Common diseases of Jianlan and their prevention and treatment methods

Common diseases of Jianlan and their prevention and treatment methods

Anthracnose of Jianlan

Anthracnose occurs throughout the year, especially in hot and rainy seasons. When the disease occurs, the leaves turn yellow and black, and in severe cases the plant dies.

Solution: Spray the pesticide in time when the disease occurs, and do not ignore the small scar on the leaves. The pesticide that can be used is methyl thiophanate solution, which should be sprayed once every 7 to 10 days. In addition, spray Bordeaux mixture once a month.

Jianlan root rot

Root rot can also be said to be root nematode disease. Nematodes live in the soil and eat the rhizomes, causing the roots to rot. The leaves on the ground grow poorly, turn yellow, and even cause the plants to wilt. Nematodes can cause a large number of wounds on the roots. If not properly maintained in a humid environment, pathogens can easily invade and accelerate the disease of the plant.

Solution: Before planting Jianlan, disinfection should be done, ventilation should be carried out in time, and the roots should be irrigated with Bordeaux liquid once a month to kill insect eggs. For plants that are seriously infected, remove them from the pots in time, cut off the rotten parts, replace them with new soil and pots, and replant them after disinfection.

Sclerotium rot

White rot often occurs during the rainy season, mainly harming the rhizomes of Jianlan, causing them to rot and die. White colonies will appear on the soil surface, the plant will slowly fall over, and the entire plant will wither.

Solution: Choose suitable potting soil, pay attention to ventilation and light transmission during maintenance, and control watering. After the disease occurs, remove the diseased soil, sprinkle lime powder with pentachloronitrobenzene powder, clean the diseased plants, and disinfect them. The slightly diseased plants will slowly recover.

Jianlan scale insect

Scale insects are the main pests that harm Jianlan. It will be more serious in an environment with high temperature, high humidity and poor air circulation. Scale insects mainly harm the branches of Jianlan, causing the leaves to turn yellow and the branches to wither.

Solution: Spray the pesticide in time and use 1000 times diluted omethoate. Or rinse with clean water or soapy water, repeat 2 to 3 times to clean it.

<<:  Common diseases of Cosmos and their prevention and control methods

>>:  Common diseases and pests of Broken Bowl Flower and their control methods

Recommend

What fertilizer is best for jujube trees?

Date tree fertilization time It is generally bett...

Dwarf sunflower planting time and method

Dwarf sunflower planting time Dwarf sunflowers pr...

How to make Mirabilis jalapa bloom more

1. Appropriate lighting It is a light-loving plan...

How to Propagate Brazilian Iris

How to Propagate Brazilian Iris Division and sowi...

Is Michelia poisonous?

1. Is it toxic? The answer is very clear, it is n...

How to Plant Avocado Seeds

Avocado Seed Introduction Generally, the seeds of...

How to Plant Mangosteen Seeds

Mangosteen Seed Introduction Generally, the seeds...

How to care for freesia after it blooms

1. Pruning and maintenance After the freesia has ...

Narcissus Flower Language

Flower Language There are many varieties of daffo...

When is the right time to sow chives?

Leek sowing time Leek is a perennial herb belongi...

Is the fork column flower easy to grow? Planting methods and precautions

Is it easy to grow the fork column flower? The fo...

The difference between the measuring ruler and the celestial wheel column

1. Difference in appearance The genus Hylocereus ...