Fig scale

The fig scale (Parasaissetia ficicola) is a sap-sucking insect belonging to the order Hemiptera and the family Coccidae. This pest is a significant threat to various ornamental plants, particularly in greenhouse conditions and tropical climates, where it can establish large, damaging populations.

The primary hosts for this species include various species of Ficus, although it is also known to infest citrus, coffee, and mango plants. Because the adult females are sessile and protected by a robust, scale-like cover, they are often difficult to detect until the infestation has already reached a significant level.

The life cycle begins with the egg stage, progressing to the mobile crawler stage. The crawlers are the primary means of dispersal within a greenhouse. Once a crawler finds a suitable feeding site, it settles, secretes a protective waxy shield, and begins to feed, eventually transitioning into the reproductive adult stage through parthenogenesis.

The damage caused by Parasaissetia ficicola is extensive due to the continuous extraction of plant sap. Key symptoms include:

• Chlorosis and necrosis of leaf tissue;
• Stunted shoot growth and premature leaf drop;
• Accumulation of honeydew on foliage;
• Growth of sooty mold, which impairs photosynthesis.

Effective management requires a multi-faceted approach, emphasizing systemic insecticides that are absorbed by the plant and ingested by the scale insects. Scouting for crawlers is critical for timing chemical applications. Additionally, maintaining good sanitation by pruning and destroying heavily infested plant material helps to reduce the total population pressure within the cultivation environment.