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Pyrus pyrifolia
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- How to Plant a Pear Tree: Rootstock, Site and Spacing
- Pruning a Pear Tree: Winter Framework and Summer Control
- Pear Pollination: Groups, Partners and Frost at Blossom
- Pear Tree Year: What to Do in Each Season
- Pear Problems: Rust, Midge, Psylla and Other Pests
- When to Pick Pears: Ripening Off the Tree, Not On It
Common problems
Start from what you can see on the plant.
Pests and diseases (74)
Problems recorded for this plant, most serious first.
Pear Rust
MajorDisease
Round orange-red lesions form on the upper leaf surface with small black specks in the center. The underside of the lesion swells into hair-like tubes, and heavy infection causes leaf drop and loss of vigor.
Black Spot
MajorDisease
On roses, dark brown lesions with radiating edges form on the leaves, which yellow around them and drop. On pear, sooty black lesions appear on leaves, fruit and the calyx of young fruit, deforming the fruit.
Ring Rot
MajorDisease
The bark of branches and trunk becomes rough and warty, serving as the inoculum source. Fruit develops round brown lesions that soften and rot in concentric rings.
Violet Root Rot
CommonDisease
The tree gradually loses vigor and the leaves shrink, sometimes wilting abruptly in summer. A purple-brown or white mycelial mat covers the root surface and the bark peels away easily.
Powdery Mildew
Disease
White patches appear scattered on the upper leaf surface at first, then the whole leaf is coated in a white powder. Leaves later yellow, brown and die back, and reduced photosynthesis cuts growth and yield.
Late Blight
Disease
Dark green water-soaked lesions appear on the leaves and expand quickly into brown dead tissue. White mold forms on the underside and at the lesion edge, and dark brown lesions spread to stems and fruit.
Bacterial Canker
Disease
Leaf margins scorch and die back, and splitting the stem reveals browned vascular tissue. Scabby, bird's-eye lesions form on fruit and shoots.
Brown Leaf Spot
Disease
Small light brown to gray-brown spots form on the leaves and enlarge into irregular lesions. When they merge the whole leaf dies and plant vigor drops sharply.
Sclerotinia Rot
Disease
The crown, stem or head rots in a water-soaked way and is covered in white cottony mycelium. Black sclerotia later form inside and on the surface, and the plant wilts and dies.
Black Rot
Disease
V-shaped yellowing spreads inward from the leaf margins and the veins darken into a black network. As it advances the whole plant wilts and dies.
Citrus Melanose
Disease
Tiny dark brown specks are scattered over fruit and leaves, sometimes clustering into tear-streaks or a sandpaper texture. Heavy infection makes the rind rough and badly cuts appearance value.
Crown Gall
Disease
Irregular galls form at the crown and on the roots, gradually enlarging and turning woody. They block the flow of water and nutrients, so the plant loses vigor and may die.
Peach Leaf Curl
Disease
New leaves thicken and pucker into waves and turn red to pale pink. They later bloom with a white powder, brown, and drop, weakening the tree.
Southern Blight
Disease
The stem rots at soil level and white silky mycelium spreads over the crown and the surrounding soil surface. Brown sclerotia the size of rapeseed then form and the plant wilts and dies rapidly.
Anthracnose
Disease
Light brown to dark brown round lesions with sharp margins form on leaves and fruit, slightly sunken in the center. In wet weather salmon-pink slimy spore masses ooze out on the lesions.
Root-lesion Nematode
Pest
Elongated blackish brown necrotic lesions form on the root surface and fine roots rot away. Above ground the stand is uneven and plants stay small with pale foliage.
Root-knot Nematode
Pest
The plant wilts in the daytime and does not recover with feeding or watering. Pull it up and the roots carry beaded chains of galls of varying size with few fine roots.
Gray Mold
Disease
Water-soaked brown lesions form on flowers, fruit and leaves, densely covered by a fuzzy gray mold. Fruit rots and drops, and decay continues in storage after harvest.
Brown Rot
Disease
Blossoms brown and die, and round brown lesions on fruit expand rapidly. Grayish white powdery mold forms in concentric rings on the lesion and the fruit finally dries into a hard mummy.
