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Glycine max
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- How to Sow Edamame: Soil Temperature, Depth and Protecting the Seed
- Soil for Edamame: pH, Drainage and Why Not to Feed It Nitrogen
- Caring for Edamame: Watering, Earthing Up and Keeping Plants Standing
- Edamame Problems: Birds, Stink Bugs, Caterpillars and Empty Pods
- Edamame Growing Calendar: Warm Soil to a One Week Harvest
- When to Harvest Edamame: The One Week Window and How to Store It
Common problems
Start from what you can see on the plant.
Pests and diseases (66)
Problems recorded for this plant, most serious first.
Stink Bugs
MajorPest
Small feeding punctures on fruit become sunken or turn spongy and discolored. On legumes the pods fail to fill, and fruit drop and deformity increase.
Seedcorn Maggot
MajorPest
Emergence is uneven, and digging up seed reveals white maggots inside the seed or hypocotyl. In transplants the stem base rots and the plant wilts.
Tobacco Cutworm
MajorPest
Many larvae gather on the leaf underside and graze the tissue away, leaving white skeletonized patches. Once they disperse they cause heavy damage to leaves, pods and fruit.
Rust
CommonDisease
Small raised orange-yellow to red-brown pustules form on both leaf surfaces, then rupture and release powdery spores. Heavy infection yellows the leaves and kills them early.
Southern Blight
CommonDisease
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.
Leaf Spot
CommonDisease
Small round brown to gray-white lesions appear on the lower leaves, the centers turning gray with tiny black specks. As they multiply the leaf yellows and drops early.
Excess Nitrogen
OccasionalDisorder
Leaves are large and dark green and stems grow thick but soft. Flowering and fruit set decline while aphids and disease become more frequent.
Fusarium Yellows
Disease
Yellowing starts on the lower leaves, the petioles twist and the plant leans to one side. Vascular tissue browns, growth stops, and heading vegetables may die without ever forming a head.
Fusarium Wilt
Disease
Lower leaves wilt during the day and recover morning and evening, and this cycle repeats as the plant dies back. Cutting the stem reveals characteristic browning of the vascular tissue.
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.
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.
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.
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.
Damping-off
Disease
The stem pinches in at soil level, turning water-soaked to brown and thin, and the seedling topples over. Infection before emergence makes the stand uneven with missing plants.
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.
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.
Bacterial Spot
Disease
Small water-soaked spots appear on the leaves, later turning brown with yellowing around them. Fruit develops water-soaked or scabby spots from which rot spreads.
Downy Mildew
Disease
Pale yellow to yellow-brown angular lesions form on the upper leaf surface with a gray-purple mold in the matching spot underneath. Lesions merge, the leaves die back and the plant declines early.
Ring Rot
Disease
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.
