Broad-shouldered water striders
Broad-shouldered water striders of the family Veliidae are members of the order Hemiptera. Unlike common pond skaters, veliids are generally smaller and are adapted to inhabit both the surface film of water and the damp vegetation or soil along the margins of water bodies, allowing them to occupy diverse niches within an agricultural landscape.
What the section contains
Broad-shouldered water striders
While primarily predatory, these insects can become a nuisance in flooded agricultural systems, particularly in rice paddies. When populations reach high densities, they may feed on the young, tender tissues of emergent plants, causing physiological stress and making the plants more susceptible to secondary fungal or bacterial infections.
The biological cycle of Veliidae involves incomplete metamorphosis: egg, several nymphal instars, and the adult stage. Eggs are typically deposited on aquatic vegetation or submerged debris. The development rate is highly dependent on ambient water temperature and stagnant water conditions, which provide an optimal environment for rapid population growth.
Damage is characterized by localized tissue necrosis where the insects have pierced the plant stems or leaves located at the water line. This feeding behavior can lead to stunted growth and reduced vigor in young crop seedlings. In severe infestations, the cumulative effect can significantly impede the overall development of the rice crop.
Effective management strategies focus on water level manipulation and habitat modification.
- Periodically draining the fields to disrupt the life cycle.
- Clearing aquatic weeds that serve as breeding sites.
- Applying targeted insecticides only when economic thresholds are exceeded.