Leaf Spots on Vegetable PlantsLowell L. Black
The meaning of ANGULAR LEAF SPOT is a disease of plants in which the leaf spots have angular and usually sharply limited outlines (as that of cotton caused by the bacterium Xanthomonas malvacearum and that of cucumber caused by the bacterium Pseudomonas
any of various plant diseases characterized by the formation of spots on the leaves. [1900–05] Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved. ...
Water-soaked black and brown spots on plant leaves and stems often indicatea fungal or bacterial diseaseis the problem. Adjust the watering schedule and do not allow plants to sit in excess water. Often that alone is enough to stop the disease's progress. Remove and dispose of any soft, d...
The disease appears first in the older growth of the plant but it can affect tomato plants of all ages and stages. It can cause problems both for the leaves as well as for the calyxes and blossoms. It does not affect the fruits – if you notice spots on your tomatoes, it’s likely...
Bacterial leaf spot is a plant disease that causes spots, often water-soaked, that spread across the plants’ foliage. Spots can be yellow, brown, or black. Infestations start small, appearing on just the foliage, fruit, or stems at first. ...
Field assessment of antifungal activity of aqueous plants extracts in management of leaf spot of groundnut (Arachis hypogaea L.) in Burkina Faso Early and late leaf spots, two fungal diseases of groundnut caused by Cercospora arachidicola Hori. and Phaeoisariopsis personata (Berk and Curt), res...
During a survey in 2011–2012, three ornamental plants of Araceae namely Aglaonema nitidum, Syngonium podophyllum and Dieffenbachia amoena showing fol
Symptoms on leaves first appear as round, irregular straw to pale brown spots which later on turn into brown blighted areas, often with concentric rings. The pathogenicity tests were conducted by spraying healthy leaves of with conidial suspension. Control plants were sprayed with distilled water. ...
While those leaves are shriveling and falling, the fungus will spread to the other leaves. The spots enlarge, preventing the leaves from photosynthesizing. As a result, the plants don’t get enough nutrition. More necrotized leaf fall means eventual plant death. ...