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Septoria cannabis is a species of plant pathogen from the genus Septoria that causes the disease commonly known as Septoria leaf spot. Early symptoms of infection are concentric white lesions on the vegetative leaves of cannabis plants, followed by chlorosis and necrosis of the leaf until it is ultimately overcome by disease and all living cells are then killed.
Powdery mildew is one of the easier plant diseases to identify, as the signs of the causal pathogen are quite distinctive. Infected plants display white powdery spots on the leaves and stems. [1] This mycelial layer may quickly spread to cover all of the leaves.
Fungal diseases; Anthracnose Sphaceloma menthae. Black stem rot Phoma strasseri. Leaf blight Cephalosporium sp. Phoma leaf spot Phoma exigua. Powdery mildew Erysiphe spp. Erysiphe cichoracearum. Ramularia leaf spot Ramularia menthicola. Rust Puccinia menthae Puccinia angustata. Septoria leaf spot Septoria menthae. Stem and stolon canker ...
Fungal diseases; Common name: Scientific name: Plants affected: Anthracnose Glomerella cingulata Colletotrichum gloeosporioides [anamorph] C, D Brown leaf spot Paraphaeosphaeria obtusispora = Leptosphaeria obtusispora Coniothyrium henriquesii [anamorph] Y Fusarium leaf spot Fusarium moniliforme Gibberella fujikuroi [teleomorph] D Gray leaf spot ...
The leaf withers as the spots join together. Leaves then die and fall off [3]. In severe cases, only a few new leaves on the top of the plant are left [4]. More signs can be found under microscope [6]: Conidia can be taken from the black mats on lower leaf surface of infected leaves. These obclavate-cylindrical and slightly flexuous conidia ...
Cercospora is a genus of ascomycete fungi. Most species have no known sexual stage, and when the sexual stage is identified, it is in the genus Mycosphaerella. [2] Most species of this genus cause plant diseases, and form leaf spots.
A view of an infected pepper . Colletotrichum capsici has a broad host range but prefers peppers, yams and eggplants. On chili peppers, Capsicum annuum L., C. capsici infect the stem, fruit, and leaves of the plant, causing anthracnose, die-back and ripe fruit rot.
Cristulariella depraedans, commonly known as gray mold spot, sycamore leaf spot or bull's eye spot, is a fungal pathogen that affects maple trees (genus Acer) and certain other woody and herbaceous species. In maples, the foliage becomes affected by small grey lesions which expand and coalesce, the leaves later wilting and falling from the tree ...