Help the development of the site, sharing the article with friends!

Avocado is one of the most profitable crops due to how highly valued its fruits are today. However, as with many crops that have been exploited for some time, a whole series of insects and pests have appeared that have learned to take advantage of this tree.

If you want to learn which are the main avocado pests and diseases and how to prevent its appearance, keep reading us in this Green Ecologist article where you will find a guide with practical information and photos.

Avocado pests

Pests are usually insects that attack and damage the plant in various ways, although sometimes they can also be larger animals, such as small rodents. These are the most common avocado pests:


These small, soft-bodied winged insects usually appear in spring. They pierce the surface layer of the leaves and drink their juices from them, causing them to dry up due to the large number of attacks suffered. Due to their small size they can be difficult to identify, although the brownish tint the leaves take on when they should not dry out is an important clue. Sometimes they also attack the fruit, damaging its appearance and making it unsuitable for marketing.


Mealybugs occasionally appear on avocado crops, resulting in a nuisance that sometimes requires action. The black or white scales of this type of insect occur occasionally in older avocado trees, but there have been no serious cases of infections in young trees. The cottony mealybug appears rarely, but is unlikely to cause serious infestations.

Red spider

It is one of the most common pests to find in areas with avocado crops. It is a small arachnid with a reddish color that is positioned on the leaves of the plant, from which it sucks the juices and sap. Because of its attack, the leaves turn brown and may fall. Its size is very small, but when the infestation is serious, it produces cobwebs that are very easy to identify with which it passes from one plant to another or that it uses to move between branches.

Seed weevil

To finish mentioning the main avocado pests, we focus on the seed weevil, which is harmful both as an adult and as a larva. These parasites are very dangerous and can affect up to 80% of a crop's production, which is why producing countries take serious measures to protect themselves from infested seeds. The larva enters the fruit, making its way through the pulp, to then reach the pit, on which it feeds.

Avocado diseases

Like pests, there are also various diseases and fungi that can affect our crops. These are the main diseases of the avocado tree:


It has its origin in the fungus Colletotrichum gloesporoides. It is a disease that appears especially in young shoots, fruits, flowers and branches, causing depressed black spots and wounds that end up rotting. Appears in conditions of excess humidity.


Caused by the fungus Sphaceloma persea, which attacks the stems, leaves and fruits of the avocado tree. The leaves turn a sickly brown color, and lesions are circular, brown and slightly depressed areas on the fruit. Although the damage is only superficial, the appearance of the fruit is damaged and it is no longer suitable for commercialization.

Avocado sadness

This is one of the avocado diseases that affects the roots of the plant, causing the upper branches to dry out and the leaves to lose their green tone and photosynthesis capacity. The fruits become small and the tree may end up dying.

Peduncle ringing

When a fruit is affected, a ring-shaped lesion can be seen above the point of attachment of the fruit to the peduncle. It is a very serious problem, because it can cause a large number of fruits to fall prematurely, causing great losses.

How to prevent avocado pests and diseases in an ecological way

Many of the avocado diseases are caused by fungi that appear when there is excess humidity or poor drainage in the soils, so it is especially important to maintain the loose, well-drained soils and above all, do not overdo the watering.

In the case of pests, thrips can be controlled by adding nicotine solutions to irrigation, or with sulfur and lime solutions. As for the mealybugs, these are easy to control with a whole series of ecological insecticides that can be made at home. Here you can see How to make natural insecticides for plants.

In addition, we recommend that you consult these other gardening guides that deal with certain pests and diseases of plants in particular, these being common in avocado trees.

  • Eliminate the cottony mealybug: treatment and home remedies.
  • Anthracnose: what it is and treatment
  • How to eliminate weevils.

If you want to read more articles similar to Avocado pests and diseases, we recommend that you enter our category of Cultivation and care of plants.

You will help the development of the site, sharing the page with your friends
This page in other languages: