Biological control is one of the important modern approaches to agricultural pest management. It relies on the use of living organisms or their products to reduce populations of pests that affect agricultural crops. Among the biological agents that have received considerable attention in this field are entomopathogenic fungi, due to their natural ability to infect a range of insect species and affect their survival, making them an important option within integrated pest management programmes. Entomopathogenic fungi are distinguished by their ability to infect insects by directly penetrating their bodies, unlike some pathogens that require ingestion and entry through the insect’s digestive system. One of the most widely studied species in this field is Beauveria bassiana, which can infect a variety of insect pests. The infection process begins when fungal spores attach to the surface of the insect’s body. Under suitable environmental conditions, the spores germinate and produce structures that enable the fungus to penetrate the insect’s outer covering and reach its internal tissues. After entering the insect’s body, the fungus grows internally and utilizes the insect’s nutrients, weakening it and disrupting its vital functions, which may eventually lead to its death. In some cases, following the death of the insect, the fungus grows on the surface of its body and produces new spores, allowing the infection to spread to other individuals when suitable conditions are available. The effectiveness of entomopathogenic fungi in pest control depends on several factors, including the target insect species, temperature, humidity, the agricultural environment, the insect’s developmental stage, as well as the quality of the fungal formulation and its method of application. Humidity is particularly important for successful spore germination and the continuation of the infection process, while unsuitable temperatures may limit fungal growth and reduce its effectiveness. An important advantage of using these fungi is their potential integration into Integrated Pest Management (IPM) programmes alongside appropriate agricultural, mechanical, and other control methods. This approach can help reduce reliance on the intensive use of chemical pesticides, while ensuring that the appropriate biological agent is selected and applied according to environmental conditions and the characteristics of the target pest. The success of fungal control does not depend solely on selecting the appropriate fungal species; it is also closely associated with the effectiveness of the formulation, the application method, and the timing of treatment. Therefore, making optimal use of these fungi requires careful scientific evaluation to determine the conditions that provide the highest level of effectiveness against the target pest. With the growing focus on sustainable agriculture and reducing the environmental impacts of chemical pesticides, entomopathogenic fungi represent a promising biological option for pest management. Continued scientific research can contribute to developing more effective fungal formulations, improving application methods, and identifying suitable environmental conditions for their use, thereby supporting the development of more sustainable agricultural pest management programmes. Thus, entomopathogenic fungi represent an important biological tool that can contribute to crop protection and the reduction of certain pest populations, while being integrated into integrated pest management programmes according to scientific principles that take into account the characteristics of the fungus, the insect, and the surrounding environmental conditions. Al-Mustaqbal University is the first one university in Iraq.