Pasture spittlebug

Deois flavopicta is a major agricultural pest belonging to the order Hemiptera and the family Cercopidae, commonly known as the spittlebug. It is native to the Neotropical region and is particularly recognized for causing extensive damage to pastures and forage systems in South America.

The primary hosts of this species include various forage grasses, especially those belonging to the genus Brachiaria. Beyond pastures, Deois flavopicta can also infest crops such as sugarcane and maize. These plants provide the necessary moisture and nutrients required for the insect's rapid growth and reproduction cycles.

The life cycle of the pasture spittlebug progresses through the egg, nymph, and adult stages. Nymphs are distinct because they produce a protective mass of froth or "spittle" around themselves. This substance serves as a barrier against desiccation and predators, allowing them to thrive even during fluctuating environmental conditions in the grasslands.

Damage occurs when both nymphs and adults feed on the plant's xylem sap. This feeding process results in severe physiological stress to the plant, manifested by yellowing leaves, stunted development, and reduced photosynthetic capacity. In instances of high infestation, the foliage can wither and die completely, significantly impacting biomass production for livestock.

Integrated pest management strategies are essential to mitigate the impact of this pest. Key control methods include:

• cultural practices such as timely mowing to disturb nymphal habitats;
• biological control through the application of entomopathogenic fungi like Metarhizium anisopliae;
• maintaining healthy and vigorous plant cover;
• targeted application of insecticides based on regular population monitoring.