Gadenin日本語Get the app
Raphanus sativus var. longipinnatus
Growing calendar
Typical timing for central Japan (Kanto region). Shift it for your own climate, and record your actual dates.
Guides
- Daikon Soil Preparation: Preventing Forked and Stunted Roots
- How to Sow Daikon Radish Seed Directly in the Ground
- Caring for Daikon Radish: Watering, Feeding and Earthing Up
- Daikon Radish Growing Calendar: Sowing to Winter Harvest
- Daikon Radish Problems: Pests, Rot and Forked or Split Roots
- When to Harvest Daikon Radish and How to Store It
Common problems
Start from what you can see on the plant.
Pests and diseases (40)
Problems recorded for this plant, most serious first.
White Rust
MajorDisease
Creamy white slightly raised irregular pustules form on the leaf underside and burst through the skin releasing white powder. The upper surface turns pale yellow and heavy infection ruins appearance and market value.
Root-lesion Nematode
MajorPest
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.
Cabbage White Caterpillar
CommonPest
Irregular holes appear in the leaves and eventually only the veins remain. Dark green pellets of frass are conspicuous at the crown and on leaf undersides.
Diamondback Moth
CommonPest
Larvae graze the leaf tissue from below, leaving the upper skin as white window-like patches. As they grow they chew many small holes and also attack the growing point.
Bolting
CommonDisorder
A flower stalk rises from the center of the plant and the leaves turn tough and stringy, spoiling eating quality. Heading vegetables run to seed without ever forming a head.
Damping-off
CommonDisease
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.
Bacterial Soft Rot
CommonDisease
The crown or the head becomes water-soaked and soft, then collapses into a slimy mush. The rotting tissue gives off a distinctive foul odor.
Cutworms
CommonPest
Typically a newly transplanted seedling is severed at soil level and found toppled the next morning. Scratch the soil beside the cut seedling and a gray-brown caterpillar turns up.
Sawflies
CommonPest
Feeding advances rapidly from the leaf margin, leaving only the veins within a short time. The larvae rear up when disturbed and are often lined up on the leaf underside.
Puffy Fruit
OccasionalDisorder
The fruit looks normal outside but is hollow inside when cut, feeling light and angular in the hand. Flavor is thin and shelf life is poor.
Seedcorn Maggot
OccasionalPest
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.
Clubroot
OccasionalDisease
Leaves wilt during the day and recover morning and evening, and growth is markedly poor. Pull the plant and the roots carry many spindle-shaped or irregular galls.
Fruit Cracking
OccasionalDisorder
Radial or concentric cracks open around the shoulder and calyx of the fruit. Rot organisms enter through the cracks and the fruit spoils quickly.
Bacterial Wilt
Disease
Leaves wilt while still green during the day and recover in the morning and evening; after a few days of this the plant dies. Cut the stem and stand it in water and a milky white bacterial ooze streams out in threads.
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.
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.
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.
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-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.
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.
