White-marked fleahopper

The white-marked fleahopper (Spanagonicus albofasciatus) is a member of the Miridae family within the order Hemiptera. It is a well-documented pest known for causing economic damage to various high-value agricultural commodities across North America.

This insect is a generalist feeder, with host plants including cotton, alfalfa, peanuts, and a variety of wild legumes. Its ability to thrive on diverse vegetation makes it a resilient pest that can move between crops and uncultivated edges depending on the season and host availability.

The biological cycle of the fleahopper is rapid, especially under warm conditions. The female inserts eggs into the plant tissue, which protects them until hatching. After hatching, the nymphs go through several molting stages before reaching adulthood, with multiple generations overlapping throughout the growing season.

Damage occurs when the insect pierces the plant tissue with its mouthparts to feed on cell contents. This feeding activity leads to stunted growth, distorted foliage, and the abortion of squares and blooms in cotton. The necrotic spots left by feeding can also lead to secondary pathogens entering the plant structure.

Management strategies focus on a multi-tiered approach:

• Frequent scouting of fields during the early flowering stages.
• Using thresholds to determine if insecticide application is required.
• Cultural practices such as weed management to reduce alternate hosts.
• Preserving beneficial arthropods that predate on fleahopper eggs and nymphs.