Phytalus sanctipauli

Systematic position. Phytalus sanctipauli belongs to the order Coleoptera, family Scarabaeidae. It is a significant agricultural pest, morphologically related to May beetles, primarily found in South American regions where it poses a recurring threat to local agriculture.

Host plants. This species causes serious damage to sugarcane, corn, and various pasture grasses. The larvae of this pest feed on the root systems of these plants, which leads to the weakening and eventual death of both young seedlings and mature plants.

Biology and life cycle. The complete life cycle of Phytalus sanctipauli typically lasts from one to two years depending on local environmental conditions. Adult beetles are crepuscular and feed on foliage, while the primary damage is caused by the larvae (grubs) that reside deep within the soil profile.

Damage and economic impact. The destructive nature of the larvae is due to their habit of pruning and consuming root systems. Affected plants cannot absorb water or essential nutrients effectively, resulting in chlorosis, lodging, and drastic yield losses. In severe infestations, farmers may experience yield reductions exceeding 50%.

Control measures. Management of this pest requires an integrated approach combining agronomic and chemical strategies:

• Crop rotation with non-host plants to disrupt the life cycle.
• Deep tillage of soil to mechanically destroy larvae.
• Application of soil insecticides such as imidacloprid or fipronil at the time of planting.
• Utilizing biological control agents, specifically entomopathogenic fungi like Metarhizium anisopliae.