|Peanut Rootknot nematode||Classification||Hosts|
|Morphology and Anatomy||Life Cycle|
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Peanut Root-knot Nematode
|Meloidogyne arenaria is identified by the cuticular markings in the perineal area of the mature female. The low upper arch is rounded and marked by forking and sworls of striae near the lateral field.|
Cosmopolitan in warmer regions of the world.
C-rated pests in California.
Feeding site establishment and development typical of genus.
Vegetables, peanut, grasses, fruit, ornamentals, and tobacco.
For an extensive list of host plant species and their susceptibility, copy the name
select Nemabase and paste the name in the Genus and species box
Causes damage to peanuts in southeastern U.S. (e.g., large galls on roots, pegs, pods, and runners; reduced plant growth).
75% of Japanese forest trees imported into Brazil and planted in M. arenaria-infested soil died.
Nematode interacts with fungi in disease complexes: Fusarium oxysporum infects wilt-resistant tobacco in presence of M. arenaria, M. incognita, and M. javanica. Similar increase in wilt incidence occurs in watermelon and tomato.
Peanut root, peg, and pod rot in Florida involves M. arenaria and a series of soil fungi, including Pythium, Rhizoctonia, Aspergillus, etc.
Use of M. incognita-resistant tobacco varieties in North Carolina has resulted in selection for M. arenaria - which is more pathogenic to tobacco than M. incognita.
Nematicides are usually recommended for crops of higher value, i.e., peanuts, tobacco, and peach.
Systemics (Aldicarb) have been useful in greenhouse ornamentals grown in Europe.
Sources of host-plant resistance have been difficult to find. Populations able to overcome Meloidogyne resistance in grape rootstocks are often identified as M. arenaria.
Host Plant Resistance, Non-hosts and Crop Rotation alternatives:
For a list of plant species or cultivars (if any) reported to be immune or to have some level of resistance to this nematode species, copy the name
select Nemabase Resistance Search and paste the name in the Genus and species box