Influence of Leaf Surface Morphology on Colonization and Reproduction of Tetranychus cinnabarinus on Cucumber

Abstract

Influence of leaf surface morphology on colonization and reproduction of Tetranychus cinnabarinus on cucumber was investigated to understand host plant structural effects on mite establishment and population development. Cucumber leaves exhibiting variation in trichome density, epidermal wax deposition, and surface roughness were evaluated under controlled laboratory and greenhouse conditions. Mite colonization behavior was assessed through infestation assays, while reproductive parameters including fecundity, developmental duration, and survival rate were recorded. Results demonstrated that leaf surface morphology significantly affected mite attachment, feeding efficiency, and subsequent population growth. Leaves with higher trichome density and thicker wax layers exhibited reduced colonization rates due to physical barriers that impeded mite movement and feeding access. In contrast, smoother leaf surfaces with lower structural resistance supported higher oviposition rates and faster population buildup. Microscopic observations indicated that mites preferentially aggregated in sheltered leaf regions with reduced mechanical interference, enhancing feeding success. Reproductive performance was strongly correlated with leaf surface suitability, with optimal conditions leading to increased egg production and accelerated life cycle completion. The study highlights the critical role of plant surface architecture in mediating host–pest interactions and influencing spider mite population dynamics. These findings provide valuable insights for breeding cucumber varieties with resistant morphological traits and support integrated pest management strategies aimed at reducing T. cinnabarinus infestations through host plant resistance mechanisms.