Dog-day cicada

The Tibicen genus, commonly known as dog-day cicadas, belongs to the family Cicadidae within the order Hemiptera. These large insects are well-known for the loud, rhythmic sounds produced by males to attract mates. In agricultural settings, they are recognized as potential pests affecting various woody plants.

Primary crops susceptible to damage by these insects include a wide variety of fruit trees, such as apples, pears, peaches, and grapevines. They are also frequently found on various ornamental and forest trees, utilizing them both as a food source and as a site for oviposition.

The biology and lifecycle of these cicadas are notably complex and protracted. The nymphs are subterranean, feeding on root sap, and may remain in the soil for several years before maturing. Once adults emerge, they mate and lay eggs in slits cut into tree branches, initiating the cycle anew for the next generation.

The damage caused is primarily mechanical, occurring when females cut slits into tender twigs to deposit their eggs. These wounds can lead to bark splitting, branch wilting, or structural breakage under the weight of fruit. Furthermore, heavy nymphal feeding on root systems can significantly weaken overall tree vigor and reduce agricultural yield.

• Perform regular pruning to remove and destroy branches containing egg slits.
• Use protective netting on young saplings during periods of peak cicada activity.
• Maintain clear orchard floors by controlling weeds and dense ground vegetation.
• Apply targeted insecticides when adult emergence reaches damaging levels.
• Promote general tree health through proper fertilization and irrigation to help trees recover from feeding.