Prevention and control of common diseases of Amaryllis

Prevention and control of common diseases of Amaryllis

Spot disease

Spot disease mainly harms leaves, flowers, stalks and bulbs (basically the important parts of the plant), and circular spots appear at the affected areas when the disease occurs. Autumn is the peak season for this disease.

Prevention

To prevent problems before they occur, soak the bulbs in formalin solution before planting and spray them with Bordeaux liquid regularly in spring. When lesions are found, remove the diseased leaves in time and spray carbendazim to kill bacteria.

Viral diseases

Plant infection with unnecessary viruses can cause root and leaf rot. In the early stage of the disease, the stems and leaves turn yellow and rot, gradually spreading to the bulbs, and eventually the whole plant dies.

Prevention

When the disease occurs, remove the bulbs, remove the diseased leaves and stems, cut off the rotten part of the bulbs, and soak them in 43°C water for 3 to 4 hours to easily prevent and control the disease.

Nematode disease

This kind of insect is very stubborn and mainly invades the plant through leaves and flower stems. In severe cases, the whole plant is covered with small white insects.

Prevention

In the early stage of the disease, a small number of nematodes will appear on the leaves. If discovered in time, they can be scraped off directly and sprayed with carbendazim. When there are many insects, remove the plant from the pot, cut off all the stems and leaves, and soak it in 43℃ warm water for 3-4 hours.

Fusarium wilt

At the early stage of the disease, the leaf tips turn yellow, gradually spreading downward and inward, and eventually the entire plant turns yellow. The corms produce dark red or brown rotten masses accompanied by a small amount of hyphae.

Prevention

Maintain carefully, water scientifically, and avoid water accumulation in the pot.

Loosen the soil frequently to enhance the air permeability of the roots, and be careful not to damage the roots to reduce wounds.

When the disease occurs, remove the root cause in time. For diseased leaves, soak them in carbendazim or root rot to disinfect them, then dry them and replant them.