Anemone. Root-Decay (Sclerotinia Tuberosa)

Rhizomes decayed and large lumps form on the outside.

Control

Eradicate affected rhizomes and the cup-like fungous bodies near such plants.

Rust

Several rusts attack species of Anemone.

Anthurium. Blight (Glomerella Cincla)

See under Orchids.

Apple. Blight

The same disease as Pear Blight, which see.

Canker

Smooth cankers in bark of trunk or limbs usually indicate blight (Bacillus amylivorus); rough ones, New York apple-tree canker (Sphaeropsis malorum), or the nail-head canker (Numularia discreta).

Control

As soon as noticed, cut away dead bark and wood to the living tissue and paint over with lead paint or coal-tar. Scab (Venturia inaequalis). - Olive-green, brownish or blackish scab-like spots on leaves and fruit.

Control

Rake and burn or plow under old leaves very early in spring. Spray with lime-sulfur 32° Baume, 1-40, or bordeaux, 3-3-50: (1) when blossom buds show pink; (2) when majority of petals have fallen: (3) three weeks after 2, depending upon the weather; (4) if a late attack is feared, spray before fall rains begin.

Apricot. Yellows

See under Peach.

Black-Spot Or Scab

See under Peach.

Aquilegia. Mildew (Erysiphe Polygoni)

See under Verbena. Disease very similar.

Black-Spot (Bacillus Delphini)

Sunken black spots on leaves and stems.

Control

Remove and burn diseased parts. Artemisia.

Rust (Puccinia Asteris). - Same Rust As On Asters, Which See. Artichoke. Soft-Rot

See under Carrot.

Arum. Leaf-Spot (Protomyces Ari)

Irregular bleached patches on leaves and leaf-stalks of A. maculatum.

Control

Burn diseased plants.

Asparagus. Rust (Puccinia Asparagi)

A rust of the tops which is often so severe as to kill them, thus interfering with root-development.

Control

Dust with flowers of sulfur about every three weeks while dew is still on in the morning. Use dusting-machines. Aspidistra.

Leaf-Blotch (Ascochyta Aspidistras)

Large, irregular, bleached spots with black streaks running across.

Control

Remove diseased leaves.

Aster. Rust (Puccinia Asteris)

Brown rust of leaves.

Control

Eradicate the affected leaves.

Aucuba. Freezing

Young leaves suffer from spring frosts.

Auricula. Leaf-Blotch (Heterosporium Auriculi)

Three or four olive-green spots on each leaf. Spots become brown and fall out.

Control

Do not have excessive moisture. Spray with potassium sulfid and ventilate well. Avocado, or Persea. Anthracnose (Colletotrichum glaeosporioides).

See under Pomelo.

Catalogue of Diseases, continued.

Bamboo. Smut ( Ustilago Shiriana)

Internodes and tips of young shoots attacked. Wild and cultivated bamboo attacked in Japan.

Control

Bordeaux mixture and sprinkling soil with lime before the shoots appear. Banana.

Rot (Bacillus Musae)

Leaf-blades droop, turn yellow; petioles decay, letting leaves drop, and finally whole plant rots to the ground.

Control

Practise sanitation.

Bean. Anthracnose, Or Pod-Spot (Colletotrichumlindemuthianum)

Reddish brown, scab-like spots on stems, pods, and veins of leaves, particularly on yellow-podded snap beans. Fungus enters the beans.

Control

Use seed only from pods without spots. Spray plants, from beneath and above, every ten days.

Blight (Bacterium Phaseoli)

Large papery spots on leaves and watery spots on pods.

Control

As for Anthracnose.

Beet. Heart-Rot (Phoma Betae)

Leaves appear spotted late in July, then wilt, and finally a dry heart-rot appears.

Control

Destroy affected plants. Practise long rotations. Treat seed with formalin, one pint in thirty gallons of water.

Scab

The same disease as Potato Scab, which see. Begonia.

Root-Rot (Thielavia Basicola)

See under Nicotiana. Berberis.

Rust (Puccinia Graminis)

Orange-colored rust spots on under side of leaf.

Betula. Leaf-Spot (Glaeosporium Betularum)

Round spots with blackish margin.

Heart-Rot (Fomes Igniarius)

See under Fagus.

Blackberry. Crown-Gall, Or Root-Gall (Bacterium Tumefaciens)

Swellings, hard or soft, on roots and stem below ground.

Treatment

Plow up and burn all bushes in a diseased patch. Plant clean roots in a new place.

Anthracnose

See under Raspberry.

Red Or Orange Rust

See under Raspberry.

Leaf-Spot

See under Dewberry. Same disease. Blueberry.

Rust (Calyptospora Goeppertiana)

Stem attacked, swollen, spongy, at first pink, changing to brown and blackish. Plants taller than healthy and leaves dwarfed.

Control

Segregate from species of fir and spruce.

Brassica. See under Cabbage.

Brussels Sprouts. Club-Root

See under Cabbage. Buxus.

Stem-Blight (Nectria Rousseliana)

Twigs killed, reddish pustules appearing on stems and leaves.

Control

Remove all diseased parts and burn.

Cabbage Club-Root, Or Club-Foot

(Plasmodiophora brassicae) - A contorted swelling of roots and sickly wilted tops.

Control

Destroy affected seedlings. Lime the soil at least eighteen months before planting cabbage, using at the rate of two tons of quicklime to the acre.

Black-Rot (Bacillus Campestre)

Sap-tubes in leaves and stem turn black and the leaves drop, thus preventing heading.

Control

Practise crop-rotation. Soak the seed for fifteen minutes in a solution of mercuric chloride, one tablet in a pint of water. Cactus.

Spot (Diplodia Opuntiae)

Sometimes a serious disease.