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Phomopsis blight of juniper is a foliar disease discovered in 1917 [1] caused by the fungal pathogen Phomopsis juniperovora.The fungus infects new growth of juniper trees or shrubs, i.e. the seedlings or young shoots of mature trees.
Forsythia are deciduous shrubs typically growing to a height of 1–3 m (3 ft 3 in – 9 ft 10 in) and, rarely, up to 6 m (20 ft) with rough grey-brown bark. The leaves are borne oppositely and are usually simple, though sometimes trifoliate with a basal pair of small leaflets; they range between 2 and 10 cm (0.79 and 3.94 in) in length and, rarely, up to 15 cm (5.9 in), with a margin that is ...
Aster yellows is a chronic, systemic plant disease caused by several bacteria called phytoplasma. [1] The aster yellows phytoplasma (AYP) affects 300 species in 38 families of broad-leaf herbaceous plants, primarily in the aster family, as well as important cereal crops such as wheat and barley.
Plant diseases are diseases in plants caused by pathogens (infectious organisms) and environmental conditions (physiological factors). [1] Organisms that cause infectious disease include fungi , oomycetes , bacteria , viruses , viroids , virus -like organisms, phytoplasmas , protozoa , nematodes and parasitic plants . [ 2 ]
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.
Female cicadas use a saw-like appendage on their abdomens to slice the undersides of 1/8- to 1/2-inch diameter twigs to deposit their eggs, according to the Missouri Department of Conservation ...
Viral diseases; Common/species name: Genus name: Plants affected: Aneilema virus (AV) Potyvirus: A,C,M,Ti Brome mosaic virus (BMV) Bromovirus: C Clover yellow vein virus (CYVV) Potyvirus: G,T,Ti Commelina mosaic virus (CoMV) Potyvirus: C,R Cucumber mosaic virus (CMV) Cucumovirus: C,M Tobacco mild green mosaic virus (TMGMV = U2-TMV) Tobamovirus: R
Candidatus Phytoplasma fraxini is a species of phytoplasma, a specialized group of bacteria which lack a cell wall and attack the phloem of plants. [1] This phytoplasma causes the diseases ash yellows and lilac witches' broom.