Issids
The family Issidae belongs to the order Hemiptera, suborder Auchenorrhyncha. This group of small insects has evolved to feed on the sap of various higher plants. Visually, members of the family often resemble small beetles due to the specific shape of their wings, which are held tightly against the body, but their mouthparts are specialized as piercing-sucking stylets.
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Issids
The range of affected crops is extensive. Issids are polyphagous and can be found on fruit trees, vineyards, vegetable crops, and ornamental shrubs. Often, these pests colonize weeds, which serve as intermediate habitats for the migration of insects into agricultural fields.
The biology and life cycle of issids are characterized by incomplete metamorphosis. Females lay eggs within plant tissues or the soil substrate. Nymphs, passing through several instars, actively feed on plant sap, secreting "honeydew," which serves as a nutrient medium for the growth of sooty mold, further inhibiting plant photosynthesis.
The damage caused involves the exhaustion of plants due to the loss of nutrients and moisture. At the sites of stylet penetration, necrotic spots and shoot deformations may occur. Furthermore, issids can act as vectors for phytoplasma diseases, causing significantly more damage to crop yields than the mere physical destruction of plant tissues.
Protection measures include both agrotechnical and chemical methods. It is crucial to implement regular weed control, as weeds serve as pest reservoirs. In cases of high infestation, the application of systemic or contact-stomach insecticides is recommended, while strictly adhering to pre-harvest intervals.
- Spatial isolation of plantings.
- Population monitoring using sticky traps.
- Application of biological pesticides during early developmental stages.
- Regular pruning and thinning of tree canopies.