Short-necked flea beetle

Systematic position: The short-necked flea beetle (Altica brevicollis) belongs to the order Coleoptera and the family Chrysomelidae. This species is a well-known agricultural pest, characterized by its jumping hind legs and its ability to inflict rapid damage on young vegetation in early spring.

Host plants: This pest primarily targets plants within the Amaranthaceae (formerly Chenopodiaceae) family. It is most frequently encountered on sugar, fodder, and garden beet crops. In the absence of primary food sources, it may also utilize various weed species, which can serve as a bridge for infestation during the growing season.

Biology and life cycle: The insect undergoes a complete metamorphosis. Adults overwinter in the soil or under surface debris. As temperatures rise in the spring, they emerge to feed on young seedlings. Females lay eggs near the host plants, and the emerging larvae develop by consuming plant tissues, progressing through several larval stages before pupation in the soil.

Character of damage and economic importance: Adults cause distinct damage by chewing small, characteristic "shot-holes" in the leaves. Severe infestations can result in extensive defoliation, leading to stunted growth or total seedling death. The most significant damage occurs at the cotyledon stage, often forcing farmers to perform reseeding in affected areas.

• Implement crop rotation to disrupt the life cycle of the beetle.
• Apply insecticidal seed treatments to provide early-season protection.
• Conduct regular field scouting during the emergence of seedlings.
• Control weed species, particularly those in the Amaranthaceae family, to reduce population levels.
• Utilize foliar applications of registered insecticides when thresholds are exceeded to protect the crop canopy.