AgroPages-Syngenta's Clariva Complete Beans seed treatment shows effect in field experiment 2014-Agricultural news

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Clariva™ Complete Beans is a seed treatment from Syngenta for management of the soybean cyst nematode (SCN). Clariva Complete Beans contains Clariva™, with the active ingredient Pasteuria nishizawae, a bacterium that parasitizes SCN. Clariva Complete Beans also contains the seed treatment insecticide and fungicides that are in CruiserMaxx® Advanced (thiamethoxam, fludioxonil, mefenoxam) and Vibrance® (sedaxane).

In 2014, personnel from Iowa State University (ISU) and the Iowa Soybean Association (ISA) On-Farm Network® worked together to study the effects of Clariva on soybean yields and SCN soil population densities in experiments conducted throughout Iowa. There were nine small-plot experiments and 15 strip trials in SCN-infested fields in 2014.

Effects on SCN population densities

• There was a significant reduction in season-long SCN reproduction (comparing beginning- and end-of-season SCN soil population densities) associated with Clariva in small-plot experiments in east central (Urbana) and southeast (Fruitland) Iowa.

• Significant reductions in season-long SCN reproduction also were associated with Clariva when data from three experiments across central Iowa were combined and when data from experiments from across the state were combined for analysis.

• Significantly greater yields did not always occur with Clariva in experiments where significant reductions in season-long SCN reproduction were detected

Summary
The results of experiments conducted in 2014 comparing the yields and changes in SCN soil population densities between the two seed treatments were variable. Significant increases in soybean yields and decreases in SCN reproduction in association with Clariva were detected only in some experiments. Additional work is needed to determine the consistency of the differences detected and the effects of Clariva in additional environments and under different weather conditions. Summaries of all of the ISA On-Farm strip trials that compared Clariva Complete Beans and CruiserMaxx Advanced Tristan Mueller is Operations Manager for Agronomic Research with the Iowa Soybean Association On-Farm Network plus Vibrance in 2014 are available online.

Plans

There are nine additional small-plot experiments comparing these two seed treatments that will be conducted in 2015, and numerous on-farm strip trials also are planned.