Resistance of Crapemyrtles:Table 1: Susceptibility of Crapemyrtles to Powdery Mildew and Cercospora Leaf Spot

TABLE 1. SUSCEPTIBILITY OF CRAPEMYRTLE (L. INDICA) CULTIVARS TO POWDERY MILDEW AND CERCOSPORA LEAF SPOT
Cultivar	Blossom color	Growth habit¹	Powdery mildew²			Cercospora leafspot³
Cultivar	Blossom color	Growth habit¹	1995	1996	1997	1995	1996	1997
L. indica
Carolina Beauty	Red	LT	2.3	1.6	1.2	5.8	6.3	5.8
Catawba	Purple	ST	0.7	0.1	1.2	3.6	4.6	3.0
Centennial Spirit	Red	ST	1.6	0.0	0.8	2.2	4.8	5.0
Cherokee	Red	SD	0.0	0.0	NR⁴	2.3	4.0	NR
Country Red	Red	ST	2.8	2.5	0.9	4.0	4.6	5.0
Glendora White	White	SD	0.4	0.4	0.5	2.3	3.7	3.8
Gray's Red	Red	ST	2.2	0.8	1.0	3.5	3.9	4.3
Hardy Lavender	Lavender	LT	1.1	1.1	1.8	4.2	5.1	5.0
Majestic Beauty	White	SD	1.7	1.0	1.0	3.7	5.3	5.0
Near East	Light pink	ST	0.3	0.0	1.3	5.0	5.4	4.7
Orbin Adkins	White	ST	2.4	0.7	1.2	5.7	6.8	6.8
Peppermint Lace	Pink/white edges	D	1.7	1.0	1.6	4.0	5.6	4.9
Potomac	Pink	ST	1.8	0.3	0.9	2.7	4.5	3.6
Powhatan	Purple	ST	1.3	1.1	1.8	3.4	5.5	5.5
Raspberry Sundae	Deep red	SD	3.1	1.5	1.5	4.6	5.7	5.3
Regal Red	Red	ST	0.6	1.2	1.3	2.1	4.0	4.2
Seminole	Pink	ST	0.8	0.3	2.2	3.3	5.6	4.5
Velma's Royal Delight	Purple	D	1.2	0.6	1.4	2.0	3.3	3.7
William Toovey	Pink/red	ST	1.9	1.3	1.8	3.7	4.4	3.6
Wonderful White	White	LT	2.4	1.5	1.3	5.0	6.8	6.8
¹D = dwarf form (3-5 feet), SD = semi-dwarf (5-10 feet), ST = small tree (10-20 feet), LT = large tree (20 feet or larger).
²Powdery mildew was rated on a scale of 0 to 4 where 0 = no disease, 1 = 1 to 25%, 2 = 26 to 50%, 3 = 51 to 75%, 4 = 76 to 100% of the leaves damaged or colonized E. lagerstroemia.
³Cercospora leaf spot was evaluated using the Barratt and Horsfall System: 1 = 0%, 2 = 0 to 3%, 3 = 3 to 6%, 4 = 6 to 12%, 5 = 12 to 25%, 6 = 25 to 50%, 7 = 50 to 75%, 8 = 75 to 87%, 9 = 87 to 94%, 10 = 94 to 97%, 11 = 97 to 100%, 12 = 100%.
⁴NR = data not recorded or available.