Leaf-scorch

The need for effective bactericides is greater today than at any time in history. The recognition that mycoplasma-like organisms and xylem-limited bacteria cause plant disease means that there are additional diseases that are amenable to control with antibiotic-like compounds. X-disease, pear decline, peach yellows, phony peach, and plum leaf scorch are a few examples of diseases on deciduous tree-fruit crops caused by phytopathogenic prokaryotes. 

Gnomonia leaf scorch dried-up leaf trusses in winter count not determined if infection is severe treatments at budburst and April to mid-May... 

Leaves with brown, dry edges. Cause Leaf scorch. Caused by lack of water or reflected heat from surrounding pavement, this damage is often a problem on newly planted trees.. Avoid by keeping soil around the tree evenly moist a 2"-.3 thick layer of mulch -seeps roots cool and retains moisture. 

Leaves with spots. Causes Leaf spot leaf blight leaf scorch. Leaf spot causes small purple spots that develop tan centers on foliage. See page 218 for an illustration of leaf spot. Leaf blight is characterized by oval or V-shaped spots with purple centers and tan borders. Irregular, purplish blotches are the symptoms of leaf scorch. When severe, these diseases kill leaves, which weakens plants. Berries are... 

Scolytus rugulosus. See Shothole borers Scorch, leaf. See Leaf scorch Scurf... 

Lilium sp. (Liliaceae) Zig-Zag line pattern in leaves Leaf scorch or leaf bum Mexico Poland Cortes-Martinez et al. (2007) Kamiriska and Sliwa (2008b)... 

Lilium sp. (Liliaceae) Lilium virescence Zig-Zag line pattern in leaves of Lilium Leaf scorch or leaf bum of Lilium Virescence and alteration of reproductive structure Zig-zag lines between midribs of leaves, dwarfism Leaf malformation and necrosis and flower bud abscission Bertaccini and Marani (1982) Cortes-Martinez et al. (2007) Kaminska and Sliwa (2008b)... 

Kaminska, M. and Sliwa, H. (2008b). First report of Candidates Phytoplasma mali in oriental lilies and its association with leaf scorch in Poland. Plant Pathology, 57 363. 

All eeieals Ascochyta leaf scorch (spot) Didymella exitialis... 

A potassium deficiency can cause leaf-scorch flavescence and premature leaf-drop—and in consequence a decrease in grape sugar and phenolic compound concentrations. Black leaf, encouraged by overproduction and soil dryness, often accompanies potassium deficiencies. 

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