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Root-Knot Nematode Management: Nematicides

North Carolina

Table 1. The below table has been adapted from the 2022 North Carolina Agricultural Chemicals Manual and the NC State Extension Sweetpotato Root-Knot Nematode Factsheet.

Fumigants and Non-Fumigants

Material (Product)Product TypeApplication MethodRate/AcreRate/1000 Ft RowSchedule and RemarksEfficacy Against M. incognitaEfficacy Against M. enterolobii
1,3-dichloropropene
(Telone II)
FumigantSee label15 to 27 gal

153 to 275 lb
See labelSee labelExcellentGood
chloropicrin
(Chloropicrin)
FumigantSee label48.6 gal

150 to 350 lb
See labelSee labelFairPoor
ethoprop
(Mocap 15G)
Non-FumigantBand only20 to 26 lb1.6 to 2.1 lbIncorporate 2 to 4” deep in centered 12 to 15” band (at least 42” row spacing) 2 to 3 wk before planting. Use no more than 1 application per season.Requires further testing.Requires further testing.
ethoprop
(Mocap EC)
Non-FumigantBand only63.5 to 85.9 fl. oz5.1 to 6.9 fl. ozIncorporate 2 to 4” deep in centered 12 to 15” band (at least 42” row spacing) 2 to 3 wk before planting. Use no more than one application per season.Requires further testing.Requires further testing.
oxamyl
(Vydate L)
Non-FumigantPreplant foliar

Drip/soil injection

Chemigation: In furrow
See labelNote: Vydate L is labeled for these crops to manage nematodes and certain insects.
However, the label varies by crop, method of application and state. Therefore, follow the label carefully for the best method, rate, and timing.
GoodPoor
fluopyram
(Velum Prime)
Non-FumigantChemigation6.0 to 6.84 fl. ozApply as post-planting drench, or hill drench. May offer suppression only if root-knot pressure is high and other methods of suppression should also be employed. Velum Prime is also registered to suppress white mold (Sclerotinia sclerotiorum).Good Fair
fluensulfone
(Nimitz)
Non-FumigantBroadcast soil3.5 to 7.0 ptN/AApply and incorporate 6 to 8” deep at least 7 days before transplanting. Irrigate with 0.5 to 1.0 in. of water 2 to 5 days after application.GoodPoor
Non-FumigantBanded soilSee labelSee labelTable 2 in label specifies rate based on row spacing. Incorporate 6 to 8” deep at least 7 days before transplanting. Irrigate with 0.5 to 1.0 in. water 2 to 5 days after application.GoodPoor
Non-FumigantDrip irrigationTable 3 in label specifies rate based on bed width. Uniformly wet entire bed width and root zone 6 to 8 in. deep at least 7 days before transplanting. Irrigate with 0.5 to 1.0” of water 2 to 5 days after application.GoodPoor
fluazaindolizine
(Reklemel Active)
Non-FumigantSee labelSee labelSee labelSee labelRequires further testing.Requires further testing.

Table 2. The below table has been adapted from the Majestene Specimen Label.

Biologicals

Active IngredientMethod of ApplicationRate per AcreTiming of ApplicationComments
Heat-killed Burkholderia spp. strain A396 & Spent Fermentation Media
(Majestene)
In-Furrow

Directed/Banded Application

Broadcast Application and Sprinkler Chemigation
4-8 quarts

At planting.

During cultivation.


Prior to planting, at planting or shortly
thereafter, at transplant or shortly thereafter and in season on a 21-28 day interval as needed to maintain control.
See label.

South Carolina

Table 3. The below table has been adapted from the 2022 Southeastern US Vegetable Crop Handbook.

DiseaseMaterialFRAC CodeRate of Material FormulationMinimum DaysMethod, Schedule, and Remarks
Harv.Reentry
Nematodesfluopyram
(Velum Prime)
76.0 to 6.84 fl oz/acre70.5Limit to 0.466 lbs fluopyram per acre per year. Do not make more than two sequential applications of Group 7-containing fungicides.

Louisiana

Table 4. The below table has been adapted from the 2022 Southeastern US Vegetable Crop Handbook.

