Pesticide registration study in Hawaii (Chittaranjan Ray, Martin Sanda)

• evaluation of fate and transport of the chemicals at five different sites (three islands of Hawaii)

• new pesticide compounds for agriculture and pest control (S-metolachlor, imazaquin, sulfometuron-methyl, imidacloprid, and trifloxystrobin)

• two chemicals used as reference (herbicide atrazine and bromide tracer)

• extensive field and laboratory experiments

• results of the study published in Pest Management Science (2010), Pest Management Science (2011), and Journal of Contaminant Hydrology (2015)

 

Study location (five experimental sites on three islands).            Experimental plot design for the field leaching experiment.            Field layout of the leaching experiment (Waimanalo).

 

Automated tensiometers installed at three depths.                           In-situ measurement of K using tension disc infiltrometer.            Field sampling of soil for pesticide and bromide analysis.

 

Uniformity of irrigation application at the Poamoho site.                 Profile of pH and organic carbon for the five sites.                        Trend of estimated center of mass for sulfometuron-methyl.

 

Comparison of COM and AFR values for the Kula site.                         Field content of trifloxystrobin at the Mana site.                            Field recovery of imidacloprid at the Poamoho site.