Flower Watering Techniques for Different Seasons and Pest and Disease Control Methods

General Methods for Preventing and Controlling Flower Pests and Diseases

General Methods for Preventing and Controlling Flower Pests and Diseases:

1. Keep the cultivation area clean and hygienic to reduce damage.

2. Protect the plants; do not let them split or become damaged, and guard against pathogen invasion.

3. Sterilize the growing medium in advance to kill pathogens and pests.

4. Strengthen routine management: keep water and fertilizer appropriate, air circulating, temperature suitable and light moderate, so the plants grow vigorously and the breeding and spread of pests and diseases are controlled.

5. For flowers overwintered outdoors, spray or paint lime sulfur mixture after leaf fall, and spray 1-3 times with Bordeaux mixture in early spring and before the flower buds sprout, to prevent pests and diseases.

Damping-off

Sown seedlings

Near the soil surface, a scorch-like appearance first appears, after which the seedlings soften, fall over and die.

Sprinkling plant ash on the surface of the potting soil or watering with amobam solution can sterilize the soil and protect the seedlings.

Rust

Carnations and flowers of the Rosaceae family

In the early stage, orange-red or yellow spots appear on the leaf surface; later the undersides of the leaves are covered with yellow powder, and the leaves scorch and wither.

Anthracnose

Ornamental fruit flowers

Before the fruit ripens or withers, brown spots appear on the fruit skin and gradually enlarge; after the fruit ripens or withers, it hardens.

After the flowers fade, spray 1-3 times with lime sulfur mixture or carbendazim.

Powdery mildew

Flowers of the Rosaceae and Asteraceae families

White powder appears on both sides of the leaves.

Reduce humidity; spray amobam or carbendazim solution, or spray Bordeaux mixture to prevent it.

Downy mildew

Herbaceous flowers

In the early stage, white spots with indistinct outlines appear on the leaf surface; later they are covered with fine white hairs.

Spray 1-3 times with Bordeaux mixture to prevent it.

Soft rot

Herbaceous flowers

Water-soaked spots appear on the leaf surface, petioles and flower stems, after which they wilt and droop.

Spray Bordeaux mixture.

Sooty mold

Perennial evergreen flowers

Dark brown sooty smudges appear on the leaf surface, then gradually expand to form a black soot-like mold layer.

Spray Bordeaux mixture, or use 5% alcohol to wipe off the sooty smudges.

Brown spot disease

Orchid family flowers

Brown sunken spots appear on the leaf surface, and the leaves dry and scorch.

Pay attention to shading and raise the air humidity; use an equal-amount Bordeaux mixture.

Black rust

Asteraceae flowers

In the early stage, yellow-green spots appear along the surface; after rupturing they release yellow powder, and finally turn into black patches.

Improve drainage, provide full sunlight, improve ventilation, and spray Bordeaux mixture.