DiseaseMaterialFRAC CodeRate of Material FormulationMinimum DaysMethod, Schedule, and Remarks
Harv.Reentry
Nematodesfluopyram
(Velum Prime)
76.0 to 6.84 fl oz/acre70.5Limit to 0.466 lbs fluopyram per acre per year. Do not make more than two sequential applications of Group 7-containing fungicides.

Mississippi

Table 5. The below table has been adapted from the 2022 Southeastern US Vegetable Crop Handbook.

DiseaseMaterialFRAC CodeRate of Material FormulationMinimum DaysMethod, Schedule, and Remarks
Harv.Reentry
Nematodesfluopyram
(Velum Prime)
76.0 to 6.84 fl oz/acre70.5Limit to 0.466 lbs fluopyram per acre per year. Do not make more than two sequential applications of Group 7-containing fungicides.

California

Table 6. The below table has been adapted from information provided by Dr. Scott Stoddard.

Nematode SpeciesMaterial (Product)Product TypeApplication MethodRate/AcreSchedule and Remarks
Root-knot nematodes
(Meloidogyne spp.)
1,3-dichloropropene
(Telone)
FumigantShank applications at 18 – 24” into moist soil followed by surface sealing. All
applications subject to township caps and time of application restrictions. Fumigation management plan required.
10 – 12 gpa typical. See label for specific guidelines.Thus far, no management thresholds have been developed, but the general rule is that counts above 100 RKN per pint (500 cc) of soil, taken in the fall while soil is still moist from irrigation has indicated that treatment is warranted.
Methyldithiocarbamate
(Metam sodium, metam potassium)
FumigantShank applications permitted. 9” row spacing at 3”, 6”, and 12” depth into moist soil, followed by soil sealing with light disc or ring-roller.

May be applied through sprinklers. Water seal required.

Flood applications.
42 – 45 gpa. See label for specific guidelines.



60 to 75 gpa
Permit conditions for pre-plant applications subject to specific county Agriculture Commissioner guidelines. Minimum 100 ft buffers to occupied structures. Fumigation management plan required.
Ethoprop
(Mocap 15G)
Granular nematicide and insecticidePre-plant 2-3 weeks before transplanting and incorporated 4” deep. Banded applications to the row.20 – 26 lbs/ARestricted use material, limited to 1 application per season.
Fluensulfone
(Nimitz CA)


Fluopyram
(Velum)
Liquid nematicide



Liquid nematicide/fungicide
Broadcast application to soil 7 – 10 days before planting and incorporate to 6” with light disk.

Apply via drip tape around 6 and 8 weeks after transplanting.
3.5 – 5.0 pints/A



6.84 oz/A per application
Surface drip applications have not been evaluated.



Make 2 applications per season during middle of irrigation set.
Biologicals:
Burkholderia spp.
(Majestene)

Chromobacterium subtsugae
(Grandevo)

Paecilomyces lilacinus
(MeloCon)
WSG typicalSee label for product details. Pre-plant and incorporated common. Drip applications can be made after transplanting.See label.OMRI certified. Minimum of two applications, the first application at two weeks after transplanting, and the second application at four to six weeks after transplanting. The in- season use of biologicals does not eliminate the need for pre-plant nematode management.
Spirotetramat
(Movento)
InsecticideTwo foliar applications near or after layby when there is sufficient leaf cover for uptake and movement within the plant.5 oz/A per applicationSuppression only, the addition of other management necessary for control. Maximum 10 oz/A per season. Must be tank mixed with spray additive/adjuvant.

The use of brand names in this publication does not imply endorsement by NC State University or N.C. A&T State University of the products or services named nor discrimination against similar products or services not mentioned.
Recommendations for the use of agricultural chemicals are included in this publication as a convenience to the reader. The use of brand names and any mention or listing of commercial products or services in this publication does not imply endorsement by NC State University or N.C. A&T State University nor discrimination against similar products or services not mentioned. Individuals who use agricultural chemicals are responsible for ensuring that the intended use complies with current regulations and conforms to the product label. Be sure to obtain current information about usage regulations and examine a current product label before applying any chemical. For assistance in North Carolina, contact your local N.C. Cooperative Extension county center.