Most of the diseases affecting plants are caused by fungi, for which fungicides are used that can kill them.
When bacteria and other viruses are involved, it is more difficult to combat them, and the most effective measure is prevention.
Pests are more common in outdoor plants, although indoor plants are not completely safe either.
The arrival of good weather and high temperatures is often accompanied by pests and diseases, which with certain care can be prevented.
It is advisable to observe the plant to check that it has not been infested by fungi. It is necessary to prune and eliminate those leaves that are weakest, since they will be the most defenseless against attacks.
Care must also be taken with watering. It is necessary to provide the plant with adequate water. If you don’t water it, it can dry out and become weak, but it can also be counterproductive to water it abundantly and make it waterlogged.
Try to keep the soil clean by providing the necessary fertilizer and removing any debris where parasites can settle.
What are the most common plant diseases?
Botrytis: this is a disease caused by the fungus Botrytis, which produces a greyish mould on the leaves and flowers. It usually appears when there is excessive humidity, so it is advisable to watch the plants outside if it has rained heavily.
Aphids, whitefly and scale insects: other common plant diseases are invaded by sap-sucking parasites. In the case of the white fly, they also secrete a sweet substance that attracts other parasites such as fumagine or bold.
Virosis and Bacteriosis: fungi, bacteria and viruses can infest the plant leaving spots on the leaves that can sometimes produce a bad smell.
Rotten Roots: sometimes an excess of watering can cause the roots to rot, especially in those plants that require little water to survive. However, there are also fungi that affect precisely the roots and that is why it is more difficult to detect at first sight. The most frequent symptoms are the change in colour of the leaves, which become more yellowish and wither quickly. If the roots of a plant have rotted, it is very difficult to save it and the soil in which it has been planted is also unusable, because fungi can continue to live in it, which could make a plant sick again if it is reused.
Whether you plant your own seeds or buy the plant from a specialist centre, it is essential to carefully observe the leaves to ensure that they do not have any unwanted visitors.
Professional nurseries and shops take great care of the plants to offer them to the consumer in a healthy way. Professionals can advise you on what preventive measures you can take to keep your plants away from possible diseases, as well as how to act if they have contracted any. An appropriate treatment, carried out in time, will make your plant overcome the disease and survive.