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Slime flux, also known as bacterial slime or bacterial wetwood, is a bacterial disease of certain trees, primarily elm, cottonwood, poplar, boxelder, ash, aspen, fruitless mulberry and oak. A wound to the bark, caused by pruning, insects, poor branch angles or natural cracks and splits, causes sap to ooze from the wound. Bacteria may infect ...
Pseudomonas amygdali pv. mellea causes disease on tobacco plants. Pseudomonas amygdali pv. mori is pathogenic on mulberry trees. Pseudomonas amygdali pv. morsprunorum causes disease on cherries and plums. Only certain strains of this pathovar belong to this phylogenetic group, whereas the other are classified in genomospecies 3. [3] [4]
The mulberry fruit is a multiple, about 2–3 centimetres (3 ⁄ 4 – 1 + 1 ⁄ 4 inches) long. [2] [6] Immature fruits are white, green, or pale yellow. [6] The fruit turns from pink to red while ripening, then dark purple or black, and has a sweet flavor when fully ripe. [2] [6]
References to diseases now known to be caused by phytoplasmas can be found as far back as 1603 (mulberry dwarf disease in Japan). [4]Such diseases were originally thought to be caused by viruses, which, like phytoplasmas, require insect vectors and cannot be cultured.
Morus alba, known as white mulberry, common mulberry and silkworm mulberry, [2] is a fast-growing, small to medium-sized mulberry tree which grows to 10–20 m (33–66 ft) tall. It is native to China and India and is widely cultivated and naturalized elsewhere.
The red mulberry cannot be used for silk production as the white mulberry. Silkworms reject the leaves of the red mulberry. [36] The red mulberry cannot be used as a short-term solution, due to the time until the first fruit bearing. Instead, it requires long-term planning. The highest yields are obtained after 30–85 years. [37]
Morus nigra is a deciduous tree growing to 12 metres (39 feet) tall by 15 m (49 ft) broad. The leaves are 10–20 centimetres (4–8 inches) long by 6–10 cm (2–4 in) broad – up to 23 cm (9 in) long on vigorous shoots, downy on the underside, the upper surface rough with very short, stiff hairs.
The leaves are much like the flowers when analyzing diversity. The leaves can be singly attached to the stem or alternating, they may be lobed or unlobed, and can be evergreen or deciduous depending on the species in question. [citation needed] The red mulberry can host numerous leaf types on the same tree. Leaves can be both lobed and unlobed ...