|
Diseases and Pests of Grapes |
|
"Twenty
Years of Grape Breeding in the Tropics: The Stress Pathogen Botryodiplodia
Confused the Ability to Select for Resistance to Pierce's Disease" ActaHort offers for-pay access to their enormous body of technical horticultural publications. However, the Abstracts are posted publicly, and they are excellent. ActaHort is a trove. |
|
"Diseases
of Grapevine in Missouri" "Fungal diseases present a major limiting factor of grapevine cultivation in Missouri and in several mid-western states." "Black Rot" - "Downy Mildew" - "Macrophoma Rot" - "Phomopsis on Cane/Leaf" - "Phomopsis on Fruit/Rachis" - "Powdery Mildew" - "Anthracnose" - "Eutypa Dieback" |
|
Anthracnose |
|
Anthracnose
in Missouri "Anthracnose causes damage most frequently by weakening the canes, and thereby predisposing them to breakage in windy weather. The disease proves to be difficult to control once it established itself during the growing season." |
|
Black Rot |
|
Black
Rot in Missouri "Black rot is the most important limiting factor of grape production in Missouri. It develops in every growing season, and, if left uncontrolled, it will destroy fruit on most cultivars." |
|
Downy Mildew |
|
Downy
Mildew in Missouri "The conditions of the Missouri summer are highly favorable for downy mildew. Fortunately, most hybrid and native American grape varieties grown in the state offer some genetic resistance to this disease. Vinifera varieties, however, are extremely susceptible to downy mildew, and need to be painstakingly protected." |
|
Eutypa Dieback |
|
"Eutypa
Dieback" "Although eutypa dieback is present in Missouri, the disease is not considered economically important." |
|
Macrophoma Rot |
|
Macrophoma
Rot in Missouri "The pathogen that causes macrophoma rot is a common microorganism in Missouri. The disease used to be known as a fruit rot of muscadine grapes only, but more and more recent observations suggest that it also is an important problem in grape varieties grown in Missouri." |
|
Phomopsis |
|
Phomopsis
on Cane/Leaf in Missouri "Phomopsis is a cool climate disease that develops in Missouri only when the weather is cool and wet during the early part of the growing season. In a dry or warm spring, the disease will not appear." |
|
Phomopsis
on Fruit/Rachis in Missouri "The fruit rot/rachis blight stage of the disease occurs in Missouri only when the weather turns cool and rainy at the end of July or early August. While such summer conditions are relatively rare, they do occur occasionally and allow the disease to cause serious damage to the fruit." |
|
Pierce's Disease |
|
|