Pests, diseases and control methods

Pests are harmful animals populations in quantities that plants can not host.
Diseases are caused by fungi, bacteria and viruses.
Not all insects are harmful to plants. In fact, there are many beneficial insects.. Some because they help pollinate plants and create the fruit and others because they are predators of harmful insects.
The methods of controlling pests and diseases that we will discuss here are natural or organic. If you are interested in broad-spectrum poisons, this is not the right place.