Main diseases of freesia and their prevention and treatment methods

Main diseases of freesia and their prevention and treatment methods

Mosaic

symptom

Brown spots appear on the leaves, alternating between brown and green. In severe cases, the plants become short, shrink and turn yellow, and the bulbs degenerate, affecting flowering.

Prevention and treatment methods

Once diseased plants are found, remove them immediately to avoid attracting insects to suck the sap and spread through friction.

If conditions permit, choosing non-toxic seedlings for propagation during planting can reduce bulb degeneration to a certain extent.

Pay attention to the prevention and control of aphids. Mosaic disease and aphids are often transmitted together. When aphids are found, spray them with omethoate in time.

Sclerotinia

symptom

When freesia is infected with sclerotinia, the leaves will turn light yellow, the plant growth will slow down, and the leaves will gradually fall off. The inside of the bulb changes color and gradually rots. White sclerotia will grow between the scales. The sclerotium is white at first and gradually turns into brown-black.

Prevention and treatment methods

Check the health of the bulbs promptly and remove and destroy any diseases found.

Contaminated soil should be heated and disinfected in time. If the condition is serious, it can be directly thrown away and replaced with new soil.

When planting, sprinkle pentachloronitrobenzene powder around the bulbs and then cover them with soil, which can reduce the occurrence of sclerotinia disease to a certain extent.

When the disease occurs, spray 800 times diluted 50% thiocarb wettable powder for killing.

Root rot

symptom

The plant is mainly infected during the growing season, and the leaves begin to wither and die. When storing bulbs, they tend to rot and become dry and hard.

Prevention and treatment methods

Once the plant is infected, in mild cases, spray 500 times the concentration of Zineb solution. If the rot is severe and the bulbs have seriously degraded, throw them away directly.

<<:  Dendrobium pest control methods

>>:  Sunflower Sclerotinia Control Methods

Recommend

What fertilizer is good for pepper? How to apply fertilizer and manage it

The role of pepper base fertilizer Applying base ...

When is the best time to sow chive seeds?

Leek seed sowing time Chives are usually sown aro...

Diseases and pests of ground lotus and their control techniques

Common diseases and pests of ground lotus Red spi...

How to water azalea

Don't water until it's dry As the saying ...

Can Phoebe nanmu be planted in the yard?

Can I grow golden nanmu in the yard? Phoebe nanmu...

How to prune grapevines after flowering

Pruning grapevines after flowering 1. Pinching: T...

How to save a dead kumquat tree

1. Spraying Reason: When the kumquat tree dries u...

Can Phoenix Bamboo be watered with beer?

1. Can be poured Phoenix bamboo can be watered wi...

How to prune the lucky tree (illustration of pruning methods)

1. Topping This pruning method is also called pin...

How to plant Portulaca grandiflora

Portulaca grandiflora , also known as foreign pur...

The Flower Language and Cultural Symbolism of the Money Tree

Money tree flower language The flower language of...

Disease and Pest Control of Bitter Water Rose

Rose rust When the weather is hot, you can always...

How to plant pepper seeds and germinate them fastest

1. Seed treatment The seed coat of Sichuan pepper...

How to make asparagus fern bonsai

How to collect materials Choose an irregular 56cm...

Can carnations be propagated by cuttings?

Carnations , known as the "flower of mother&...