False meadow lesion nematode

Systematic position: The pest belongs to the phylum Nematoda, class Chromadorea, order Rhabditida, and family Pratylenchidae. It is classified as a migratory endoparasitic nematode, known for its ability to penetrate and feed on the root cortical tissues of various plants, causing significant economic damage.

Host range: Pratylenchus pseudopratensis is a polyphagous parasite. It infests a diverse range of crops, including cereals (wheat, barley), maize, legumes, and several horticultural crops. Its presence in the rhizosphere of various weed species allows the population to persist in fields between cropping seasons.

Biology and life cycle: As a migratory endoparasite, this nematode moves freely in the soil and root tissues. The life cycle comprises eggs, four juvenile stages, and adults. Both juveniles and adults can penetrate roots, moving intracellularly, which leads to the mechanical destruction of root cells and facilitates the spread of the pathogen throughout the root system.

Nature of damage and pathogenicity: Infestation is characterized by the formation of necrotic lesions on the roots. These lesions result from the feeding activity of the nematodes. Severe damage leads to root system stunting, reduced nutrient uptake, and increased vulnerability to water stress. Furthermore, these lesions serve as entry points for secondary soil-borne fungi and bacteria, leading to root rot.

Control measures: Integrated Pest Management (IPM) is essential for controlling this nematode. Key strategies include:

• Implementing crop rotation with non-host plants or resistant cultivars.
• Rigorous control of weeds that act as alternative hosts.
• Sanitary measures to prevent the spread of infested soil.
• Chemical control using nematicides when infestation levels exceed economic damage thresholds.