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Shot hole disease is a major concern of the stone fruit industry. It is estimated that 80% of the California almond crop may be infested with shot hole disease, resulting in a potential yield loss of 50-75%. [3] In the 1930s, it was found that applications of Bordeaux mixture reduces shot hole disease on peaches from 80% to 9%.
Cabbage - distorted leaves, hollow areas in stems. Cauliflower - poor development of curds, and brown patches. Stems, leafstalks and midribs roughened. Celery - leaf stalks develop cracks on the upper surface, inner tissue is reddish brown. Celeriac - causes brown heart rot. Mango - fruits show internal lesions and cracking
The genera Brunfelsia, Plowmania, Fabiana, Nierembergia and Petunia furnish garden plants bearing attractive flowers.Brunfelsia and Plowmania are genera of tropical shrubs requiring glasshouse protection in temperate climate areas; Fabiana species are hardy shrubs; Nierembergia species are dwarf, hardy herbaceous perennials or sub-shrubs, and Petunia × atkinsiana has yielded a huge variety of ...
Leaf scorch / Golden death: Xylella fastidiosa [1] [2] Bacterial blast: Pseudomonas syringae [3] Bacterial canker: Pseudomonas syringae pv. syringae [2] Bacterial hyperplastic canker: Pseudomonas amygdali: Bacterial spot: Xanthomonas pruni (syn. X. campestris pv. pruni) Crown gall: Agrobacterium tumefaciens [1]
Leaf gall (beet tumor, or crown wart) Physoderma leproides = Urophlyctis leproides. Phoma leaf spot and root rot Phoma betae: Phymatotrichum root rot (cotton root rot) Phymatotrichopsis omnivora = Phymatotrichum omnivorum. Phytophthora wet rot Phytophthora drechsleri: Powdery mildew Erysiphe polygoni = Erysiphe betae. Pythium root rot Pythium ...
They can start new infections in new, green leaves and serve as the primary inoculum in each new growing season. The ascospores can stick to the leaf and, given a film of water and optimal temperature, germinate within hours of adhesion. Upon germination, hyphae can grow into the leaf via stomata (natural openings) on the underside of the leaf. [8]
Alternaria leaf spot or Alternaria leaf blight are a group of fungal diseases in plants, that have a variety of hosts. [ 1 ] [ 2 ] [ 3 ] The diseases infects common garden plants, such as cabbage, and are caused by several closely related species of fungi. [ 4 ]
Ruellia simplex is an evergreen perennial growing 3 ft (0.91 m) tall, forming colonies of stalks with lance-shaped leaves that are 6 to 12 in (15 to 30 cm) long and .5 to .75 in (1.3 to 1.9 cm) wide. The flowers are metallic blue to purple, trumpet-shaped with an about 2 in (5.1 cm)-wide, five-lobed corolla .