Black rot control of Cymbidium

Black rot control of Cymbidium

Symptoms of black rot in Cymbidium

In the early stages of black rot infection, small brown wet spots with yellow edges will appear on the underside of the leaves, and then gradually spread out. The middle part of the old lesions is dark brown or black, and water will seep out when squeezed, while the old lesions will become dry and black. The leaves of infected orchids turn yellow and gradually fall off, with the parts near the base of the leaves becoming noticeably discolored, and the pseudobulbs turn black after being infected.

Methods for controlling black rot of Cymbidium

Once discovered, the infected parts and organs should be removed promptly and burned or buried deeply. You can spray with 0.1 % to 0.2 % copper sulfate solution or 400-500 times diluted 50 % fungicide wettable powder.

During the maintenance period, spray frequently with 100-150 times diluted 50 % Thiram, or 500 times diluted Zinkelin or sprinkle directly on the diseased part. You can also spray 500 times diluted 80 % Dasheng M-45 wettable powder to prevent this disease.

In addition, keeping the orchid shed ventilated and avoiding moisture can inhibit the spread of this disease.

<<:  Disease prevention and control methods of Paphiopedilum

>>:  Common diseases and pests of lilies

Recommend

Common varieties of Chinese evergreen

Stemless Peperomia This is what we often call wat...

Tradescantia pictures

Tradescantia short profile Introduction to Trades...

How to care for the dormant period of the thorny tree

Light treatment of the dormant period of the thor...

Chive planting method and time easy germination cultivation technology

Suitable time for planting chives The planting ti...

What fertilizer is good for yew

1. What kind of fertilizer is good? Generally, co...

How to water pepper tree

1. Control of watering amount Pepperwood requires...

How to plant the cut green radish

1. Hydroponic method First, prepare a container a...

When is the best time to plant spinach?

Spinach is a highly adaptable vegetable that can ...

What month is suitable for planting broom seedlings?

When to plant broom seedlings Broom seedlings hav...

Cultivation methods and precautions of pine red plum

Farming methods soil The soil requirements of pin...

How to sow Lithops

1. Sowing time If you want to propagate Lithops b...

What kind of clock flowers are there and why are they called clock flowers?

1. What are they? There are many types of clock f...