Black patch

On the slopes of Popacatepetl the sacred mushrooms are still taken with colorines. It is vital that the hilum be in the red field if it is in the black patch, it is the toxic seed of Abrus precatorius L., also called coloring (sic) and much used for beads by the Veracruzanos. 

Figure 17. Top Surface map of HSA showing positive (light gray) and negative (dark gray) charge distributions. The crevice is shown in the center with tryptophan (black patch in white circle) sitting at its bottom. Bottom Schematic representation of conformational transitions, from the contracted configuration in basic pH, to the flexible globule structure at neutral pH, and to the extended form in acidic pH. The location of W214 is indicated by the white dot in domain IIA.

Fig. 11 represents macroscopically the flux of spillover oxygen O which can either reoxidise a prereduced surface, or reoxidise continuously the active sites which have been accidentally reduced (the second case is chosen in the representation of fig. 11, with the black patches corresponding to active sites, but the phenomenon is identical in both cases). It is clear that the more is present in the mixture, the more O o can flow to M0O3, and... 

NATURE OF DAMAGE. Yellow-orange eggs are seen on the shoots in March and April. The bug-like larvae can be found on the leaves, shoots and axils, surrounded by sticky honeydew. Black patches are later found on fruit, leaves and shoots. 

Other fungal diseases cause swellings on plant parts, such as black knot of plum and cherry, or sunken areas in stems, as with Cytospora canker. On fruit, fungi can cause hard, black patches (scab), soft spots (rot), or fuzzy gray mold (Botrytis rot). 

Leaves with white, gray, or black patches. Pages 381-82. 

It can cause ochronosis the patient soon develops a blue-black patch that is not easy to treat. Ochronosis can appear even if the patient has not had a peel beforehand. Ochronosis usually appears after concentrations higher than 4% have been applied, but lower concentrations can cause it in patients with Fitzpatrick skin type V or VI. 

Infected plants show red/ black patches on stem base, causes plants to be stunted or lodge. 

F. I Diagriosis. Identification of "black patch disease by a plant pathologist correlated with... 

Fig. 10. Sequences of 15 consecutive images of spiral waves experimental data (A) and simulation data (B). Black patches and contour lines indicate minimum and maximum oxidation levels, respectively. Image sizes 7x7 mm (A) 5.4 x 5.4 mm (B).

Figure 1.5. A longitudinal cross-section of domatia, in an internode of the plant Leonardoxa africana africana, a small tree in the forests of Cameroon, where the plant-ant Petalomyrmex phylax establishes its colonies. A fungus of the order Chaetothyriales is the third partner of this interaction it is discrete yet visible (the black patch covering part of the inner surface of the domatium) (photo Rumsai s Blatrix)...

A toxicity problem associated with second-cutting red clover hay was reported in 1959 in Missouri, Cattle and sheep which were fed such hay slobbered excessively, went off feed, developed diarrhea and stiff joints, and sometimes died. A similar disorder in ruminants was investigated in Illinois in 1961 however, the causal agent was not identified. Similar cases were reported in Wisconsin in 1962 and 1963 this finally led to the isolation of a toxinogenic strain of Rhizoctonia leguminicola, the cause of the black patch disease of red clover. It was concluded that the salivation factor was contained in the mycelium of the R. leguminicola and that it was not a product of red clover per se (Rainey et ai, 1965 Aust and Broquist, 1965). 

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