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Pests Affecting Wheat Farming In Kenya

Pests Affecting Wheat Farming In Kenya

Wheat is a crucial crop in Kenya, and it plays a significant role in food security. However, wheat farming in Kenya is faced with various challenges, including pests that can cause significant losses to farmers. Pests such as aphids, Hessian fly, and armyworms are among the most common pests that affect wheat farming in Kenya.

These pests can cause significant damage to wheat crops, leading to reduced yields and lower quality grains. Additionally, some pests can also transmit diseases that can further reduce yields and quality. Therefore, pest management is crucial for wheat farmers in Kenya to ensure that they can produce high-quality wheat and maximize their yields.

In this article, we will discuss some of the most common pests affecting wheat farming in Kenya, their characteristics, and how to manage them effectively. We will also highlight some of the best practices that farmers can adopt to prevent pest infestations and maintain healthy wheat crops.

Overview of Wheat Production in Kenya

Wheat (Triticum aestivum L) is the second most important cereal crop in Kenya after maize, and it is produced mainly under rainfed conditions on 0.4% of the arable land. The crop has greater potential in the country where it is grown in Agro-ecological zones: UH2-UH3; LH2-LH3. The annual estimated area under production is 150,000 hectares with a production of 320,000MT in 2023.

Wheat farming in Kenya is mostly done by small-scale farmers, but there are also large-scale commercial farmers. The crop is grown in the highlands of Kenya, with the main producing areas being Nakuru, Narok, Uasin Gishu, and Trans Nzoia counties. Wheat farming in Kenya is done in two seasons, the long rains (March to June) and the short rains (October to December).

The government of Kenya has been promoting wheat farming by providing farmers with subsidized inputs such as seeds and fertilizers. This has led to an increase in wheat production in the country. However, wheat farming in Kenya is faced with various challenges such as pests and diseases, high production costs, low prices, and inadequate storage facilities.

Despite these challenges, wheat farming in Kenya remains an important economic activity, providing employment and income to many farmers. The crop is also an important source of food for many Kenyans, with wheat flour being used to make various food products such as bread, cakes, and biscuits.

Identification of Wheat Pests in Kenya

Wheat is an important cereal crop in Kenya and is susceptible to various pests and diseases. Identifying these pests is crucial in determining the appropriate control measures to be taken to mitigate their impact. Here are some of the common pests that affect wheat in Kenya:

  • Aphids: Aphids are small, soft-bodied insects that feed on the sap of the wheat plant. They can cause significant yield losses if left unchecked. The most common species of aphids that affect wheat in Kenya are the Russian wheat aphid and the cereal aphid.
  • Armyworms: Armyworms are the larvae of moths and can cause severe damage to wheat crops. They feed on the leaves of the plant and can quickly strip a field of its foliage.
  • Stem borers: Stem borers are the larvae of moths that bore into the stem of the wheat plant, causing it to weaken and eventually collapse. The most common species of stem borers that affect wheat in Kenya are the African maize stem borer and the sugarcane stem borer.
  • Thrips: Thrips are tiny insects that feed on the leaves of the wheat plant, causing them to turn yellow and die. They can also transmit viruses to the plant, further reducing its yield.

It is important to note that these pests can also affect other cereal crops in addition to wheat. Farmers should therefore be vigilant in monitoring their crops for any signs of infestation and take appropriate measures to control them.

The Impact of Wheat Pests on Crop Yield and Quality

Wheat is a valuable crop in Kenya, providing a source of food and income for many farmers. However, the crop is susceptible to a variety of pests that can significantly reduce crop yield and quality. In this section, we will discuss some of the most common pests affecting wheat in Kenya and their impact on crop production.

wheat pest

One of the most damaging pests affecting wheat in Kenya is the wheat stem sawfly. This pest can cause significant yield losses, with up to 50% of the crop being destroyed in severe infestations. The larvae of the sawfly bore into the stem of the wheat plant, causing the stem to weaken and eventually collapse. This can result in lodging, which makes it difficult to harvest the crop and can also increase the risk of disease.

Another common pest affecting wheat in Kenya is the Hessian fly. This pest can cause yield losses of up to 30%, with the larvae feeding on the stem and causing the plant to weaken and become stunted. The Hessian fly can also transmit diseases, such as barley yellow dwarf virus, which can further reduce crop yield and quality.

Other pests affecting wheat in Kenya include aphids, which can transmit viruses, and armyworms, which can cause significant damage to the leaves and stems of the plant. In addition to reducing crop yield, these pests can also affect the quality of the wheat, with infestations often resulting in lower protein content and poor milling quality.

