1395.html Use of In-furrow Fungicide Treatments and Seedpiece Dusts for Disease Control in White Potato http://pubs.ext.vt.edu/2906/2906-1394/2906-1394.html On the Eastern Shore of Virginia, potato growers plant potatoes in early spring for summer harvest. Fungicide dusts have been typically used to protect the potato seedpiece from infection when planted in cool, wet soil in the early spring.

]]> Tue, 18 Aug 2009 11:12:31 -0400 http://pubs.ext.vt.edu/2906/2906-1394/2906-1394.html Downy Mildew in Cucurbits: Occurence of QOI Resistance in the USA and Impact on Managing Disease http://pubs.ext.vt.edu/2906/2906-1385/2906-1385.html Strains of the cucurbit downy mildew fungus resistant to QoI (also known as strobilurin) fungicides were detected in GA and NC in fall 2004 and in FL in spring 2005. The genetic mutation detected is the same as that in QoI-resistant cucurbit powdery mildew fungal strains.

]]> Wed, 12 Aug 2009 11:08:17 -0400 http://pubs.ext.vt.edu/2906/2906-1385/2906-1385.html Successful No-Tillage Corn Production http://pubs.ext.vt.edu/424/424-030/424-030.html Wed, 29 Jul 2009 12:10:08 -0400 http://pubs.ext.vt.edu/424/424-030/424-030.html Strawberry Anthracnose Ripe Fruit Rot and Management Recommendations http://pubs.ext.vt.edu/2906/2906-1323/2906-1323.html Anthracnose symptoms on ripe strawberry fruit include typical sunken and round lesions with an orange discoloration within the lesion and brown spots on green fruit.

]]> Thu, 23 Jul 2009 10:34:12 -0400 http://pubs.ext.vt.edu/2906/2906-1323/2906-1323.html Actigard May Reduce Disease in Strawberry http://pubs.ext.vt.edu/2906/2906-1330/2906_1330.html One of the biggest problems facing strawberry production in Virginia is disease management.

]]> Tue, 14 Jul 2009 15:49:25 -0400 http://pubs.ext.vt.edu/2906/2906-1330/2906_1330.html Botryosphaeria Canker and Dieback of Trees and Shrubs in the Landscape http://pubs.ext.vt.edu/450/450-726/450-726.html Thu, 18 Jun 2009 09:16:23 -0400 http://pubs.ext.vt.edu/450/450-726/450-726.html Applied Research on Field Crop Disease Control 2008 http://pubs.ext.vt.edu/2905/2905-1294/2905-1294.html Cool temperatures and rainfall delayed planting of cotton and peanut until after 20 April in Virginia. Thereafter, rainfall was widely scattered and soil temperatures averaged above 60 ºF which allowed planting to proceed in a timely manner. Most crops showed good emergence after planting throughout Eastern Virginia, except for some stand losses in early plantings of corn.

]]> Wed, 13 May 2009 00:00:00 -0400 http://pubs.ext.vt.edu/2905/2905-1294/2905-1294.html Comparison of Yield, Maturity, Value and Susceptibility to TSWV in Virginia- and Runner-type Varieties of Peanut in 2004 http://pubs.ext.vt.edu/450/450-567/450-567.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-567/450-567.html Selected Vegetable Diseases http://pubs.ext.vt.edu/426/426-363/426-363.html A table of plant diseases.

