Tylodorus acuminatus

Tylodorus acuminatus belongs to the phylum Nematoda, order Dorylaimida, and family Longidoridae. It is a microscopic soil-dwelling worm.

The representative is characterized by the specific structure of the head region and a pronounced pointed tail, reflected in its species epithet.

The nematode body is elongated, cylindrical, and translucent, making identification difficult without specialized laboratory microscopy.

This species is a highly specialized ectoparasite that uses its long stylet to feed on the contents of plant root cells.

Species identification requires a phytoparasitological analysis of soil and root system samples in an accredited laboratory.

The primary hosts of this nematode are trees, shrubs, and various agricultural crops grown in both greenhouse and field conditions.

The pest damages the root system, disrupting the normal uptake of water and mineral nutrients from the soil.

The greatest damage occurs in nurseries and young orchards, where root injury leads to a sharp decline in seedling survival rates.

A secondary factor of damage is plant weakening, making them highly susceptible to secondary colonization by pathogenic fungi and bacteria.

Infected specimens show significant growth retardation, leaf chlorosis, and general depression of vegetative organs.

The biological cycle of the nematode is closely linked to soil temperature and moisture, maintaining activity throughout the growing season.

Migration and intense feeding of the pest occur primarily during periods of active plant root system growth.

Optimal conditions for reproduction and feeding occur in moderately moist soils with sufficient oxygen availability.

During the winter, as temperatures drop, the nematode enters an anabiotic state, surviving in deeper soil layers or near host roots.

The development cycle includes several larval stages, each requiring a molt, depending on external abiotic environmental factors.

The first sign of infestation is uneven plant growth in the field (patchy stunting), often appearing in clusters.

In cases of severe infestation, the root system looks deformed, with frequent necrosis of root hairs and young root tips.

The appearance of the above-ground part is characterized by a general nutrient deficiency, manifesting as leaf reddening or yellowing.

Upon examination of the roots, one can notice the absence of a healthy peripheral network, and the plant is easily pulled from the soil due to poor anchorage.

Diagnosis is confirmed only upon the detection of Tylodorus acuminatus individuals directly in the root-zone substrate.

The primary method of control is the implementation of crop rotation, including crops that are unfavorable for nematode reproduction.

Applying agrotechnical measures, such as deep autumn plowing, contributes to reducing the pest population density in the soil.

An important factor remains the use of nematode-free planting material that has undergone preliminary phytosanitary inspection.

Chemical control includes the application of soil fumigants or nematicides, although their use is restricted by environmental regulations.

• Regular soil health monitoring.
• Using cover crops (mustard, oil radish) as precursors.
• Disinfection of potting mixes in greenhouse production.