Nematology (2002) 4, 65-71

Yuji Oka and Shimon Pivonia (2002)
Use of ammonia-releasing compounds for control of the root-knot nematode Meloidogyne javanica
Nematology 4 (1), 65-71
Abstract: The nematicidal activities of ammonia-releasing and ammonium compounds were tested against the root-knot nematode Meloidogyne javanica in pot, microplot and field experiments. Among ten compounds tested, NH₄OH, (NH₄)₂HPO₄ and NH₄HCO₃ showed greatest nematicidal activity at concentrations of 300 mg N/kg of NH₄ or NH₂ in pots. NH₄OH was found to be the most nematicidal of these compounds. Enclosure of pots containing NH₄OH-treated soils in plastic bags reduced the concentration of NH₄OH needed to kill the nematodes from 200 mg N/kg in open pots to only 75 mg N/kg. In a microplot experiment, treatment of nematode-infested soil with NH₄OH at 70 mg N/kg reduced the root-galling index to 0. In one field experiment, the nematicidal efficacy of NH₄OH on tomato plants at doses of 1000 and 2000 kg N/ha was equivalent to those of Telopic C35^® or metham sodium in combination with cadusafos. In another field experiment, NH₄OH at 500 and 1000 kg N/ha increased tomato yield and at 1000 kg N/ha reduced the galling index, compared with untreated controls. The results suggest that NH₄OH may serve as a nematicide in alkaline sandy soils.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Yuji Oka, Shimon Pivonia

Research topic(s) for pests/diseases/weeds:
control - general

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Meloidogyne javanica	Tomato (Solanum lycopersicum)