Black Rot (Grape)
Phyllosticta ampelicida
Basic Details
Description
Taxonomy
Features
Translations
Basic Details
NameBlack Rot (Grape)
DescriptionBlack rot turns healthy grape berries into hard, shriveled black 'mummies'. Identify reddish-brown leaf spots with black dots early to save your fruit clusters.
TypeFungus
FamilyBotryosphaeriaceae
GenusPhyllosticta
Taxonomy & Features
PhylumAscomycota
SubphylumPezizomycotina
ClassDothideomycetes
OrderBotryosphaeriales
Features
- A serious fungal disease of grapes (Phyllosticta ampelicida / Guignardia bidwellii) native to North America
- Affects all green parts of the vine. On leaves, it forms small, circular, reddish-brown spots with dark borders
- Characteristic tiny black dots (pycnidia) often form a ring inside the leaf spots. These are the fungal fruiting bodies
- Fruit symptoms appear when berries are half-grown: a small whitish spot rapidly expands to rot the entire berry in 2-3 days
- Infected berries shrivel and turn into hard, wrinkled, purple-black 'mummies' that often remain attached to the cluster
- These mummies are covered in pycnidia and serve as the primary source of infection for the next growing season
- Thrives in warm, humid weather. Spores are released from mummies during rain and are carried by wind to new growth
- Can cause 100% crop loss if not managed, especially in susceptible varieties like Concord or Pinot Noir
- Prevent by removing and destroying all mummified clusters during winter pruning. Ensure good sunlight and air exposure in the vine canopy
- Apply protective fungicides (like mancozeb or myclobutanil) starting when shoots are 2-4 inches long and continuing through fruit set
Names in Different Languages
Latin / ScientificPhyllosticta ampelicida
English (Alternate)Grape black rot
Hindiअंगूर की काली सड़न (Angur ki kali sadan)
Tamilதிராட்சை கருப்பு அழுகல் (Thiratchai karuppu azhukal)
Teluguద్రాక్ష నలుపు కుళ్లు తెగులు (Draksha nalupu kullu tegulu)
Malayalamമുന്തിരിയിലെ ബ്ലാക്ക് റോട്ട് (Muntiriyile blākk rōṭṭ)
Kannadaದ್ರಾಕ್ಷಿ ಕಪ್ಪು ಕೊಳೆ ರೋಗ (Drākṣi kappu koḷe rōga)
Sanskritकाल-सड़न-रोग (Kāla-saḍana-roga)
Bengaliআঙ্গুর এর ব্ল্যাক রট (Angur er black rot)
Frenchblack rot de la vigne
Russianчерная гниль винограда (chernaya gnil' vinograda)
Spanishpodredumbre negra de la vid
GermanSchwarzfäule der Rebe
