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Stem canker on sunflower is caused by the fungal pathogen Phomopsis helianthi (teleomorph = Diaporthe helianthi). [1] There are many "Phomopsis" species that have a broad host range, but "Phomopsis helianthi" is the primary pathogen that infects sunflower, although it has also been seen to infect other, secondary hosts.
Soybean stem canker stem browning. Disease symptoms occur primarily on the stems, leaves and can lead to whole plant symptoms. [2] Reddish brown lesions on the lower stem of soybean plants progress into brown cankers. In some cases, the disease can spread to all parts of the stem. Stem girdling can result in premature plant death. [2]
Hemp canker Sclerotinia sclerotiorum: Leptosphaeria blight Leptosphaeria cannabina Leptosphaeria woroninii Leptosphaeria acuta. Olive leaf spot Cercospora cannabis Pseudocercospora cannabina. Ophiobolus stem canker Ophiobolus cannabinus Ophiobolus anguillides. Phoma stem canker Phoma herbarum Phoma exigua. Phomopsis stem canker Phomopsis cannabina
The following are examples of disease management plans used to control macrocyclic and demicyclic diseases: Macrocyclic disease: Developing a management plan for this type of disease depends largely on whether the urediniospores (rarely termed the "repeating stage") occur on the economically important host plant or the alternate host.
Following the colonization of the intercellular spaces, the fungus will reach a vascular strand and spread down the stalk between the leaf and the stem. The disease will spread into as well as between the cells of the xylem. This colonization leads to the invasion and destruction of the stem cortex, which leads to the formation of stem canker. [7]
The Mayo Clinic diet, a program that adheres to this notion, was developed by medical professionals based on scientific research, so you can trust that this program is based on science, and not ...
Fusarium circinatum is a fungal plant pathogen that causes the serious disease pitch canker on pine trees and Douglas firs (Pseudotsuga menziesii).The most common hosts of the pathogen include slash pine (Pinus elliottii), loblolly pine (Pinus taeda), Monterey pine (Pinus radiata), Mexican weeping pine (Pinus patula), and Douglas fir. [1]
The disease is noted by cankers, leaf spots, and necrosis, as well as twig dieback. [1] On healthy leaves, the necrosis begins apically at the margins, extending back along the midrib, occasionally reaching the base and causing complete blight of the leaf. Twig dieback also starts apically and works towards the center of the plant.