Comb-horned crane fly

The Ctenophora genus, commonly known as comb-horned crane flies, belongs to the Diptera order and the Tipulidae family. These insects are distinguished by the unique pectinate (comb-like) antennae of the males. While their appearance can be alarming, adult flies are harmless to crops and primarily focus on reproduction during their short lifespan.

The larvae are the stage that causes agricultural concern. They inhabit soil or decaying wood and are highly dependent on high moisture levels. Because of this, they are frequently found in poorly drained agricultural fields, marshy lands, or areas near forests with significant organic matter buildup that provides food and shelter for the developing larvae.

The primary damage is caused by the larvae feeding on underground plant parts. They gnaw on roots, tubers, and the base of seedling stems. This damage disrupts the plant's ability to absorb nutrients and water, often resulting in yellowing, stunted growth, or the sudden death of young crops, particularly in the spring when larval activity reaches its peak.

The life cycle of the comb-horned crane fly involves a complete metamorphosis. Eggs are laid in moist soil, followed by several larval instars. The larval stage is long-lasting, sometimes spanning over a year, depending on environmental factors. Pupation occurs in the soil, leading to the emergence of adult flies, which are most active during the warmer months of the year.

Effective management requires a combination of strategies to minimize larval survival. Key methods include improving field drainage to reduce the moisture levels favored by larvae and performing deep soil cultivation to disrupt their habitat. In severe infestations, targeted soil insecticides may be used, though preventative cultural practices remain the most sustainable approach for long-term control.