Nematicidal efficacy of MCW-2, a new nematicide of the fluoroalkenyl group, against the root-knot nematode Meloidogyne javanica.
BACKGROUND
The small number of available nematicides and restrictions on the use of non-fumigant nematicides owing to high toxicity to human and non-target organisms hinder effective nematode control. The nematicidal efficacy of MCW-2, a new nematicide of the fluoroalkenyl group, was evaluated against the root-knot nematode Meloidogyne javanica (Treub.) Chitwood.


RESULTS
MCW-2 showed irreversible nematicidal activity against second-stage juveniles of M. javanica in vitro, following exposure for 48 h at concentrations as low as 0.5 mg L(-1), in contrast to fenamiphos or cadusafos. When exposed to MCW-2 for shorter periods, motile juveniles became immobile with time after rinsing in water. MCW-2 at 8 mg L(-1) inhibited nematode hatching, which, however, recovered after rinsing in water. In pot and plot experiments, 0.5 mg MCW-2 L(-1) soil and 2 kg MCW-2 ha(-1), respectively, controlled M. javanica similarly to or better than fenamiphos or cadusafos at the same concentrations or at their recommended doses. In the soil, the nematicidal activity of MCW-2 was less persistent than that of fenamiphos.


CONCLUSIONS
MCW-2 has potential to be used as a new non-fumigant nematicide that probably has a novel mode of action.
Oka
Yuji
Y
Nematology Unit, Gilat Research Centre, Agricultural Research Organisation, Mobile Post Negev 85280, Israel. okayuji@volcani.agri.gov.il
Shuker
Shimshon
S
Tkachi
Nadia
N
D000818:Animals; D018551:Solanum lycopersicum / Q000469:parasitology; D010575:Pesticides / Q000494:pharmacology*; D010935:Plant Diseases / Q000469:parasitology; D014431:Tylenchoidea / Q000187:drug effects*
D010575:Pesticides