Vol. 12, Special Issue 11 (2023)

Author(s):
Prashant Mangalgikar, Karumuru Raja Madhura Bhanu, Vasuki Belavadi, Arvind Kumar PR, Chandrashekharaiah Muniyappa and Byrappa Ammagarahalli

Abstract:
The research aims to elucidate the Xylotrechus quadripes beetle's emergence patterns and their implications for effective management strategies. The examination of X. quadripes reveals a distinctive emergence pattern with two peaks in a single year, occurring in April–May and October–November. Contrary to historical perceptions that downplayed the significance of summer emergence, this study underscores its relevance in the pest's life cycle. Notably, winter emergence emerges as the predominant phenomenon, with a considerably higher number of beetles compared to the summer flight. The sex ratio dynamics, with males consistently appearing before females, align with broader trends in the Cerambycidae family and the genus Monochamus. Males consistently emerged prior to females. From a pool of 2000 infected stems, a total of 3524 beetles emerged in 2012, and 14374 beetles emerged in 2013, yielding an overall sex ratio of 0.46 and a distinct male bias. The observed sex ratios contribute to the understanding of insect population dynamics, with potential implications for pest management. Overall, this research enhances our comprehension of X. quadripes biology and behavior, laying the foundation for more targeted and effective control measures. The findings resonate beyond the Indian coffee plantations, offering valuable insights for coffee-producing regions worldwide facing similar challenges.