Climate Change and Insect Population Dynamics in Balochistan: Implications for Pest Management, Pollinator Conservation, and Agroecosystem Resilience

Abstract

As one of the largest and physiographically most heterogeneous regions of Pakistan, Balochistan is increasingly vulnerable to the compounded impacts of climate change, including rising temperatures, altered precipitation regimes, recurrent flooding and intensifying heatwaves. These climatic shifts are driving insects along novel ecological trajectories with substantial consequences for agricultural productivity and ecosystem services. In the warmer lowland regions of Makran, Kharan and Nasirabad, elevated night-time temperatures and prolonged drought conditions are enhancing pest survival and reproductive potential, whereas episodic extreme heatwaves can suppress insect fecundity and impair the efficacy of natural enemies. In contrast, upland areas with historically strong cold constraints, such as Quetta, Kalat and Zhob, are experiencing pest range expansions and increased voltinism, while cold-adapted pollinators, including bumble bees, are declining due to warming-induced habitat loss. Major flooding events, particularly the record-breaking floods of 2022, have further altered insect dynamics by eliminating some ground-dwelling pest populations, facilitating the emergence of larval vectors and destroying ground-nesting pollinator habitats. Heatwaves exacerbate these disturbances by disrupting insect reproductive physiology, reducing nectar and pollen quality and diminishing pollination services for crops such as date palm, mango and vegetables. Collectively, these processes are contributing to more frequent pest outbreaks, rapid pollinator declines and weakened biological control, thereby threatening food security and rural livelihoods in Balochistan. Addressing these challenges requires climate-sensitive integrated pest management, restoration of pollinator habitats and flood-adaptive farming practices, supported by region-specific monitoring, multidisciplinary research and farmer-centered policy frameworks.