What to do if the leaves of the poinsettia turn black
The editor brings you the knowledge of how to deal with the black leaves of poinsettia and the solutions to the problem of black leaves, followed by a detailed sharing.
The highlight of the poinsettia is its blooming during Christmas and the Spring Festival, presenting a world of fiery red in the cold winter, bringing warmth and vitality to people. Many families grow it, but they also face some problems, such as yellowing leaves, root rot, and black leaves. Here, I will discuss what to do if the leaves of the poinsettia turn black? Interested friends, let's look at the solutions to black leaves of poinsettia.
【Solutions to Black Leaves of Poinsettia】
<1, Black spot disease causing black leaves>
When the poinsettia has black spot disease, black spots will appear on the bracts, and the disease will gradually expand, leading to black leaves. If you find black spot disease in poinsettia, you should take timely rescue measures.
Black spot disease is mainly transmitted by pathogens through wind and rain, and the plant becomes infected. Poor ventilation, improper lighting, and improper watering and fertilizing can easily cause this disease. Therefore, it is necessary to strengthen maintenance management for the prevention and treatment of black spot disease, promptly clear away diseased branches, reshape, ventilate, and illuminate, and conduct timely drug spraying for treatment.
<2, Grey mold disease causing black leaves>
Grey mold disease occurs during the flowering season of poinsettia, especially when it is continuously rainy, humid, and dark. Lesions with a water-soaked appearance appear on the inflorescences, followed by a layer of pathogen sporangia covering the lesions, and the pathogen continues to spread to the bracts until it spreads to the branches, causing brown to black lesions.
What to do if the leaves of poinsettia turn black
When grey mold disease is found, increase indoor temperature, ventilate, and reduce humidity. Place it in a sunny environment and remove and burn the lower leaves. In the early stages of the disease, you can spray 1% Bordeaux mixture, or 65% Zineb 800 times solution, or spray a 0.3-0.5 degree lime sulfur mixture.
<3, Black leaves after the viewing period>
After the flowering period of the poinsettia, the viewing period is also over, and this is when black leaves appear, which is normal. We can prune it, first cutting off the upper branches, leaving only a 5 cm base stem segment and 3-5 buds to allow it to regenerate.
In addition, it is necessary to strengthen water and fertilizer management and place it in a sunny location with appropriate temperature. Then, prune again in the autumn to maintain a good plant shape. In the autumn, maintain appropriate temperature and lighting, and soon you will see the red bracts of the poinsettia again.
The above content about what to do if the leaves of poinsettia turn black and the solutions to black leaves of poinsettia introduced by Green Enthusiast Network [www.lvzhimi.com] are hoping to be helpful to you!