Definitions for black knot
black knot

Princeton's WordNetRate this definition:0.0 / 0 votes

1. black knotnoun

   disease of plum and cherry trees characterized by black excrescences on the branches

WikipediaRate this definition:0.0 / 0 votes

1. black knot

   Dibotryon morbosum or Apiosporina morbosa is a plant pathogen, which is the causal agent of black knot. It affects members of the Prunus genus such as; cherry, plum, apricot, and chokecherry trees in North America. The disease produces rough, black growths that encircle and kill the infested parts, and provide habitat for insects. The disease was first described in 1821 in Pennsylvania, but has spread across North America. While it was one of the most destructive diseases of plum and cherry trees in the late 19th century, today it is relatively well controlled in many cultivated areas and seen primarily in poorly managed orchards, or where strongly established, including in the wild. Many urban centres in North America have black knot control programs. Black knot occurs only on the woody parts of trees, primarily on twigs and branches, but can spread to larger limbs and even the trunk. Olive-green swellings from the disease are visible in the late spring; as it spreads and matures, typically by autumn, rough black knots circle and kill affected parts. The knots vary in diameter from one inch to one foot (2.5–30 cm). Older knots can kill trees by promoting insect infestations. The most common treatments are pruning infected parts during the winter and spraying buds with a fungicide. Nearby wild plants with the disease must also be treated.

ChatGPTRate this definition:0.0 / 0 votes

1. black knot

   Black knot is a fungal disease that primarily affects Prunus species, such as plum and cherry trees. It is characterized by the growth of black, irregularly shaped galls or knots on the branches and stems of trees. The disease is caused by the fungus Apiosporina morbosa and can cause severe damage or even death to affected trees if left untreated.

Matched Categories

1. • Plant Disease

How to pronounce black knot?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say black knot in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of black knot in Chaldean Numerology is: 2

2. Pythagorean Numerology

   The numerical value of black knot in Pythagorean Numerology is: 8

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=black knot
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Black_Knot
3. ^ ChatGPT
   https://chat.openai.com