]]> Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/426/426-363/426-363.html Problem-free Shrubs for Virginia Landscapes http://pubs.ext.vt.edu/450/450-236/450-236.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-236/450-236.html Problem-free Trees for Virginia Landscapes http://pubs.ext.vt.edu/450/450-237/450-237.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-237/450-237.html Applied Research On Field Crop Disease Control 2005 http://pubs.ext.vt.edu/450/450-564-05/450-564-05.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-564-05/450-564-05.html Applied Research On Field Crop Disease Control 2004 http://pubs.ext.vt.edu/450/450-564/450-564.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-564/450-564.html Iris Leaf Spot http://pubs.ext.vt.edu/450/450-600/450-600.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-600/450-600.html Juniper Tip Blights http://pubs.ext.vt.edu/450/450-601/450-601.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-601/450-601.html Botrytis Blight of Peony http://pubs.ext.vt.edu/450/450-602/450-602.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-602/450-602.html Powdery Mildew of Ornamental Plants http://pubs.ext.vt.edu/450/450-603/450-603.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-603/450-603.html Anthracnose - A Fungal Disease of Shade Trees http://pubs.ext.vt.edu/450/450-604/450-604.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-604/450-604.html Azalea Leaf and Flower Gall http://pubs.ext.vt.edu/450/450-605/450-605.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-605/450-605.html Black Root Rot of Japanese Holly http://pubs.ext.vt.edu/450/450-606/450-606.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-606/450-606.html Fire or Botrytis Blight of Tulip http://pubs.ext.vt.edu/450/450-607/450-607.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-607/450-607.html Crown Gall of Woody Ornamentals http://pubs.ext.vt.edu/450/450-608/450-608.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-608/450-608.html Entomosporium Leaf Spot of Photinia http://pubs.ext.vt.edu/450/450-609/450-609.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-609/450-609.html Fire Blight of Ornamentals http://pubs.ext.vt.edu/450/450-610/450-610.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-610/450-610.html Foliar Diseases of Dogwood http://pubs.ext.vt.edu/450/450-611/450-611.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-611/450-611.html Gray Leaf Spot Disease of Corn http://pubs.ext.vt.edu/450/450-612/450-612.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-612/450-612.html Hollyhock Rust http://pubs.ext.vt.edu/450/450-613/450-613.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-613/450-613.html Major Diseases of Boxwood http://pubs.ext.vt.edu/450/450-614/450-614.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-614/450-614.html Phytophthora Root Rot of Rhododendron and Azalea http://pubs.ext.vt.edu/450/450-615/450-615.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-615/450-615.html Powdery Mildew-Resistant Woody Ornamentals http://pubs.ext.vt.edu/450/450-616/450-616.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-616/450-616.html Rose Black Spot http://pubs.ext.vt.edu/450/450-617/450-617.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-617/450-617.html Sooty Mold of Conifers and Hardwoods http://pubs.ext.vt.edu/450/450-618/450-618.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-618/450-618.html Verticillium Wilt of Shade Trees http://pubs.ext.vt.edu/450/450-619/450-619.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-619/450-619.html Rose Rosette Disease http://pubs.ext.vt.edu/450/450-620/450-620.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-620/450-620.html Angular Leaf Spot of Cucumber http://pubs.ext.vt.edu/450/450-700/450-700.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-700/450-700.html Bacterial Spot of Pepper http://pubs.ext.vt.edu/450/450-702/450-702.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-702/450-702.html Blossom End Rot of Tomato http://pubs.ext.vt.edu/450/450-703/450-703.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-703/450-703.html Buckeye Rot of Tomato http://pubs.ext.vt.edu/450/450-704/450-704.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-704/450-704.html Clubroot of Crucifers http://pubs.ext.vt.edu/450/450-705/450-705.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-705/450-705.html Corn Smut http://pubs.ext.vt.edu/450/450-706/450-706.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-706/450-706.html Downy Mildew of Cucurbits http://pubs.ext.vt.edu/450/450-707/450-707.