Control of banana burrowing nematode (Radopholus similis) by fenamiphos applied through micro-irrigation in North Queensland

Abstract

Nematicide application through micro-irrigation was evaluated over 5 years for control of banana root rot caused by the burrowing nematode (Radopholus similis). Fenamiphos emulsifiable concentrate (e.c.) applied monthly from April to November at 31 g a.i.1100 m row and in December at 125 g a.i.1100 m row, through drip and mini-sprinkler irrigation, was compared with the standard treatment of fenamiphos granules applied at 125 g a.i.1100 m row in April, August, and December. All treatments resulted in a total of 375 g a.i. 1100 m row.year. The fenamiphos treatments reduced (P<0.05) the severity of root rot in the final year of the experiment compared with the untreated control. Significant yield effects from the interaction between fenamiphos and irrigation were not detected until the fourth ratoon crop. Fenamiphos e.c. applied monthly through minisprinklers significantly (P<0.05) increased bunch weight and plant girth compared with all other treatments. Fenamiphos e.c. applied monthly through drip irrigation was equivalent to the granular treatment. Application of fenamiphos through micro-irrigation is simpler, safer, and more cost-effective than conventional nematicide application methods.