leaf yellowing host:ohioline.osu.edu

Listing 1 - 10 from 16 for leaf yellowing

Diseases of Ground Cover Plants, HYG-3064-96
... in the spring until plant growth slows in mid or late summer. Bacterial Leaf Spot of English Ivy Leaf spots, caused by the bacterium Xanthomonas campestris pathovar hederae, will appear light ... of the spot. This is especially visible when viewed from the leaf undersurface. Petiole and stem cankers may develop, causing leaf yellowing and shoot die-back. Wet weather or frequent overhead watering, ...
ohioline.osu.edu

Leaf Diseases on Ornamental Trees and Shrubs, HYG-3044-96
... leaf spot and leaf blotch diseases. Frogeye Leaf Spot of Crabapple. Pathogen: Botryosphaeria obtusa This leafspot disease is a minor problem on most crabapples, although a few exhibit considerable leaf yellowing and leaf drop in some locations, including 'Madonna' and 'Professor Sprenger.' During moist spring weather the fungus infects leaf tissue and ...
ohioline.osu.edu

Strawberries are an Excellent Fruit for the Home Garden, HYG-1424-98
... 5 Small Good Fair Medium Table 2. Disease Resistance of Recommended Strawberry Cultivars Cultivar Leaf Spot Leaf Scorch Red Stele Verticilium Wilt Powdery Mildew June-Bearers Earliglow R R R R S ... for winter protection should be pulled from plants in early spring, before there is much leaf yellowing. The mulch should be left in the alleyways and can be used to cover blossom ...
ohioline.osu.edu

Black Spot of Roses, HYG-3072-96
... Symptoms Round to irregular black splotches with fringed margins are quite obvious, mostly on upper leaf surfaces. Leaf yellowing develops around these black spots, with defoliation of these infected leaves common. Repeated ... to newly emerged leaves and stem tissue in the spring. Under ideal conditions of leaf wetness, humidity and temperature the spores can germinate and infect in 1 day, cause ...
ohioline.osu.edu

Plant Disease Fact Sheet Index
... Leaf Spot of Grape, HYG-3031-02(pdf) Bitter Rot of Grape HYG-3032-92 (pdf) Cytospora Canker of Spruce, HYG-3033-96 (pdf) Yellowing, Dieback and Death of Narrow-Leafed Evergreens, HYG-3034-96 (pdf) Using Fungicide Sprays Effectively, HYG-3038-96 (pdf) Leaf ... ) Powdery Mildews on Ornamental Plants, HYG-3047-96 (pdf) Anthracnose Leaf Blight of Shade Trees, HYG-3048-96 (pdf) Verticillium ...
ohioline.osu.edu

Ohioline: Yard and Garden: Trees, Shrubs & Groundcovers
... & Use WebGarden Trees, Shrubs & Groundcover - Bulletins Landscape and Garden Plant Evaluations, Bulletin 874-99 Leaf Identification Key to Eighty-Eight Ohio Trees, Bulletin 899-02 Nitrogen Fertilization of Canaan ... HYG-3046-96 (pdf) Verticillium Wilt of Landscape Trees and Shrubs, HYG-3053-96 (pdf) Yellowing, Dieback and Death of Narrow-Leafed Evergreens, HYG-3034-96 (pdf) Anthracnose Fruit Rot ...
ohioline.osu.edu

Cherry Leaf Spot, HYG-3021-95
... than on sweet cherries. The most conspicuous symptom, especially on sour cherries, is the golden yellowing of older infected leaves before they drop off. Although this symptom does not occur every ... Road; Columbus, OH 43210-1044. Table 1. Approximate minimum number of hours of leaf wetness required to produce leaf spot infections caused by conidia on sour cherries. a temp. (Degrees F) Average ...
ohioline.osu.edu

Necrotic Leaf Blotch of Golden Delicious Apples, HYG-3204-98
... Ohio State University Extension Fact Sheet Plant Pathology 2021 Coffey Road, Columbus, Ohio 43210 Necrotic Leaf Blotch of Golden Delicious Apples HYG-3204-98 Michael A. Ellis Department of Plant ... from tree to tree within the same orchard. Symptoms The symptoms are a leaf blotching, followed by a yellowing of the affected leaves (chlorosis) and defoliation. Defoliation can be severe. Irregular brown ...
ohioline.osu.edu

Maintaining Healthy Rhododendrons and Azaleas in the Landscape, HYG-3043-96
... , and Phytophthora root rot. Iron Deficiency Figure 1 shows the yellowing of rhododendron leaves typical of iron deficiency. The yellowing is between the veins and more severe on younger leaves. ... complete, acid fertilizer that contains iron. Figure 1. Yellowing of rhododendron leaves, due to iron deficiency (iron chlorosis). Winter Burn Leaf drying and browning can occur on rhododendron leaves as ...
ohioline.osu.edu

Controlling Rose Diseases HYG-3063-96
... rosae, produces round black spots with fringed margins on leaves or stems. On some varieties, yellowing may show up around the spots. These symptoms are often seen on the lower leaves ... tend to show symptoms before younger leaves. Under favorable conditions rust can cover the entire leaf and stem of the rose plant. Severe infections can cause premature defoliation. Control Whenever possible ...
ohioline.osu.edu