Common diseases and pests of Hongfentaige and their control methods

Common diseases of Hongfentaige: black rot

Black rot of the red-pink trefoil usually occurs in summer. The summer is hot and humid, and even humans don’t like the environment. How can succulents spend the summer happily?

In the summer when ventilation conditions are poor, black spots will first appear on the stems of the red rose and then spread until the leaves turn black and fall off.

Prevention and control methods: Pay attention to ventilation in summer, prevent heavy rain, and provide appropriate sunshade.

Once black spots appear, immediately fill the pots with carbendazim. If black rot is severe due to force majeure factors such as business trips, you can pick off slightly intact leaves and use them for leaf cuttings, and save as many as possible.

Common pests of red roses: scale insects

Basic symptoms of the red-pink cassia scale insect: The scale insect attaches to the surface of the red-pink cassia leaves, and its secretions contaminate the leaves, even causing serious consequences such as leaf withering.

The cause of the occurrence of red-pink scale insects: untimely disinfection and the breeding of insect eggs.

Prevention and control methods: Spray the pesticide in time during the nymph stage. You can use 1000 times diluted 40% oxydemeton-methyl, spray once every 8 days, for 2 to 3 times in a row. Mixing white wine with water can also effectively kill scale insects without damaging the leaves of the red rosewood.