Skip to main content
. 2022 May 5;20(5):e07301. doi: 10.2903/j.efsa.2022.7301
Rating of the likelihood of pest freedom Almost always pest free (based on the Median)
Percentile of the distribution 5% 25% Median 75% 95%
Proportion of pest free bundles

9,996

out of 10,000 bundles

9,997

out of 10,000 bundles

9,998

out of 10,000 bundles

9,999

out of 10,000 bundles

10,000

out of 10,000 bundles

Proportion of infested bundles

0

out of 10,000 bundles

1

out of 10,000 bundles

2

out of 10,000 bundles

3

out of 10,000 bundles

4

out of 10,000 bundles

Summary of the information used for the evaluation

Possibility that the pest/pathogen could enter exporting nurseries

Pratylenchus loosi is a polyphagous, migratory endoparasite found in both soil and roots. It is considered the most serious pest of tea in Sri Lanka and many other tea‐producing countries including India, Japan, Korea, Taiwan, Iran and Russia. Yield reduction can range from 4 to 40%. Damage is greater in young infested tea plantations and nurseries where damage of 60 to 100% may occur if adequate control measures are not taken. This nematode has also been found on several important crops such as apples, oranges, pears, potatoes, eggplants, wheat, lentils, pasture grasses, coffee, cabbage and bananas.

In Turkey, P. loosi has been reported from limited areas in very low populations in potato, eggplant, wheat and lentils but has not been found on apples. According to the available information, the nematode has been reported on cultivated plants in Turkey in two regions (Sanliurfa, Ankara). So far, no epidemics or economic losses have been reported in Turkey, but uncertainties exist due to lack of data from official monitoring surveys and reports of problems caused by this nematode in Turkish apple production.

The main pathways of this nematode are infested plants for planting, contaminated water, soil and growing media as such or attached to plants, agricultural machinery, tools and shoes. This nematode may be present in the roots of apple plants or other host plants found in the environment and may infest the commodity mainly through human‐assisted dispersal.

Measures taken against the pest/pathogen and their efficacy

The relevant proposed measures are: (i) Inspection, certification and surveillance, (ii) Sampling and laboratory testing, (iii) Selection of production sites, (iv) Removal of soil from roots (washing), and (v) Pre‐consignment inspection.

Interception records

There are no records of interceptions from Turkey.

Shortcomings of current measures/procedures

Root‐lesion nematodes (Pratylenchus spp.) are not on the list of harmful organisms systematically monitored or tested for their presence on plants intended for planting in Turkey. Soil and plants are tested in the laboratory only for the presence of root‐knot and virus vector nematodes, but not for the presence of Pratylenchus spp. The undetected presence of this nematode during inspections may contribute to the spread of P. loosi infection. In addition, pre‐export root washing does not reduce the risk of nematode infestation in plants intended for planting that are infested with root lesion nematodes (migratory endoparasites).

Main uncertainties

• Soil is laboratory tested only for the presence of root‐knot and virus vector nematodes, but not for the presence of Pratylenchus spp.

• Symptoms caused by P. loosi may be overlooked.

• Presence of P. loosi is not easy to be detected.

• Root washing does not reduce the risk of nematodes (migratory endoparasites) infestation in plants intended for planting.