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The raspberry spur blight fungus spreads through the pycniospores that are released from the pycnidia. The spores are released and infect other raspberry plants with the help of rain through open wounds or natural openings. [7] The fungus will then spread throughout the plant and will live in lesions during the winter to survive.
A raspberry leaf spot infection initially causes dark green circular spots on the upper side of young leaves, which will eventually turn tan or gray. [3] These spots are typically 1–2 millimetres (0.039–0.079 in) in diameter, but can get as big as 4–6 millimetres (0.16–0.24 in). [4]
Raspberry ringspot virus (RRSV) is a plant pathogenic virus of the family Secoviridae. It was first described by Cadman in 1958. It causes ringspots in raspberries and strawberries and can cause rasp-leaf symptoms in cherry. It also has been found in many other plants including those in the Vitis and Narcissus genera.
The pathogen, commonly referred to as ArMV, is from the family Secoviridae, and it causes yellow dwarf of raspberry and is one of the causes of mosaic of rhubarb. [2] Arabis mosaic virus infects multiple hosts, including strawberries, hops, hemp, grape, geraniums, raspberries, sugar beets, celery, horseradish, lilac, peach, and lettuces. [2] [3]
Raspberries are vigorous and can be locally invasive. They propagate using basal shoots (also known as suckers), extended underground shoots that develop roots and individual plants. They can sucker new canes some distance from the main plant. For this reason, raspberries spread well, and can take over gardens if left unchecked.
The most common example of this is found in the red raspberry. When the red raspberry plant is infected, the virus influences it to produce more GLVs, which attract the red raspberry aphid. [9] These GLVs cause more aphids to come and to feed on the plant for longer, giving the virus better chances of being ingested and spread more widely. [9]
Rubus glaucifolius is a North American species of wild raspberry known by the common name San Diego raspberry. It is native to Oregon and California, where it grows in mountain forests. [2] Rubus glaucifolius is a tangling shrub with very slender, lightly prickly stem spreading and branching outward. The leaves are each made up of usually three ...
Phytophthora fragariae is a fungus-like plant pathogen that causes red stele, otherwise known as Lanarkshire disease, in strawberries.Symptoms of red stele can include a red core in the roots, wilting of leaves, reduced flowering, stunting, and bitter fruit.