Pest is a term used to describe any plant, animal, or pathogenic agent that causes harm to plants or plant products.

Pests and diseases can severely damage your coffee crop, leading to financial difficulties or even complete devastation. To effectively manage these issues, it is important to identify the most significant threats and understand how to deal with them.

Let’s explore common coffee pests and gain a better understanding of their nature and how to address them.

Factors that Attract Pests

Just like any crop, coffee is susceptible to pests, but certain factors can make a coffee crop more vulnerable to infestations. Here are some factors that influence the incidence of pest attacks:

Environmental conditions

Pests vary depending on the environmental conditions of each region where coffee is produced. For instance, the coffee borer beetle thrives in humid environments. Lower altitude areas, which are warmer and more humid, put Arabica coffee at a higher risk of infestation by the coffee berry borer. Even during dry seasons, these insects can hide within the cherries until the arrival of the first rains, causing widespread devastation.

Crop management

Proper agricultural practices play a crucial role in pest control. Farmers need productive and resilient plants to stay competitive. Poor crop management can have a serious impact on yield and profitability.


Farmers who struggle to generate sufficient income for farm investments are more likely to suffer from pest-related issues. If a farmer cannot afford pesticides, they may experience higher pest damage and lower yields. This, in turn, limits their resources to invest in the next crop, perpetuating the cycle.

Common Coffee Pests

Insects can weaken coffee beans, reduce density, and expose coffee plants to secondary infections by fungi and other microorganisms. They also significantly affect the flavor and aroma quality of coffee.

Here are some common coffee pests:

1. Coffee berry borer

These tiny beetles are found in most coffee-producing areas, burrowing inside coffee cherries. Infested berries may fall prematurely, and if the damage is severe, it can result in a bitter, tarry, or fermented taste in the cup.

2. Coffee leaf miner

This pest affects coffee leaves, causing up to 90% necrosis of the leaf structure in severe cases. Defoliation impairs the plant’s ability to photosynthesize. If immature or dead beans make their way into the final brew, they can create bitterness and astringency.

3. Mealybugs

Mealybugs attack various parts of the coffee plant, feeding on sap and secreting a sticky substance that attracts ants. This substance also promotes the growth of black mold, covering leaves and reducing photosynthesis. In the cup, it can result in astringency, a metallic taste, or bitterness.

4. Nematodes

These microscopic worm-like parasites form knots in the roots, hindering the plant’s ability to absorb water and nutrients properly. Infestations can lead to reduced root growth, defoliation, and overall poor plant health.

Other pests include thrips, green scales, coffee stem borers, leaf skeletonizers, fried egg scales, and Atensia bugs.

Best Insect Pest Management in Coffee

Greenlife Crop Protection Africa Limited offers Kenyan farmers effective solutions for controlling coffee insect pests by providing a range of products with broad-spectrum effectiveness.

1. Ranger (chlorpyrifos 480): This insecticide is recommended for mealybugs, green scales, borers, leaf miners, leaf skeletonizers, and Atensia bugs. The recommended application rate is 30-40mls per 20 liters of water.

2. Presento (acetamiprid): This insecticide is effective against sucking pests like thrips and green scales. The recommended application rate is 4-10g per 20 liters of water.

3. Kingcode Elite: This insecticide is both systemic and contact and is suitable for a wide range of pests. The recommended application rate is 10mls per 20 liters of water.

To ensure effective control of coffee insect pests, it is crucial for farmers to incorporate the recommended insecticides with Integra at a rate of 3mls per 20 liters of water. It is also advisable to repeat the spray within a 10-14 day interval.

These products are readily available at stockists and wholesalers across the country.

Note: Farmers should carefully follow the instructions provided for each insecticide and ensure proper application for effective pest control in coffee crops.

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