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Listing 1 - 6 from 6 for hybrid rhododendron

... spring on azaleas and occasionally occurs on rhododendrons. Some native Rhododendron sp. (azaleas) are more susceptible than hybrid rhododendrons. The leaves and entire shoots become thickened, curled, ... hybrid rhododendron is a foliar disease caused by several species of the fungus Phytophthora. In North Carolina, P. cactorum, and P. citricola have been isolated from diseased plants. Rhododendron ...
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Richard E. Bir
... Amer. Gardener. 79(3):52. Bir, Richard E. 1999. Increase Rhododendron Flowering. NMPRO15(11):31-34. Bir, Richard E. and Richard ... E. and Joseph L. Conner. 1998. Increasing flowers on container grown hybrid rhododendron. Proc. SNA Res. Conf. 43:282-285. Bir, R. E. and ... propagators. Proc. IPPS 47:495-497. Bir, Richard E. 1997. Rhododendron maximum for the Next Millennium. Proc. IPPS 47:548-550. Bir, ...
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OD13 - ORNAMENTAL DISEASE NOTE NO. 13 PHYTOPHTHORA ROOT ROT AND ITS CONTROL ON ESTABLISHED WOODY ORNAMENTALS
... Phytophthora root rot on rhododendron. Note the leaf droop which resembles drought stress. On azalea the symptoms vary with the cultivar (Figure 1). On Kurume hybrid types, such as ... and others are resistant. The rhododendron hybrids: Caroline, Martha Isaacson, Professor Hugo de Vries and Red Head are considered resistant. Resistant azalea cultivars include Rhododendron poukhanese, Formosa, Fakir and ...
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Azalea Diseases in the Landscape
... . Symptoms The symptoms of Phytophthora root rot vary with the cultivar. On Kurume hybrid types, such as Coral Bells, Sherwood Red, Hinodegiri, and Hino Crimson, new leaves ... Leaf Rust Leaf rust caused by the fungus Pucciniastrum vaccinii attacks deciduous azaleas including Rhododendron periclymenoides (R. nudiflorum, Pinxterbloom azalea), R. prunifolum (Plumleaf azalea), and R. viscosum (Swamp ...
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Drought Tolerant Shrubs
... to 5 Sun Lavandula angustifolia Common lavender E 1 to 2 Sun Lavandula x intermedia Hybrid lavender E 1 to 2 Sun Lespedeza thunbergii Thunberg lespedeza D 3 to 6 Sun ... hystrix Needle palm E 6 to 8 Sun, partial shade Rhododendron austrinum Florida azalea D 8 to 10 Partial shade Rhododendron calendulaceum Flame azalea D 4 to 8 Partial shade Rhodotypos scandens ...
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Optimum pH Ranges for Select Plants
... .5 Pieris 5.0-6.0 Quince, flowering 6.0-7.0 Rhododendron 4.5-6.0 Rose, hybrid tea 5.5-7.0 Snowball bush 6.5-7.5 Fruits/Nuts ...
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