Distribution of Plant Parasitic Nematodes Associated with Carrot (Daucus carota L., subsp. sativus) in North Showa Zone, Ethiopia
Distribution of Plant Parasitic Nematodes Associated with Carrot (Daucus carota L., subsp. sativus) in North Showa Zone, Ethiopia
Gemechu Kebede1*, Awol Seid2 and Belay Habtegebriel3
ABSTRACT
Carrot (Daucus carota L. subsp. sativus (Hoffm.)) is one of the most important vegetable crops nutritionally and economically worldwide as well in Ethiopia. Plant-parasitic nematodes (PPNs) reduce up to 12.3% of global food production on an annual basis. They account for about 25–50% of losses on carrots. The North Showa Zone is one of the major carrot-producing areas in Ethiopia yet the distribution of PPNs on carrots in this area remains unknown. Therefore, this survey study was carried out to know the distribution of PPNs on carrots in the North Showa Zone. The study detected a total of seven PPN genera from carrot crops in Ethiopia viz. Helicotylenchus, Hoplolaimus, Pratylenchus, Meloidogyne, Rotylenchulus, Scutellonema, and Tylenchorhynchus. The genus Meloidogyne was the most frequent, abundant, and prominent genus with a 62% frequency of occurrence, 217 juveniles/100 ml soil mean density, and a 174.14 prominence value, followed by Pratylenchus. M. incognita was more prevalent than M. javanica, with a 62.9% absolute frequency and a 70.83% relative frequency. This study would suggest future research efforts to focus on the determination of damage threshold, extent of yield loss, and extent of pathogenicity to the carrot in the country.
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