Pine wilt disease, caused by the pinewood nematode Bursaphelenchus xylophilus, poses a significant threat to pine forests around the world. Traditional management methods are often ineffective and can have negative ecological impacts, prompting a search for alternative, more sustainable solutions. Recent research has explored the potential of Esteya fungi as a biocontrol agent to help manage this disease.
In this study, researchers focused on two Esteya species, Esteya vermicola and Esteya floridanum, investigating their ability to suppress the pinewood nematode. The study used a combination of biological, biochemical, and molecular methods to assess the fungi’s effectiveness and suitability for biocontrol. The findings indicate that both species can successfully reduce the nematode population under controlled conditions.
One of the notable discoveries of the study is that Esteya fungi can also compete with other fungi commonly found in the pine wilt disease system, such as Leptographium terebrantis and Ophiostoma ips. These fungi are often part of the disease process and could hinder Esteya’s success in the environment. However, the study found that Esteya species are able to coexist with these fungi, an important ecological factor that could improve their effectiveness as biocontrol agents. Another key finding is that E. vermicola can metabolise a broader range of carbon sources than E. floridanum. This ability may give E. vermicola an advantage in establishing itself within pine trees, which is critical for the fungi to successfully control the nematode.
Scientists suggest that a preventive (prophylactic) application of Esteya fungi could be an effective strategy for controlling both the pinewood nematode and the associated fungal pathogens. This approach may offer a more environmentally friendly and sustainable solution compared to conventional methods.
This research contributes to a growing body of evidence supporting the use of Esteya fungi as a biocontrol agent for managing pine wilt disease. By better understanding how these fungi work, researchers may be able to develop more targeted and effective strategies for protecting pine forests worldwide.
For more details, the full paper is available here.
Full reference
Pires, D., Vicente, C.S.L., Mota, M. and Inácio, M.L. 2024. Polyphasic approach to the selection of Esteya isolates for the control of the pinewood nematode, Bursaphelenchus xylophilus. Fungal Biology, 128(8), 2242-2249.