To mitigate the impact of pests on wheat production in Kenya, farmers can employ a variety of strategies, including crop rotation, planting resistant varieties, and using integrated pest management techniques. By taking proactive measures to prevent and control pest infestations, farmers can help ensure a healthy and productive wheat crop.

Preventative and Control Measures for Wheat Pests in Kenya

Kenyan wheat farmers face a range of pests that can significantly reduce crop yields. To prevent and control these pests, farmers should adopt integrated pest management (IPM) strategies that use a combination of cultural, biological, and chemical control methods.

Cultural control methods include practices that make the environment less favorable for pests. For example, farmers can rotate crops to disrupt pest life cycles, plant pest-resistant varieties of wheat, and use clean seed to prevent the introduction of pests. Farmers can also use trap crops to lure pests away from wheat fields and into areas where they can be more easily controlled.

Biological control methods use natural enemies of pests to reduce their populations. For example, farmers can introduce beneficial insects, such as ladybugs, lacewings, and parasitic wasps, that feed on pests. Farmers can also use microbial pesticides, such as Bacillus thuringiensis, that infect and kill pests.

Chemical control methods involve the use of pesticides to kill pests. However, these should be used judiciously to avoid the development of pesticide resistance and the harm of non-target organisms. Farmers should use pesticides that are specific to the pest being targeted and apply them at the appropriate time and rate.

Finally, farmers should monitor their fields regularly for signs of pest infestations and take action as soon as they are detected. Early detection and control can prevent pests from causing significant damage to crops.

Examples of Pest-Resistant Wheat Varieties in Kenya
Wheat Variety Pest Resistance
Kwale Hessian Fly, Russian Wheat Aphid
Pasa Russian Wheat Aphid
Robin Hessian Fly, Russian Wheat Aphid

In conclusion, preventing and controlling wheat pests in Kenya requires a multifaceted approach that includes cultural, biological, and chemical control methods. By adopting integrated pest management strategies, farmers can reduce the impact of pests on their crops and increase their yields.


Wheat farming in Kenya faces significant challenges from pests and diseases. The most damaging pests include aphids, stem rust, and armyworms. These pests can reduce crop yields by up to 100%, leading to significant economic losses for farmers.

Climate change is exacerbating the problem by creating more favorable conditions for pests to thrive. As temperatures rise and rainfall patterns change, pests are spreading to new areas and becoming more difficult to control.

However, there are several measures that farmers can take to manage pest infestations. These include:

  • Planting resistant varieties of wheat that are less susceptible to pests and diseases
  • Rotating crops to reduce pest buildup in the soil
  • Using integrated pest management techniques, such as biological control and crop monitoring
  • Applying pesticides judiciously and following best practices for their use

It is also important for farmers to stay informed about the latest pest and disease threats and to work together with researchers and extension agents to develop effective control strategies.

Overall, while pests and diseases pose significant challenges to wheat farming in Kenya, there are steps that farmers can take to mitigate their impact and ensure a more sustainable future for the industry.

Also Read: Wheat Farming In Kenya

Sources: Duveiller, Etienne, Ravi P. Singh, and Julie M. Nicol. “The challenges of maintaining wheat productivity: pests, diseases, and potential epidemics.” Euphytica 157.3 (2007): 417-430. Link: https://link.springer.com/article/10.1007/s10681-007-9380-z

Tadesse, Wuletaw, Zewdie Bishaw, and Solomon Assefa. “Wheat production and breeding in Sub-Saharan Africa: Challenges and opportunities in the face of climate change.” International Journal of Climate Change Strategies and Management 11.5 (2019): 696-715. Link: https://www.sciencedirect.com/science/article/pii/S0261219416301004

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John Kamau is a highly experienced agriculture expert based in Kenya. He holds a degree in Agriculture from the University of Nairobi and has over 15 years of experience in the field. Throughout his career, John has been committed to promoting sustainable agriculture practices in Kenya. He has worked with small-scale farmers in rural communities to improve their crop yields, implement irrigation systems, and adopt environmentally friendly farming practices. John is also an expert in the use of technology in agriculture. He has worked with organizations to develop mobile applications that help farmers access information about weather patterns, market prices, and best practices for crop management. In addition to his work in Kenya, John has also been involved in agricultural projects in other African countries, including Tanzania and Uganda. He has served as a consultant for the United Nations Food and Agriculture Organization and has been recognized for his work with numerous awards.


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