Seasonal population dynamics and environmental influences on Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) in peanut fields of Çukurova Region of Türkiye

İngilizce (OpenAlex)

This study investigated the seasonal population dynamics and environmental influences on Helicoverpa armigera in peanut (Arachis hypogaea L.) fields during 2021 and 2022 growing seasons in the Osmaniye and Adana provinces of Türkiye. A total of 2,931 and 2,099 adult moths were captured using five pheromone traps in 2021 and 2022, respectively, showing significant temporal variation (F = 12.05; P = 0.0001; F = 29.49; P = 0.0001). In 2021, a major population peak occurred on 16th August (145.2 moths/trap), while in 2022, two distinct peaks were observed, with the highest on 1st September (80.2 moths/trap). Larval counts reflected adult activity, with the highest numbers recorded on 16th August (2021) and 4th August (2022). Environmental monitoring revealed that temperatures ranged from 22.2°C to 30.2°C, while relative humidity varied between 31.8% and 78.0%. Both parameters exhibited a notable decline from mid-August to October.These fluctuations likely influenced moth emergence and larval development. Larval infestations were sporadic, underscoring variability in pest pressure. The results identify mid-August to early September as a critical period for implementing pest control strategies. The close alignment between environmental conditions, adult activity, and larval presence highlights the importance of integrated monitoring for effective H. armigera management in peanut cultivation.