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-707/450-707.html Early Blight of Tomatoes http://pubs.ext.vt.edu/450/450-708/450-708.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-708/450-708.html Plectosporium Blight of Cucurbits http://pubs.ext.vt.edu/450/450-709/450-709.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-709/450-709.html Powdery Mildew of Cucurbits http://pubs.ext.vt.edu/450/450-710/450-710.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-710/450-710.html Septoria Leaf Spot of Tomato http://pubs.ext.vt.edu/450/450-711/450-711.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-711/450-711.html Timber Rot of Tomato http://pubs.ext.vt.edu/450/450-712/450-712.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-712/450-712.html Wire Stem and Bottom Rot of Cabbage http://pubs.ext.vt.edu/450/450-713/450-713.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-713/450-713.html Anthracnose on Snap Beans http://pubs.ext.vt.edu/450/450-719/450-719.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-719/450-719.html Brown Rot on Peach and Other Stone Fruits http://pubs.ext.vt.edu/450/450-721/450-721.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-721/450-721.html Reducing Pesticide Use in the Home Lawn and Garden http://pubs.ext.vt.edu/450/450-725/450-725.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-725/450-725.html Asian Soybean Rust - Frequently Asked Questions I: Background and General Information http://pubs.ext.vt.edu/450/450-301/450-301.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-301/450-301.html Asian Soybean Rust - Frequently Asked Questions II: Identification, Biology, and Ecology http://pubs.ext.vt.edu/450/450-302/450-302.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-302/450-302.html Asian Soybean Rust - Frequently Asked Questions III: Control with Fungicides http://pubs.ext.vt.edu/450/450-303/450-303.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-303/450-303.html Asian Soybean Rust - Frequently Asked Questions IV: Cropping Systems and Cultural Practices http://pubs.ext.vt.edu/450/450-304/450-304.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-304/450-304.html Asian Soybean Rust - Frequently Asked Questions V: Monitoring, Tracking, and Scouting http://pubs.ext.vt.edu/450/450-305/450-305.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-305/450-305.html Asian Soybean Rust - Frequently Asked Questions VI: Sprayer and Nozzle Technology http://pubs.ext.vt.edu/450/450-306/450-306.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-306/450-306.html Soybean Disease Control: Response of Soybeans to Foliar Sprays of Fungicides in 2005 http://pubs.ext.vt.edu/450/450-561/450-561.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-561/450-561.html Soybean Rust Incidence and the Response of Soybeans to Foliar Fungicides in 2006 http://pubs.ext.vt.edu/450/450-562/450-562.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/450/450-562/450-562.html Applied Research on Field Crop Disease Control 2007 http://pubs.ext.vt.edu/2808/2808-1005/2808-1005.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/2808/2808-1005/2808-1005.html Fusarium Wilt of Mimosa (Albizia julibrissin) http://pubs.ext.vt.edu/2811/2811-1020/2811-1020.html Fusarium wilt is a common and lethal disease of mimosa (Albizia julibrissin)1, also commonly known as silktree. In the United States this disease occurs in the east from New York southward and also in Louisiana, Arkansas and California. Fusarium wilt is caused by the fungus Fusarium oxysporum forma specialis perniciosum. This pathogen causes Fusarium wilt on Albizia species and also on tree-ofheaven (Ailanthus altissima). Fusarium oxysporum f. sp. perniciosum colonizes and clogs the tree's vascular (water-conducting) tissue, and interferes with the movement of plant sap. This results in relatively rapid tree death.

]]> Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/2811/2811-1020/2811-1020.html Pest Management Guide: Field Crops, 2009 http://pubs.ext.vt.edu/456/456-016/456-016.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/456/456-016/456-016.html Pest Management Guide: Horticultural and Forest Crops, 2009 http://pubs.ext.vt.edu/456/456-017/456-017.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/456/456-017/456-017.html Pest Management Guide: Home Grounds and Animals, 2009 http://pubs.ext.vt.edu/456/456-018/456-018.html Fri, 01 May 2009 01:00:00 -0400 http://pubs.ext.vt.edu/456/456-018/456-018.html Applied Research On Field Crop Disease Control 2006 http://pubs.ext.vt.edu/424/424-236/424-236.html Tue, 28 Apr 2009 16:49:10 -0400 http://pubs.ext.vt.edu/424/424-236/424-236.html